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Hiển thị các bài đăng có nhãn CCNA 1 v6. Hiển thị tất cả bài đăng
Hiển thị các bài đăng có nhãn CCNA 1 v6. Hiển thị tất cả bài đăng

CCNA 1 (v5.1 + v6.0) Chapter 3 Exam Answers 2019 – 100% Full

Thứ Sáu, 4 tháng 1, 2019
  1. What method can be used by two computers to ensure that packets are not dropped because too much data is being sent too quickly?
    • encapsulation
    • flow control*
    • access method
    • response timeout
    Explain:
    In order for two computers to be able to communicate effectively, there must be a mechanism that allows both the source and destination to set the timing of the transmission and receipt of data. Flow control allows for this by ensuring that data is not sent too fast for it to be received properly.
  2. What type of communication will send a message to all devices on a local area network?
    • broadcast*
    • multicast
    • unicast
    • allcast
    Explain:Broadcast communication is a one-to-all communication. A unicast communication is a one-to-one communication. Multicast is a one-to-many communication where the message is delivered to a specific group of hosts. Allcast is not a standard term to describe message delivery.
  3. What process is used to place one message inside another message for transfer from the source to the destination?
    • access control
    • decoding
    • encapsulation*
    • flow control
    Explain:Encapsulation is the process of placing one message format into another message format. An example is how a packet is placed in its entirety into the data field as it is encapsulated into a frame.
  4. A web client is sending a request for a webpage to a web server. From the perspective of the client, what is the correct order of the protocol stack that is used to prepare the request for transmission?
    • HTTP, IP, TCP, Ethernet
    • HTTP, TCP, IP, Ethernet*
    • Ethernet, TCP, IP, HTTP
    • Ethernet, IP, TCP, HTTP
    Explain:
    1. HTTP governs the way that a web server and client interact.
    2. TCP manages individual conversations between web servers and clients.
    3. IP is responsible for delivery across the best path to the destination.
    4. Ethernet takes the packet from IP and formats it for transmission.
  5. Which statement is correct about network protocols?
    • Network protocols define the type of hardware that is used and how it is mounted in racks.
    • They define how messages are exchanged between the source and the destination.*
    • They all function in the network access layer of TCP/IP.
    • They are only required for exchange of messages between devices on remote networks.
    Explain:
    Network protocols are implemented in hardware, or software, or both. They interact with each other within different layers of a protocol stack. Protocols have nothing to do with the installation of the network equipment. Network protocols are required to exchange information between source and destination devices in both local and remote networks.
  6. Which statement is true about the TCP/IP and OSI models?
    • The TCP/IP transport layer and OSI Layer 4 provide similar services and functions.*
    • The TCP/IP network access layer has similar functions to the OSI network layer.
    • The OSI Layer 7 and the TCP/IP application layer provide identical functions.
    • The first three OSI layers describe general services that are also provided by the TCP/IP internet layer.
    Explain:
    he TCP/IP internet layer provides the same function as the OSI network layer. The transport layer of both the TCP/IP and OSI models provides the same function. The TCP/IP application layer includes the same functions as OSI Layers 5, 6, and 7.
  7. What is an advantage of using standards to develop and implement protocols?
    • A particular protocol can only be implemented by one manufacturer.
    • Products from different manufacturers can interoperate successfully.*
    • Different manufacturers are free to apply different requirements when implementing a protocol.
    • Standards provide flexibility for manufacturers to create devices that comply with unique requirements.
    Explain:
    Standards-based protocols enable products from different manufacturers to interoperate successfully. Standards-based protocols enable many manufacturers to implement that protocol. If different manufacturers implement different requirements within the same protocol, then their products will not be interoperable.
  8. What three application layer protocols are part of the TCP/IP protocol suite? (Choose three.)
    • ARP
    • DHCP *
    • DNS *
    • FTP*
    • NAT
    • PPP
    Explain:
    DNS, DHCP, and FTP are all application layer protocols in the TCP/IP protocol suite. ARP and PPP are network access layer protocols, and NAT is an internet layer protocol in the TCP/IP protocol suite.
  9. What are proprietary protocols?
    • protocols developed by private organizations to operate on any vendor hardware
    • protocols that can be freely used by any organization or vendor
    • protocols developed by organizations who have control over their definition and operation*
    • a collection of protocols known as the TCP/IP protocol suite
    Explain:
    Proprietary protocols have their definition and operation controlled by one company or vendor. Some of them can be used by different organizations with permission from the owner. The TCP/IP protocol suite is an open standard, not a proprietary protocol.
  10. What is an advantage of network devices using open standard protocols?
    • Network communications is confined to data transfers between devices from the same vendor.
    • A client host and a server running different operating systems can successfully exchange data.*
    • Internet access can be controlled by a single ISP in each market.
    • Competition and innovation are limited to specific types of products.
    Explain:
    An advantage of network devices implementing open standard protocols, such as from the TCP/IP suite, is that clients and servers running different operating systems can communicate with each other. Open standard protocols facilitate innovation and competition between vendors and across markets, and can reduce the occurrence of monopolies in networking markets.
  11. Refer to the exhibit. If Host1 were to transfer a file to the server, what layers of the TCP/IP model would be used?
    • only application and Internet layers
    • only Internet and network access layers
    • only application, Internet, and network access layers
    • application, transport, Internet, and network access layers*
    • only application, transport, network, data link, and physical layers
    • application, session, transport, network, data link, and physical layers
    Explain:
    The TCP/IP model contains the application, transport, internet, and network access layers. A file transfer uses the FTP application layer protocol. The data would move from the application layer through all of the layers of the model and across the network to the file server.
  12. Which three layers of the OSI model are comparable in function to the application layer of the TCP/IP model? (Choose three.)
    • application *
    • presentation *
    • session*
    • transport
    • data link
    • physical
    • network
    Explain:
    The TCP/IP model consists of four layers: application, transport, internet, and network access. The OSI model consists of seven layers: application, presentation, session, transport, network, data link, and physical. The top three layers of the OSI model: application, presentation, and session map to the application layer of the TCP/IP model.
  13. At which layer of the OSI model would a logical address be encapsulated?
    • physical layer
    • data link layer
    • network layer*
    • transport layer
    Explain:
    Logical addresses, also known as IP addresses, are encapsulated at the network layer. Physical addresses are encapsulated at the data link layer. Port addresses are encapsulated at the transport layer. No addresses are encapsulated at the physical layer.
  14. At which layer of the OSI model would a logical address be added during encapsulation??
    • physical layer
    • data link layer
    • network layer*
    • transport layer
    Explain:
    Logical addresses, also known as IP addresses, are encapsulated at the network layer. Physical addresses are encapsulated at the data link layer. Port addresses are encapsulated at the transport layer. No addresses are encapsulated at the physical layer.
  15. Which PDU format is used when bits are received from the network medium by the NIC of a host?
    • file
    • frame*
    • packet
    • segment
    Explain:
    When received at the physical layer of a host, the bits are formatted into a frame at the data link layer. A packet is the PDU at the network layer. A segment is the PDU at the transport layer. A file is a data structure that may be used at the application layer.
  16. Which PDU is processed when a host computer is de-encapsulating a message at the transport layer of the TCP/IP model?
    • bits
    • frame
    • packet
    • segment*
    Explain:
    At the transport layer, a host computer will de-encapsulate a segment to reassemble data to an acceptable format by the application layer protocol of the TCP/IP model.
  17. Refer to the exhibit. HostA is attempting to contact ServerB. Which two statements correctly describe the addressing that HostA will generate in the process? (Choose two.)
    • A packet with the destination IP address of RouterB.
    • A frame with the destination MAC address of SwitchA.
    • A packet with the destination IP address of RouterA.
    • A frame with the destination MAC address of RouterA.*
    • A packet with the destination IP address of ServerB.*
    • A frame with the destination MAC address of ServerB.
    Explain:
    In order to send data to ServerB, HostA will generate a packet that contains the IP address of the destination device on the remote network and a frame that contains the MAC address of the default gateway device on the local network.
  18. Which address does a NIC use when deciding whether to accept a frame?
    • source IP address
    • source MAC address
    • destination IP address
    • destination MAC address*
    • source Ethernet address
  19. What will happen if the default gateway address is incorrectly configured on a host?
    • The host cannot communicate with other hosts in the local network.
    • The switch will not forward packets initiated by the host.
    • The host will have to use ARP to determine the correct address of the default gateway.
    • The host cannot communicate with hosts in other networks.*
    • A ping from the host to 127.0.0.1 would not be successful.
    Explain:
    When a host needs to send a message to another host located on the same network, it can forward the message directly. However, when a host needs to send a message to a remote network, it must use the router, also known as the default gateway. This is because the data link frame address of the remote destination host cannot be used directly. Instead, the IP packet has to be sent to the router (default gateway) and the router will forward the packet toward its destination. Therefore, if the default gateway is incorrectly configured, the host can communicate with other hosts on the same network, but not with hosts on remote networks.
  20. Which characteristic describes the default gateway of a host computer?
    • the logical address of the router interface on the same network as the host computer*
    • the physical address of the switch interface connected to the host computer
    • the physical address of the router interface on the same network as the host computer
    • the logical address assigned to the switch interface connected to the router
    Explain:
    The default gateway is the IP address of an interface on the router on the same network as the sending host.
  21. Match the description to the organization. (Not all options are used.)


    ISOC -> The organization promotes the open development, evolution, and use of the internet throughout the world
    ISO -> This organization is the largest developer of international standars in the world for a wide variety of products and services. It is know for its Open System Interconection (OSI) reference model.
    IANA -> This organization is responsible for overseeing and managing IP address allocation, domain name management, and protocol identifiers
    Explain:
    The EIA is an international standards and trade organization for electronics organizations. It is best known for its standards related to electrical wiring, connectors, and the 19-inch racks used to mount networking equipment.
  22. Match the protocol function to the description while taking into consideration that a network client is visiting a web site. (Not all options are used.)


    Place the options in the following order: 
    governing the way a web server and a web client interact –> application protocol
    taking the segments from transport protocol, encapsulating them into packets, and assigning them with appropriate addresses –> internet protocol
    preparing packets to be transmitted over the network media –> network access protocol
    – not scored –
    managing the individual conversations between web servers and web clients –> transport protocol
    Explain:
    When a web client visits a web server, several network communication protocols are involved. These different protocols work together to ensure that the messages are received and understood by both parties. These protocols include the following:
    Application Protocol – governing the way a web server and a web client interact
    Transport Protocol – managing the individual conversations between web servers and web clients
    Internet Protocol – taking the formatted segments from the transport protocol, encapsulating them into packets, assigning them the appropriate addresses, and delivering them across the best path to the destination host
    Network Access Protocol – preparing packets to be transmitted over the network media
    Network Time Protocol is used to synchronize clocks between computer systems. It is not involved in this case.
  23. Match each description to its corresponding term. (Not all options are used.)


    Place the options in the following order: 
    – not scored –
    message encoding -> the process of converting information from one format into another acceptable for transmission
    message encapsulation -> the process of placing one message format inside another message format
    – not scored –
    message sizing -> the process of breaking up a long message into individual pieces before being sent over the network

Other Quetions

  1. A computer in a given network is communicating with a specific group of computers. What type of communication is this?
    • broadcast
    • multicast*
    • unicast
    • ARP
    • HTTP
  2. Which protocol is responsible for controlling the size and rate of the HTTP messages exchanged between server and client?
    • HTTP
    • ARP
    • TCP*
    • DHCP
  3. A user is viewing an HTML document located on a web server. What protocol segments the messages and manages the segments in the individual conversation between the web server and the web client?
    • DHCP
    • TCP*
    • HTTP
    • ARP
  4. Which IEEE standard enables a wireless NIC to connect to a wireless AP that is made by a different manufacturer?
    • 802.1
    • 802.11*
    • 802.3
    • 802.2
  5. What is a function of Layer 4 of the OSI model?
    • to specify the packet type to be used by the communications
    • to apply framing information to the packet, based on the attached media
    • to represent data to the user, including encoding and dialog control
    • to describe the ordered and reliable delivery of data between source and destination*
  6. What is a benefit of using a layered model for network communications?
    • fostering competition among device and software vendors by enforcing the compatibility of their products*
    • enhancing network transmission performance by defining targets for each layer
    • avoiding possible incompatibility issues by using a common set of developing tools
    • simplifying protocol development by limiting every layer to one function
  7. What is the general term that is used to describe a piece of data at any layer of a networking model?
    • frame
    • packet
    • protocol data unit*
    • segment
  8. Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network?
    • Data is sent from the internet layer to the network access layer.
    • Packets are sent from the network access layer to the transport layer.
    • Segments are sent from the transport layer to the internet layer.*
    • Frames are sent from the network access layer to the internet layer.
  9. What statement describes the function of the Address Resolution Protocol?
    • ARP is used to discover the IP address of any host on a different network.
    • ARP is used to discover the IP address of any host on the local network.
    • ARP is used to discover the MAC address of any host on a different network.
    • ARP is used to discover the MAC address of any host on the local network.*
  10. Which address provides a unique host address for data communications at the internet layer?
    • data-link address
    • logical address*
    • Layer 2 address
    • physical address
  11. Which protocol is used by a computer to find the MAC address of the default gateway on an Ethernet network?
    • ARP*
    • TCP
    • UDP
    • DHCP
  12. If the default gateway is configured incorrectly on the host, what is the impact on communications?
    • The host is unable to communicate on the local network.
    • The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks.*
    • The host can communicate with other hosts on remote networks, but is unable to communicate with hosts on the local network.
    • There is no impact on communications.
  13. Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. Based on the configured network, what IP address would PC1 and PC2 use as their default gateway?
    • 192.168.1.2
    • 10.1.1.1
    • 172.16.1.1
    • 192.168.1.1*
    • 192.168.1.10
  14. A user sends an HTTP request to a web server on a remote network. During encapsulation for this request, what information is added to the address field of a frame to indicate the destination?
    • the MAC address of the default gateway*
    • the IP address of the destination host
    • the MAC address of the destination host
    • the IP address of the default gateway
  15. Refer to the exhibit. PC-A and PC-B are both in VLAN 60. PC-A is unable to communicate with PC-B. What is the problem?
    • The native VLAN is being pruned from the link.
    • The trunk has been configured with the switchport nonegotiate command.
    • The native VLAN should be VLAN 60.
    • The VLAN that is used by PC-A is not in the list of allowed VLANs on the trunk.*
  16. Which command is used to remove only VLAN 20 from a switch?
    • no switchport access vlan 20
    • no vlan 20*
    • delete vlan.dat
    • delete flash:vlan.dat
Read more ...

CCNA 1 (v5.1 + v6.0) Chapter 2 Exam Answers 2019 – 100% Full

Thứ Năm, 3 tháng 1, 2019
  1. What is the function of the kernel of an operating software?
    • It provides a user interface that allows users to request a specific task.
    • The kernel links the hardware drivers with the underlying electronics of a computer.
    • It is an application that allows the initial configuration of a Cisco device.
    • The kernel provisions hardware resources to meet software requirements.*
  2. Explain:
    Operating systems function with a shell, a kernel, and the hardware. The shell interfaces with the users, allowing them to request specific tasks from the device. The kernel provisions resources from the hardware to meet software requirements. The hardware functions by using drivers and their underlying electronics. The hardware represents the physical components of the device.
  3. A network administrator needs to keep the user ID, password, and session contents private when establishing remote CLI connectivity with a switch to manage it. Which access method should be chosen?
    • Telnet
    • Console
    • AUX
    • SSH*
  4. Explain:
    To be truly private a technician would use a Console connection however if remote management is required SSH provides a secure method.
  5. Which procedure is used to access a Cisco 2960 switch when performing an initial configuration in a secure environment?
    • Use Telnet to remotely access the switch through the network.
    • Use the console port to locally access the switch from a serial or USB interface of the PC.*
    • Use Secure Shell to remotely access the switch through the network.
    • Use the AUX port to locally access the switch from a serial or USB interface of the PC.
  6. Explain:
    Telnet and SSH require active networking services to be configured on a Cisco device before they become functional. Cisco switches do not contain AUX ports.
  7. Which command or key combination allows a user to return to the previous level in the command hierarchy?
    • end
    • exit*
    • Ctrl-Z
    • Ctrl-C
  8. Explain:
    End and CTRL-Z return the user to the privileged EXEC mode. Ctrl-C ends a command in process. The exit command returns the user to the previous level.
  9. A router has a valid operating system and a configuration file stored in NVRAM. The configuration file contains an enable secret password but no console password. When the router boots up, which mode will display?
    • global configuration mode
    • setup mode
    • privileged EXEC mode
    • user EXEC mode *
  10. Explain:
    If a Cisco IOS device has a valid IOS and a valid configuration file, it will boot into user EXEC mode. A password will be required to enter privileged EXEC mode.
  11. Which two functions are provided to users by the context-sensitive help feature of the Cisco IOS CLI? (Choose two.)
    • providing an error message when a wrong command is submitted
    • displaying a list of all available commands within the current mode*
    • allowing the user to complete the remainder of an abbreviated command with the TAB key
    • determining which option, keyword, or argument is available for the entered command*
    • selecting the best command to accomplish a task
  12. Explain:
    Context-sensitive help provides the user with a list of commands and the arguments associated with those commands within the current mode of a networking device. A syntax checker provides error checks on submitted commands and the TAB key can be used for command completion if a partial command is entered.
  13. Which information does the show startup-config command display?
    • the IOS image copied into RAM
    • the bootstrap program in the ROM
    • the contents of the current running configuration file in the RAM
    • the contents of the saved configuration file in the NVRAM *
  14. Explain:
    The show startup-config command displays the saved configuration located in NVRAM. The show running-config command displays the contents of the currently running configuration file located in RAM.​
  15. Why is it important to configure a hostname on a device?
    • a Cisco router or switch only begins to operate when its hostname is set
    • a hostname must be configured before any other parameters
    • to identify the device during remote access (SSH or telnet)*
    • to allow local access to the device through the console port
  16. Explain:
    It is important to configure a hostname because various authentication processes use the device hostname. Hostnames are helpful for documentation, and they identify the device during remote access.
  17. Which two host names follow the guidelines for naming conventions on Cisco IOS devices? (Choose two.)
    • Branch2!
    • RM-3-Switch-2A4*
    • Floor(15)
    • HO Floor 17
    • SwBranch799*
  18. Explain:
    Some guidelines for naming conventions are that names should:
    Start with a letter
    Contain no spaces
    End with a letter or digit
    Use only letters, digits, and dashes
    Be less than 64 characters in length
  19. How does the service password-encryption command enhance password security on Cisco routers and switches?
    • It encrypts passwords as they are sent across the network.
    • It encrypts passwords that are stored in router or switch configuration files.*
    • It requires that a user type encrypted passwords to gain console access to a router or switch.
    • It requires encrypted passwords to be used when connecting remotely to a router or switch with Telnet.
  20. Explain:
    The service password-encryption command encrypts plaintext passwords in the configuration file so that they cannot be viewed by unauthorized users.
  21. In your opinion (this has no bearing on your grade), please indicate how enthusiastic you are about the content of this course and the things you’re learning (or have learned):
    • Not At All Enthusiastic
    • Slightly Enthusiastic
    • Enthusiastic*
    • Very Enthusiastic
    • Completely Enthusiastic
  22. In your opinion (this has no bearing on your grade), please indicate your interest in this course:
    • Not At All Interested
    • Slightly Interested
    • Interested*
    • Very Interested
    • Completely Interested
  23. Refer to the exhibit. A network administrator is configuring the MOTD on switch SW1. What is the purpose of this command?
    • to display a message when a user accesses the switch*
    • to configure switch SW1 so that only the users in the Admin group can telnet into SW1
    • to force users of the Admin group to enter a password for authentication
    • to configure switch SW1 so that the message will display when a user enters the enable command
  24. Explain:
    A banner message can be an important part of the legal process in the event that someone is prosecuted for breaking into a device. A banner message should make it clear that only authorized personnel should attempt to access the device. However, the banner command does not prevent unauthorized entry.
  25. While trying to solve a network issue, a technician made multiple changes to the current router configuration file. The changes did not solve the problem and were not saved. What action can the technician take to discard the changes and work with the file in NVRAM?
    • Issue the reload command without saving the running configuration.*
    • Delete the vlan.dat file and reboot the device.
    • Close and reopen the terminal emulation software.
    • Issue the copy startup-config running-config command.
  26. Explain:
    The technician does not want to make any mistakes trying to remove all the changes that were done to the running configuration file. The solution is to reboot the router without saving the running configuration. The copy startup-config running-config command does not overwrite the running configuration file with the configuration file stored in NVRAM, but rather it just has an additive effect.
  27. What is the function of the kernel of an operating system?
    • It provides a user interface that allows users to request a specific task.
    • The kernel links the hardware drivers with the underlying electronics of a computer.
    • It is an application that allows the initial configuration of a Cisco device.
    • The kernel provisions hardware resources to meet software requirements.*
  28. Explain:
    Operating systems function with a shell, a kernel, and the hardware. The shell interfaces with the users, allowing them to request specific tasks from the device. The kernel provisions resources from the hardware to meet software requirements. The hardware functions by using drivers and their underlying electronics. The hardware represents the physical components of the device.
  29. A router with a valid operating system contains a configuration file stored in NVRAM. The configuration file has an enable secret password but no console password. When the router boots up, which mode will display?
    • privileged EXEC mode
    • setup mode
    • user EXEC mode*
    • global configuration mode
  30. Explain:If a Cisco IOS device has a valid IOS and a valid configuration file, it will boot into user EXEC mode. A password will be required to enter privileged EXEC mode.
  31. In your opinion (this has no bearing on your grade), please rate your motivation to do well in this course:
    • Not At All Motivated
    • Slightly Motivated
    • Motivated
    • Very Motivated*
    • Completely Motivated
  32. Which statement is true about the running configuration file in a Cisco IOS device?
    • It affects the operation of the device immediately when modified.*
    • It is stored in NVRAM.
    • It should be deleted using the erase running-config command.
    • It is automatically saved when the router reboots.
  33. Explain:
    As soon as configuration commands are entered into a router, they modify the device immediately. Running configuration files can not be deleted nor are they saved automatically.
  34. What are two characteristics of RAM on a Cisco device? (Choose two.)
    • RAM provides nonvolatile storage.
    • The configuration that is actively running on the device is stored in RAM. *
    • The contents of RAM are lost during a power cycle. *
    • RAM is a component in Cisco switches but not in Cisco routers.
    • RAM is able to store multiple versions of IOS and configuration files.
  35. Explain:
    RAM stores data that is used by the device to support network operations. The running configuration is stored in RAM. This type of memory is considered volatile memory because data is lost during a power cycle. Flash memory stores the IOS and delivers a copy of the IOS into RAM when a device is powered on. Flash memory is nonvolatile since it retains stored contents during a loss of power.
  36. Which interface allows remote management of a Layer 2 switch?
    • the AUX interface
    • the console port interface
    • the switch virtual interface*
    • the first Ethernet port interface
  37. Explain:
    In a Layer 2 switch, there is a switch virtual interface (SVI) that provides a means for remotely managing the device.
  38. Which interface is the default SVI on a Cisco switch?
    • FastEthernet 0/1
    • GigabitEthernet 0/1
    • VLAN 1*
    • VLAN 99
  39. Explain:
    An SVI is a virtual interface and VLAN 1 is enabled by default on Cisco switches. VLAN 99 must be configured to be used. FastEthernet 0/1 and GigabitEthernet 0/1 are physical interfaces.
  40. Why would a Layer 2 switch need an IP address?
    • to enable the switch to send broadcast frames to attached PCs
    • to enable the switch to function as a default gateway
    • to enable the switch to be managed remotely*
    • to enable the switch to receive frames from attached PCs
  41. Explain:
    A switch, as a Layer 2 device, does not need an IP address to transmit frames to attached devices. However, when a switch is accessed remotely through the network, it must have a Layer 3 address. The IP address must be applied to a virtual interface rather than to a physical interface. Routers, not switches, function as default gateways.
  42. What command can be used on a Windows PC to see the IP configuration of that computer?
    • ping
    • ipconfig*
    • show interfaces
    • show ip interface brief
  43. Explain:
    On a Windows PC, the ipconfig command can be used to verify the current IP configuration. The ping command can be used to verify connectivity to other network devices. The show interfaces and show ip interface brief commands are both Cisco IOS commands that are used to see the status of router and switch interfaces.
  44. A technician is adding a new PC to a LAN. After unpacking the components and making all the connections, the technician starts the PC. After the OS loads, the technician opens a browser, and verifies that the PC can reach the Internet. Why was the PC able to connect to the network with no additional configuration?
    • The PC does not require any additional information to function on the network.
    • The PC came preconfigured with IP addressing information from the factory.
    • The PC was preconfigured to use DHCP.*
    • The PC used DNS to automatically receive IP addressing information from a server.
    • The PC virtual interface is compatible with any network.
  45. Explain:
    The new PC was preconfigured to use DHCP. When the PC is connected to a network that uses DHCP, it gets the IP address settings from the DHCP server that will allow it to function on the network. All devices require at least an IP address and subnet mask to function on a LAN. DNS does not automatically configure addresses on hosts. PC virtual interfaces are not universally compatible with LANs and do not necessarily provide a host with an IP address. At this place in the course, virtual interfaces are used on network switches.
  46. What is a user trying to determine when issuing a ping 10.1.1.1 command on a PC?
    • if the TCP/IP stack is functioning on the PC without putting traffic on the wire
    • if there is connectivity with the destination device*
    • the path that traffic will take to reach the destination
    • what type of device is at the destination
  47. Explain:
    The ping destination command can be used to test connectivity.
  48. Refer to the exhibit. A network technician is testing connectivity in a new network. Based on the test results shown in the exhibit, which device does the technician have connectivity with and which device does the technician not have connectivity with? (Choose two.)
    • connectivity: switch 2*
    • connectivity: PC-D
    • connectivity: PC-B
    • no connectivity: switch 1
    • no connectivity: switch 2
    • no connectivity: PC-C*
  49. Explain:
    The exhibit shows ping tests to two devices. One device has the IP address of 192.168.1.2, which is switch 2. The other test is to the IP address of 192.168.1.21, which is host PC-C. For the first test, to switch 2, the results are successful, with four reply messages received. This means that connectivity exists to switch 2. For the second test, all four messages timed out. This indicates that connectivity does not exist to PC-C.
  50. Refer to the exhibit.

    Refer to the exhibit. What three facts can be determined from the viewable output of the show ip interface brief command? (Choose three.)
    • Two physical interfaces have been configured.
    • The switch can be remotely managed.*
    • One device is attached to a physical interface.*
    • Passwords have been configured on the switch.
    • Two devices are attached to the switch.
    • The default SVI has been configured.*
  51. Explain:
    Vlan1 is the default SVI. Because an SVI has been configured, the switch can be configured and managed remotely. FastEthernet0/0 is showing up and up, so a device is connected.
  52. An administrator is configuring a switch console port with a password. In what order will the administrator travel through the IOS modes of operation in order to reach the mode in which the configuration commands will be entered? (Not all options are used.)


    Place the options in the following order:
    – not scored –
    second mode
    final mode
    third mode
    first mode
    Explain:
    The configuration mode that the administrator first encounters is user EXEC mode. After the enable command is entered, the next mode is privileged EXEC mode. From there, the configure terminal command is entered to move to global configuration mode. Finally, the administrator enters the line console 0 command to enter the mode in which the configuration will be entered.
  53. Match the definitions to their respective CLI hot keys and shortcuts. (Not all options are used.)
    Question

    Answer

    Place the options in the following order: 
    completes abbreviated commands and parameters
    displays the next screen
    scrolls backwards through previously entered commands
    – not scored –
    provides context-sensitive help
    aborts commands such as trace and ping
    Explain:
    The shortcuts with their functions are as follows:
    – Tab – Completes the remainder of a partially typed command or keyword
    – Space bar – displays the next screen
    – ? – provides context-sensitive help
    – Up Arrow – Allows user to scroll backward through former commands
    – Ctrl-C – cancels any command currently being entered and returns directly to privileged EXEC mode
    – Ctrl-Shift-6 – Allows the user to interrupt an IOS process such as ping or traceroute
  54. Other Questions

  55. A network administrator is planning an IOS upgrade on several of the head office routers and switches. Which three questions must be answered before continuing with the IOS selection and upgrade? (Choose three.)
    • Are the devices on the same LAN?
    • Do the devices have enough NVRAM to store the IOS image?
    • What models of routers and switches require upgrades?*
    • What ports are installed on the routers and switches?
    • Do the routers and switches have enough RAM and flash memory for the proposed IOS versions? *
    • What features are required for the devices?*
  56. A router has a valid operating system and a configuration stored in NVRAM. When the router boots up, which mode will display?
    • global configuration mode
    • setup mode
    • ROM monitor mode
    • user EXEC mode*
  57. Which two characters are allowed as part of the hostname of a Cisco device? (Choose two.)
    • numbers*
    • question mark
    • space
    • tab
    • dash*
  58. What is a result of using the service password-encryption command on a Cisco network device?
    • The command encrypts the banner message.
    • The command encrypts the enable mode password.
    • All passwords in the configuration are not shown in clear text when viewing the configuration.*
    • A network administrator who later logs into the device will be required to enter an administrator password in order to gain access to the Cisco device.
  59. A new network administrator has been asked to enter a banner message on a Cisco device. What is the fastest way a network administrator could test whether the banner is properly configured?
    • Reboot the device.
    • Enter CTRL-Z at the privileged mode prompt.
    • Exit global configuration mode.
    • Power cycle the device.
    • Exit privileged EXEC mode and press Enter.*
  60. Passwords can be used to restrict access to all or parts of the Cisco IOS. Select the modes and interfaces that can be protected with passwords. (Choose three.)
    • VTY interface *
    • console interface*
    • Ethernet interface
    • boot IOS mode
    • privileged EXEC mode*
    • router configuration mode
  61. What benefit does DHCP provide to a network?
    • Hosts always have the same IP address and are therefore always reachable.
    • DHCP allows users to refer to locations by a name rather than an IP address.
    • Hosts can connect to the network and get an IP address without manual configuration.*
    • Duplicate addresses cannot occur on a network that issues dynamic addresses using DHCP and has static assignments.
  62. What criterion must be followed in the design of an IPv4 addressing scheme for end devices?
    • Each IP address must match the address that is assigned to the host by DNS.
    • Each IP address must be unique within the local network.*
    • Each IP address needs to be compatible with the MAC address.
    • Each local host should be assigned an IP address with a unique network component.
  63. Refer to the exhibit. A switch was configured as shown. A ping to the default gateway was issued, but the ping was not successful. Other switches in the same network can ping this gateway. What is a possible reason for this?
    • The VLAN IP address and the default gateway IP address are not in the same network.
    • The local DNS server is not functioning correctly.
    • The no shutdown command was not issued for VLAN 1.*
    • The ip default-gateway command has to be issued in the VLAN interface configuration mode.
    • The default gateway address must be 192.168.10.1.
  64. Match the difinitions to their respective CLI hot keys and shortcuts.

    Tab -> Completes abbreviated commands and parameters
    Ctrl-R -> returns directly to the privileged EXEC mode
    Up Arrow -> scrolls backwards through previously entered commands
    Ctrl-Z -> cancels any command currently being entered and returns directly to privileged EXEC mode
    Ctrl-C -> Redisplays, on a new line, the command currently being typed
  65. Which two features are characteristics of flash memory? (Choose two.)
    Flash receives a copy of the IOS from RAM when a device is powered on.
    Flash provides nonvolatile storage.*
    The contents of flash may be overwritten.*
    Flash is a component in Cisco switches but not in Cisco routers.
    The contents of flash may be lost during a power cycle.
  66. Match the description to the common IOS CLI access method.

    Console port
    It displays startup, debugging, and error messages by default.*
    It can be used to restore an out-of-box configuration on a switch or router.*
    Virtual interface
    It allows access throught use of Telnet or SSH protocols.*
    It requires an active network connection.*
    AUX port
    It connects throught dialup connections*
    It is not supported on Catalyst switch devices*
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