CCNA 1 R&S ITN Chapter 5 v5.0 Exam Answers 2014

1

2 
A host is trying to send a packet to a device on a remote LAN segment, but there are currently no mappings in its ARP cache. How will the device obtain a destination MAC address?

It will send a request to the DNS server for the destination MAC address.

It will send an ARP request for the MAC address of the destination device.

It will send the frame and use its own MAC address as the destination.

It will send the frame with a broadcast MAC address.

It will send an ARP request for the MAC address of the default gateway.*

3 
Which address or combination of addresses does a Layer 3 switch use to make forwarding decisions?

MAC and IP addresses*

MAC address only

MAC and port addresses

port address only

IP address only

4 
What are two potential network problems that can result from ARP operation? (Choose two.)

Multiple ARP replies result in the switch MAC address table containing entries that match the MAC addresses of hosts that are connected to the relevant switch port.

On large networks with low bandwidth, multiple ARP broadcasts could cause data communication delays.*

Network attackers could manipulate MAC address and IP address mappings in ARP messages with the intent of intercepting network traffic.*

Manually configuring static ARP associations could facilitate ARP poisoning or MAC address spoofing.

Large numbers of ARP request broadcasts could cause the host MAC address table to overflow and prevent the host from communicating on the network.

5

Launch PT Hide and Save PT
Open the PT Activity. Perform the tasks in the activity instruction and then answer the question.

What destination address will PC1 include in the destination address field of the Ethernet frame that it sends to PC2?
00e0.b0be.8014

0030.a3e5.0401*

192.168.0.34

192.168.0.17

0007.ec35.a5c6

6 
How does adding an Ethernet line card affect the form factor of a switch?

by increasing the back plane switching speed

by expanding the port density*

by expanding the NVRAM capacity

by making the switch stackable

7 
Which two statements are correct about MAC and IP addresses during data transmission if NAT is not involved? (Choose two.)

Destination MAC addresses will never change in a frame that goes across seven routers.

A packet that has crossed four routers has changed the destination IP address four times.

Destination and source MAC addresses have local significance and change every time a frame goes from one LAN to another.*

Destination IP addresses in a packet header remain constant along the entire path to a target host.*

Every time a frame is encapsulated with a new destination MAC address, a new destination IP address is needed.

8 
What is the Layer 2 multicast MAC address that corresponds to the Layer 3 IPv4 multicast address 224.139.34.56?

FE-80-00-0B-22-38

01-00-5E-0B-22-38*

FF-FF-FF-0B-22-38

00-00-00-0B-22-38

01-5E-00-0B-22-38

9 
What is the purpose of the preamble in an Ethernet frame?

is used to identify the destination address

is used to identify the source address

is used as a padding for data

is used for timing synchronization*

10 
A Layer 2 switch is used to switch incoming frames from a 1000BASE-T port to a port connected to a 100Base-T network. Which method of memory buffering would work best for this task?

level 1 cache buffering

shared memory buffering*

fixed configuration buffering

port-based buffering

11 
A network administrator is connecting two modern switches using a straight-through cable. The switches are new and have never been configured. Which three statements are correct about the final result of the connection? (Choose three.)

The auto-MDIX feature will configure the interfaces eliminating the need for a crossover cable.*

The connection will not be possible unless the administrator changes the cable to a crossover cable.

The duplex capability has to be manually configured because it cannot be negotiated.

If both switches support different speeds, they will each work at their own fastest speed.

The link between switches will work as full-duplex.*

The link between the switches will work at the fastest speed that is supported by both switches.*

12

Refer to the exhibit. PC1 issues an ARP request because it needs to send a packet to PC2. In this scenario, what will happen next?​

RT1 will send an ARP reply with its Fa0/0 MAC address.​

PC2 will send an ARP reply with its MAC address.*

RT1 will send an ARP reply with the PC2 MAC address.​

SW1 will send an ARP reply with its Fa0/1 MAC address.​

SW1 will send an ARP reply with the PC2 MAC address.​

13 
What is a characteristic of a contention-based access method?

It processes more overhead than the controlled access methods do.

It scales very well under heavy media use.

It is a nondeterministic method.*

It has mechanisms to track the turns to access the media.

14 
What statement illustrates a drawback of the CSMA/CD access method?

Collisions can decrease network performance.*

Deterministic media access protocols slow network performance.

CSMA/CD LAN technologies are only available at slower speeds than other LAN technologies.

It is more complex than non-deterministic protocols.
15 
When would a switch record multiple entries for a single switch port in its MAC address table?

when the switch is configured for Layer 3 switching

when another switch is connected to the switch port*

when a router is connected to the switch port

when multiple ARP broadcasts have been forwarded
16 
Which two statements describe a fixed configuration Ethernet switch? (Choose two.)

An SVI cannot be configured on the switch.

A fixed configuration switch may be stackable.*

The number of ports on the switch cannot be increased.*

The port density of the switch is determined by the Cisco IOS.

The switch cannot be configured with multiple VLANs.

17 
Which two statements describe features or functions of the logical link control sublayer in Ethernet standards? (Choose two.)

Logical link control is implemented in software.*

The LLC sublayer interacts directly with the NIC driver software.

The data link layer uses LLC to communicate with the upper layers of the protocol suite.*

The LLC sublayer is responsible for the placement and retrieval of frames on and off the media.

Logical link control is specified in the IEEE 802.3 standard.
18 
A network administrator issues the following commands on a Layer 3 switch:

DLS1(config)# interface f0/3
DLS1(config-if)# no switchport
DLS1(config-if)# ip address 172.16.0.1 255.255.255.0
DLS1(config-if)# no shutdown
DLS1(config-if)# end

What is the administrator configuring?

a Cisco Express Forwarding instance

a routed port*

a trunk interface

a switched virtual interface

19 
Which statement is true about MAC addresses?

The first three bytes are used by the vendor assigned OUI.*

MAC addresses are implemented by software.

The ISO is responsible for MAC addresses regulations.

A NIC only needs a MAC address if connected to a WAN.

20

Refer to the exhibit. The exhibit shows a small switched network and the contents of the MAC address table of the switch. PC1 has sent a frame addressed to PC3. What will the switch do with the frame?

The switch will forward the frame to all ports.

The switch will forward the frame to all ports except port 4.*

The switch will forward the frame only to port 2.

The switch will discard the frame.

The switch will forward the frame only to ports 1 and 3.
21 
Fill in the blank.
The binary number 0000 1010 can be expressed as “A” in hexadecimal.
22 
What are two features of ARP? (Choose two.)

If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast.*

An ARP request is sent to all devices on the Ethernet LAN and contains the IP address of the destination host and its multicast MAC address.

When a host is encapsulating a packet into a frame, it refers to the MAC address table to determine the mapping of IP addresses to MAC addresses.

If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.*

If no device responds to the ARP request, then the originating node will broadcast the data packet to all devices on the network segment.

23

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CCNA 1 R&S ITN Chapter 4 v5.0 Exam Answers 2014

1 
What are two reasons for physical layer protocols to use frame encoding techniques? (Choose two.)

to identify where the frame starts and ends*

to distinguish data bits from control bits*

to reduce the number of collisions on the media

to increase the media throughput

to provide better media error correction

2 
Which statement is correct about multimode fiber?

Multimode fiber commonly uses a laser as a light source.

Multimode fiber cables carry signals from multiple connected sending devices.

SC-ST patch cords are used with multimode fiber cables.

SC-SC patch cords are used with multimode fiber cables.*

3 
Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?

data link*

application

transport

physical

4 
The throughput of a FastEthernet network is 80 Mb/s. The traffic overhead for establishing sessions, acknowledgments, and encapsulation is 15 Mb/s for the same time period. What is the goodput for this network?

15 Mb/s

55 Mb/s

65 Mb/s*

95 Mb/s

80 Mb/s

5 
A network administrator notices that some newly installed Ethernet cabling is carrying corrupt and distorted data signals. The new cabling was installed in the ceiling close to fluorescent lights and electrical equipment. Which two factors may interfere with the copper cabling and result in signal distortion and data corruption? (Choose two.)

RFI​ *

signal attenuation

crosstalk

EMI *

extended length of cabling

7 
What is the purpose of the FCS field in a frame?

to obtain the MAC address of the sending node

to verify the logical address of the sending node

to compute the CRC header for the data field

to determine if errors occurred in the transmission and reception*

8 
As data travels on the media in a stream of 1s and 0s how does a receiving node identify the beginning and end of a frame?​

The transmitting node sends an out-of-band signal to the receiver about the beginning of the frame.

The transmitting node sends a beacon to notify that a data frame is attached.

The receiving node identifies the beginning of a frame by seeing a physical address.

The transmitting node inserts start and stop bits into the frame.*

9 
Which statement describes signaling at the physical layer?

Sending the signals asynchronously means that they are transmitted without a clock signal.*

Signaling is a method of converting a stream of data into a predefined code.

Wireless encoding includes sending a series of clicks to delimit the frames.

In signaling, a 1 always represents voltage and a 0 always represents the absence of voltage.

10 
A network administrator is designing the layout of a new wireless network. Which three areas of concern should be accounted for when building a wireless network? (Choose three.)

mobility options

extensive cabling

coverage area*

interference*

packet collision

security*

11 
What is one main characteristic of the data link layer?

It converts a stream of data bits into a predefined code.

It shields the upper layer protocol from being aware of the physical medium to be used in the communication.*

It accepts Layer 3 packets and decides the path by which to forward a frame to a host on a remote network.

It generates the electrical or optical signals that represent the 1 and 0 on the media.

12 
What is one advantage of using fiber optic cabling rather than copper cabling?

It is easier to terminate and install than copper cabling.

It is able to be installed around sharp bends.

It is usually cheaper than copper cabling.

It is able to carry signals much farther than copper cabling.*
13 
Fill in the blank.
What acronym is used to reference the data link sublayer that identifies the network layer protocol encapsulated in the frame?
“LLC”

14 
Why are two strands of fiber used for a single fiber optic connection?

They allow for full-duplex connectivity.*

They prevent crosstalk from causing interference on the connection.

They increase the speed at which the data can travel.

The two strands allow the data to travel for longer distances without degrading.
15

Refer to the exhibit. The PC is connected to the console port of the switch. All the other connections are made through FastEthernet links. Which types of UTP cables can be used to connect the devices?​

1 – crossover, 2 – rollover, 3 – straight-through

1 – crossover, 2 – straight-through, 3 – rollover

1 – rollover, 2 – straight-through, 3 – crossover*

1 – rollover, 2 – crossover, 3 – straight-through
16 
What is true concerning physical and logical topologies?

Physical topologies display the IP addressing scheme of each network.

Logical topologies determine the media access control method used.*

Physical topologies are concerned with how a network transfers frames.

The logical topology is always the same as the physical topology.

17 
Fill in the blank.
The term “Bandwidth” indicates the capacity of a medium to carry data and it is typically measured in kilobits per second (kb/s) or megabits per second (Mb/s).​
18

Refer to the exhibit. What is wrong with the displayed termination?

The untwisted length of each wire is too long.*

The wires are too thick for the connector that is used.

The jack used is an RJ-11 connector instead of an RJ-45 connector.

The cable is not shielded.

19 
Fill in the blank with a number.
10,000,000,000 b/s can also be written as    ”10”     Gb/s.
20 
What are two characteristics of 802.11 wireless networks? (Choose two.)

Collisions can exist in the networks. *

They are collision-free networks.

They use CSMA/CD technology.

Stations can transmit at any time.

They use CSMA/CA technology.*

21 
A network administrator is required to upgrade wireless access to end users in a building. To provide data rates up to 1.3 Gb/s and still be backward compatible with older devices, which wireless standard should be implemented?

802.11n

802.11ac*

802.11g

802.11b
22 
How is the magnetic field cancellation effect enhanced in UTP cables?

by decreasing the number of wires that are used to carry data

by increasing the thickness of the PVC sheath that encases all the wires

by increasing and varying the number of twists in each wire pair*

by increasing the thickness of the copper wires

23
Match the steps to the physical layer operations that occur when data is sent from one node and received at another node.

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CCNA 1 R&S ITN Chapter 3 v5.0 Exam Answers 2014

1. 
Which PDU format is used when bits are received from the network medium by the NIC of a host?
packet
segment
frame
file

2. 
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

3. 
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
avoiding possible incompatibility issues by using a common set of developing tools
enhancing network transmission performance by defining targets for each layer
simplifying protocol development by limiting every layer to one function

4. 
What method can be used by two computers to ensure that packets are not dropped because too much data is being sent too quickly?
flow control
encapsulation
access method
response timeout

5. 
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, TCP, IP, Ethernet
Ethernet, TCP, IP, HTTP
HTTP, IP, TCP, Ethernet
Ethernet, IP, TCP, HTTP

6. 
Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network?
Packets are sent from the network access layer to the transport layer.
Segments are sent from the transport layer to the internet layer.
Data is sent from the internet layer to the network access layer.
Frames are sent from the network access layer to the internet layer.

7. 
Which protocol is responsible for controlling the size and rate of the HTTP messages exchanged between server and client?
ARP
HTTP
TCP
DHCP

8. 

Launch PT Hide and Save PT

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
192.168.1.10
172.16.1.1
192.168.1.1

9.
A computer in a given network is communicating with a specific group of computers. What type of communication is this?
broadcast
HTTP
multicast
unicast
ARP

10. 
What is a function of Layer 4 of the OSI model?
to represent data to the user, including encoding and dialog control
to specify the packet type to be used by the communications
to describe the ordered and reliable delivery of data between source and destination
to apply framing information to the packet, based on the attached media

11. 
What is an advantage of network devices using open standard protocols?
Competition and innovation are limited to specific types of products.
A client host and a server running different operating systems can successfully exchange data.
Network communications is confined to data transfers between devices from the same vendor.
Internet access can be controlled by a single ISP in each market.

12. 
Which IEEE standard enables a wireless NIC to connect to a wireless AP that is made by a different manufacturer?
802.11
802.1
802.3
802.2

13. 
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.
There is no impact on communications.
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.

14. 
What statement describes the function of the Address Resolution Protocol?
ARP is used to discover the IP address of any host on the local network.
ARP is used to discover the IP address of any host on a different 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.

15. 
At which layer of the OSI model would a logical address be encapsulated?
transport layer
physical layer
network layer
data link layer

16. 
What is the general term that is used to describe a piece of data at any layer of a networking model?
protocol data unit
segment
frame
packet

17. 
Which statement is true about the TCP/IP and OSI models?​
The first three OSI layers describe general services that are also provided by the TCP/IP internet layer.​
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.

18. 
Which address provides a unique host address for data communications at the internet layer?
Layer 2 address
data-link address
physical address
logical address

19. 
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
HTTP
ARP
TCP

20. 
Which address does a NIC use when deciding whether to accept a frame?
source MAC address
destination MAC address
source Ethernet address
destination IP address
source IP address

21. 
Match the description to the organization.

22. 
What are proprietary protocols?
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
protocols developed by private organizations to operate on any vendor hardware

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CCNA 1 R&S ITN Chapter 2 v5.0 Exam Answers 2014

1.

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 default gateway address must be 192.168.10.1.
The ip default-gateway command has to be issued in the VLAN interface configuration mode.
The VLAN IP address and the default gateway IP address are not in the same network.
The no shutdown command was not issued for VLAN 1.
The local DNS server is not functioning correctly.

2.
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.
Close and reopen the terminal emulation software.
Delete the vlan.dat file and reboot the device.
Issue the copy startup-config running-config command.

3.
Why is it important to configure a hostname on a device?

to allow local access to the device through the console port
a Cisco router or switch only begins to operate when its hostname is set
to identify the device during remote access (SSH or telnet)
a hostname must be configured before any other parameters

4.
Which procedure is used to access a Cisco 2960 switch when performing an initial configuration in a secure environment?

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 Telnet 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.

5.
What criterion must be followed in the design of an IPv4 addressing scheme for end devices?

Each local host should be assigned an IP address with a unique network component.
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.

6.
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?

AUX
SSH
Console
Telnet

7.
Which interface allows remote management of a Layer 2 switch?

the switch virtual interface
the console port interface
the AUX interface
the first Ethernet port interface

8.
What is a result of using the service password-encryption command on a Cisco network device?

All passwords in the configuration are not shown in clear text when viewing the configuration.
The command encrypts the banner message.
The command encrypts the enable mode password.
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.

9.
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

10.
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.)

What models of routers and switches require upgrades?
Do the routers and switches have enough RAM and flash memory for the proposed IOS versions?
What ports are installed on the routers and switches?
Are the devices on the same LAN?
What features are required for the devices?
Do the devices have enough NVRAM to store the IOS image?

11. What benefit does DHCP provide to a network?

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.
DHCP allows users to refer to locations by a name rather than an IP address.
Hosts always have the same IP address and are therefore always reachable.

12.
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
allowing the user to complete the remainder of an abbreviated command with the TAB key
displaying a list of all available commands within the current mode
selecting the best command to accomplish a task
determining which option, keyword, or argument is available for the entered command

13.
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
user EXEC mode
setup mode
ROM monitor mode

14.
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.

15.
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.)

boot IOS mode
Ethernet interface
privileged EXEC mode
VTY interface
console interface
router configuration mode

16.
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 receive frames from attached PCs
to enable the switch to be managed remotely

17.
What is a user trying to determine when issuing a ping 10.1.1.1 command on a PC?
if there is connectivity with the destination device
what type of device is at the destination
if the TCP/IP stack is functioning on the PC without putting traffic on the wire
the path that traffic will take to reach the destination

18.
What command can be used on a Windows PC to see the IP configuration of that computer?
ping
show interfaces
show ip interface brief
ipconfig

19.
Which statement is true about the running configuration file in a Cisco IOS device?
It should be deleted using the erase running-config command.
It is automatically saved when the router reboots.
It affects the operation of the device immediately when modified.
It is stored in NVRAM.

20.
Match the description to the common IOS CLI access method.

21.
Which two characters are allowed as part of the hostname of a Cisco device? (Choose two.)
tab
space
question mark
numbers
underline

22.
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?
Power cycle the device.
Enter CTRL-Z at the privileged mode prompt.
Exit global configuration mode.
Exit enable mode and press Enter.
Reboot the device.

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CCNA 1 R&S ITN Chapter 1 v5.0 Exam Answers 2014

1. Which two Internet solutions provide an always-on, high-bandwidth connection to computers on a LAN? (Choose two.)

cellular
DSL
satellite
cable
dial-up telephone

2. What type of network must a home user access in order to do online shopping?

a local area network
the Internet
an extranet
an intranet

3. What are two functions of intermediary devices on a network? (Choose two.)

They are the primary source and providers of information and services to end devices.
They form the interface between the human network and the underlying communication network.
They direct data along alternate pathways when there is a link failure.
They run applications that support collaboration for business.
They filter the flow of data, based on security settings.

4. Fill in the blank.

The acronym “BYOD” refers to the trend of end users being able to use their personal devices to access the business network and resources.

5. Which description correctly defines a converged network?

a network that allows users to interact directly with each other over multiple channels
a network that is limited to exchanging character-based information
a dedicated network with separate channels for video and voice services
a single network channel capable of delivering multiple communication forms

6.
Drag and drop
Match each characteristic to its corresponding internet conectivity type.

satellite -> Not suited for heavily wooded areas
dialup telephone -> typically has very low bandwidth
DSL -> splits the access line into three signals
cable -> uses coaxial cable as a medium

7.
Drag and drop
Match the form of network communication with its description.

Web pages that groups of people can edit and view together -> wiki
Interactive websites where people created and share user-generated content with friends and family -> Social media
real-time communication of between two or more people -> instant messaging
an audio-based medium that allows people to deliver their recordings to a wide audience -> podcast

8. Drag and drop
Match each definition to the corresponding security goal:

maintaining integrity -> the assurance that the information has not been altered during transmissionensuring confidentiality -> only the intended recipients can access and read the data
ensuring availability -> the assurance of timely and reliable access to data

9. Which statement describes a characteristic of cloud computing?

A business can connect directly to the Internet without the use of an ISP.
Devices can connect to the Internet through existing electrical wiring.
Investment in new infrastructure is required in order to access the cloud.
Applications can be accessed over the Internet through a subscription.

10. Which two Internet connection options do not require that physical cables be run to the building? (Choose two.)

cellular
dialup
satellite
DSL
dedicated leased line

11. What is a characteristic of circuit-switched networks?

A single message can be broken into multiple message blocks that are transmitted through multiple circuits simultaneously.
If all circuits are busy, a new call cannot be placed.
If a circuit fails, the call will be forwarded on a new path.

Circuit-switched networks can dynamically learn and use redundant circuits.

12. Requiring strong, complex passwords is a practice that supports which network security goal?

maintaining communication integrity
ensuring redundancy
ensuring data confidentiality
ensuring reliability of access

13. What two criteria are used to help select network media? (Choose two.)

the distance the media can successfully carry a signal
the environment where the media is to be installed 
the cost of the end devices utilized in the network
the number of intermediary devices installed in the network
the types of data that need to be prioritized

14. Which statement describes a network that supports QoS?

Data sent over the network is not altered in transmission.
The fewest possible devices are affected by a failure.
The network provides predictable levels of service to different types of traffic.
The network should be able to expand to keep up with user demand.

15.

Refer to the exhibit. Which set of devices contains only intermediary devices?

A, B, E, F
A, B, D, G
G, H, I, J
C, D, G, I

16. Which device performs the function of determining the path that messages should take through internetworks?

a web server
a DSL modem
a router
a firewall

17. Which tool provides real-time video and audio communication over the Internet so that businesses can conduct corporate meetings with participants from several remote locations?

wiki
instant messaging
weblog
TelePresence

18. Which two statements about the relationship between LANs and WANs are true? (Choose two.)

Both LANs and WANs connect end devices.
WANs are typically operated through multiple ISPs, but LANs are typically operated by single organizations or individuals.
WANs connect LANs at slower speed bandwidth than LANs connect their internal end devices.
The Internet is a WAN.
WANs must be publicly-owned, but LANs can be owned by either public or private entities.

19. Which three network tools provide the minimum required security protection for home users? (Choose three.)

antivirus software
antispyware software
an intrusion prevention system
powerline networking
a firewall
access control lists

20. Which area of the network would a college IT staff most likely have to redesign as a direct result of many students bringing their own tablets and smartphones to school to access school resources?

intranet
wired LAN
wireless LAN
extranet
wireless WAN

21. Which expression accurately defines the term congestion?

a method of limiting the impact of a hardware or software failure on the network
a set of techniques to manage the utilization of network resources
a state where the demand on the network resources exceeds the available capacity
a measure of the data carrying capacity of the network

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