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Thứ Hai, ngày 10 tháng 9 năm 2012

DHomesb Final Exam CCNA Discovery 1 4.0 2012 100% Take Assessment – DHomesb Final Exam – CCNA Discovery: Networking for Home and Small Businesses (Version 4.0) – Answers – 2011 – 2012



1. Which three statements are true about local and network applications? (Choose three.)
A local application is loaded in a local computer and can be accessed by a remote computer on the network.
A network application is loaded in a local computer and accessed from a remote computer.
A local application is loaded in a local computer and accessed only by the local computer.
A network application is loaded in a local computer and accessed only by the local computer.
An example of a local application is e-mail.
An example of a network application is instant messaging.
2. A wireless DHCP client cannot connect to the Internet through a Linksys integrated router. When you type ipconfig on the host, no IP address, subnet mask, or default gateway shows. What are two of the first things you will check? (Choose two.)
SSID
if the wireless client is configured for DHCP
the cable between client and integrated router
the firewall configuration on the integrated router
if the correct default gateway is configured on the client
if the correct default gateway is configured on the integrated router
3. Refer to the graphic. Assume that the command output is from a wireless DHCP client that is connected to a Linksys integrated router. What can be deduced from the output?
The wireless connection is good.
The WEP key or SSID needs to be checked.
The DHCP configuration on the router needs to be checked.
The wireless NIC driver or the NIC itself needs to be reinstalled.
4. What measurement is commonly used to describe communication speed when transferring data?
bps
cps
Hz
MB
5. What is an accurate description of network devices in the distribution layer?
They are designed to interconnect individual hosts.
They are designed to interconnect multiple companies.
They are designed to interconnect local network segments.
They are designed to switch data packets as fast as possible.
6. When acting as a DHCP server, an integrated router can provide what three types of information to a client? (Choose three.)
physical address
MAC address
default gateway
static IP address
dynamic IP address
DNS server address
7. Where do ISPs get the public addresses that they assign to end users?
ISPs create the addresses themselves.
ISPs are assigned addresses through the RFC.
ISPs obtain their addresses automatically.
ISPs obtain address blocks from registry organizations.
8. Refer to the graphic. What is the effect of setting the security mode to WEP on the Linksys integrated router?
It identifies the wireless LAN.
It allows the access point to inform clients of its presence.
It translates IP addresses into easy-to-remember domain names.
It encrypts data between the wireless client and the access point.
It ensures that only authorized users are allowed access to the WLAN.
It translates an internal address or group of addresses into an outside, public address.
9. When are leased lines typically used?
when low bandwidth is required
for home and small business connectivity
when a dedicated digital data line is necessary
as a less expensive option to cable and DSL modem service
10. Which wireless protocol is used for encryption?
EAP
Open
PSK
WEP
11. The area covered by a single AP is known as what?
ad-hoc network
basic service set
independent basic service set
extended service set
distribution system
12. Which installation option should be chosen when the current operating system is too damaged to work properly?
upgrade
multi-boot
clean install
virtualization
13. What layer is the first point of entry for a host into the network?
core layer
access layer
network layer
distribution layer
14. What two commands can be used to form a new binding if client information does not agree with the DHCP client table? (Choose two.)
ipconfig /release
ipconfig /all
ipconfig /flushdns
ipconfig /renew
ipconfig
15. What are two advantages of purchasing a custom-built computer? (Choose two.)
usually a lower cost
no waiting period for assembly
user can specify higher performance components
supports higher-end graphics and gaming applications
fewer components to replace
16. What information within a data packet does a router use, by default, to make forwarding decisions?
the destination MAC address
the destination IP address
the destination host name
the destination service requested
17. What is a service pack?
an access policy
an agreement between a company and a vendor
a piece of code created to fix one specific problem
a collection of patches and updates released by a vendor
a small piece of software designed specifically for security issues
18. What is an ISP?
It is a standards body that develops cabling and wiring standards for networking.
It is a protocol that establishes how computers within a local network communicate.
It is an organization that allows individuals and businesses to connect to the Internet.
It is a networking device that combines the functionality of several different networking devices in one.
19. Which two statements correctly describe Media Access Control (MAC) addresses? (Choose two.)
MAC addresses are used to identify a specific NIC.
MAC addresses are physical addresses.
MAC addresses contain a network number and unique host identification.
MAC addresses are always assigned to network devices by a network administrator.
MAC addresses can be dynamically assigned.
20. What is the name for the contract between a customer and an ISP that specifies requirements for uptime and service response time?
DSL
IAB
NAP
SLA
21. What are two ways that a user can interact with an operating system shell? (Choose two.)
CLI
OS
GUI
NIC
kernel
22. Select the connection that would require a straight-through cable.
a switch to a hub
a router to a switch
a switch to a switch
a router to a router
23. Choose the option that shows the correct sequence of steps in the encapsulation of TCP/IP data that is passed from a source to a destination host?
A. converts data to bits for transmission
B. packages the data for end to end transport
C. adds the data-link header and trailer
D. adds the network IP address to the header of the frame
A,B,C,D
A,C,D,B
B,D,C,A
B,C,D,A
D,C,B,A
24. What is specified by the network number in an IP address?
the network to which the host belongs
the physical identity of the computer on the network
the node of the subnetwork which is being addressed
the broadcast identity of subnetwork
25. Refer to the graphic. What is the purpose of assigning a Network Name of Academy?
It identifies the wireless LAN.
It translates IP addresses into easy-to-remember domain names.
It encrypts data between the wireless client and the access point.
It allows access to the AP configuration GUI by name rather than address.
It translates an internal address or group of addresses into an outside, public address.
26. Which of the following statements best describes DNS?
DNS servers are used to map an IP address to a physical address.
DNS servers are used to map a name to an IP address.
DNS servers are used to configure logical address information for host computers.
DNS servers are used to translate from private addresses to public addresses.
27. Which of the following are the address ranges of the private IP addresses? (Choose three.)
10.0.0.0 to 10.255.255.255
200.100.50.0 to 200.100.25.255
150.150.0.0 to 150.150.255.255
172.16.0.0 to 172.31.255.255
192.168.0.0 to 192.168.255.255
127.16.0.0 to 127.31.255.255
28. Which protocol is used to transfer files among network devices and perform file-management functions?
DNS
FTP
HTML
HTTP
29. Select three statements that correctly describe how DHCP services may be provided. (Choose three.)
An integrated router provides IP configurations for most ISPs.
An integrated router can act as both DHCP server and DHCP client.
A home PC using a static IP address obtained that address from a DHCP server.
Most home network integrated routers receive an IP configuration directly from their ISP.
A variety of devices can act as DHCP servers, as long as they run DHCP service software.
A home PC is required by standards to obtain an IP address and default gateway from a DHCP server (usually the ISP).
30. Refer to the graphic. Based on the information that is shown, what statement is true?
This configuration would be commonly found in an ad hoc wireless network.
Any wireless client that is attached to this access point would have the same IP address and SSID.
All wireless devices that are connected to this access point must have an assigned SSID of Academy.
In addition to accepting wireless client requests, this access point must connect to the wired network.
31. Identify two causes of physical layer network problems. (Choose two.)
logical addressing issues
improperly terminated cables
cables plugged into wrong ports
incorrect MAC address assigned
packets received out of sequence
incorrect subnet mask on an interface
32. Which part of the electromagnetic spectrum is commonly used to exchange data between a PDA and a computer?
FM
radar
infrared
ultraviolet
33. Which of the following are transport layer protocols of the TCP/IP model? (Choose two.)
FTP
UDP
SMTP
TFTP
TCP
34. For the second time in a week, workstations on a LAN are not able to log into the server. The technician fixed the problem the first time, but cannot remember the steps taken to solve it. What aspect of the troubleshooting process has the technician neglected?
identifying the problem
asking end-users questions
documenting the troubleshooting process
using structured techniques to solve a problem
35. What action will a router take when it receives a frame with a broadcast MAC address?
It will not forward the frame to another network.
It forwards the frame back to the sending host with its IP address as a response.
It forwards the frame out of all interfaces except the interface where the frame was received.
It forwards the frame back out the receiving interface to insure all hosts on the local network receive it.
36. A network host is accessing a web server. What two protocols are most likely being used as the TCP/IP model application layer protocol and the internetwork layer protocol? (Choose two.)
IP
FTP
TCP
DHCP
HTTP
37. Which statement is true concerning stateful packet inspection?
Access is permitted based on IP addresses of the source and destination devices.
Access is permitted based on the MAC addresses of the source and destination devices.
Access is permitted only if the type of application that is attempting to reach the internal host is allowed.
Access is permitted only if it is a legitimate response to a request from an internal host.
38. What does the term “attenuation” mean in data communication?
loss of signal strength as distance increases
time for a signal to reach its destination
leakage of signals from one cable pair to another
strengthening of a signal by a networking device
39. What is the default subnet mask for a class B address?
255.0.0.0
255.255.0.0
255.255.255.0
255.255.255.255
40. Refer to the graphic. Based on the configuration information that is shown, which three types of 802.11 networks are allowed access to the WLAN? (Choose three.)
802.11a
802.11b
802.11e
802.11g
802.11n
802.11x
41. Within a local network, which two items must be unique on a computer for it to successfully connect to the network? (Choose two.)
IP address
subnet mask
computer name
default gateway address
operating system version
42. When considering the purchase of a new operating system, what is meant by “Total Cost of Ownership?”
applications and support costs
hardware and support costs
hardware and software costs
hardware, software, and support costs
hardware, operating system, and applications costs
43. A computer joins the network and announces itself to all hosts on the LAN. What type of message does the computer send out?
broadcast
simulcast
multicast
unicast
44. Refer to the graphic. What feature can be installed on the Linksys integrated router to convert private IP addresses to Internet-routable addresses?
authentication
DHCP
encryption
firewall
NAT
WEP
45. When terminating UTP cabling, why is it important to untwist only a small amount of each wire pair?
minimizes crosstalk
makes installation faster
ensures wires are in correct order
makes it easier to fit wires into connector
46. A host sent a message that all other hosts on the local network received and processed. What type of domain are all these hosts a part of?
local domain
multicast domain
collision domain
broadcast domain
47. Your school network blocks all websites related to online gaming. What type of security policy is being applied?
identification and authentication
remote access
acceptable use
incident handling
48. Refer to the graphic. Assume that the exhibited output is from a host that is connected to a Linksys integrated router. What is one of the first things you should check?
IP address on the host
IP address on the router
subnet mask on the host
default gateway on the host
link status LED on the front of the router
49. The transmit pins are disconnected and only the receive pins are used.
The transmit pins are disconnected and only the receive pins are used.
The transmit pins on one device are connected to the transmit pins on the other device.
The receive pins on one device are connected to the receive pins on the other device.
The transmit pins on one device are connected to the receive pins on the other device.
50. What are two examples of storage peripheral devices? (Choose two.)
printer
flash drive
headphones
external DVD
barcode reader
51. What are the two possible values for a digital bit? (Choose two.)
0
1
A
F
#
9
52. What type of computer would most likely use a docking station?
laptop
server
desktop
mainframe
workstation