Sunday, January 16, 2011

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DHomesb Final Exam - CCNA Discovery: Networking for Home and Small Businesses (Version 4.0) REV 2

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1
How does a crossover cable connect two routers?
    It connects the pins that are used for transmitting on one router to the pins that are used for receiving on the other router.

2   
Which statement correctly describes the function of ARP?
    ARP is used by hosts to resolve an IP address to a MAC address for the destination host.

3   
Which installation option should be chosen when the current operating system is too damaged to work properly?
    clean install

4   
A network engineer wants to represent confidential data in binary format. What are the two possible values that the engineer can use? (Choose two.)
    0
5   
Why does a router maintain an ARP table?
    to determine addressing of frames for delivery on a local network segment

6   
What is the purpose of TCP?
    to manage data links and physical network transmissions

7   
Which three address ranges can be used to depict private IP addresses? (Choose three.)
    10.0.0.0 to 10.0.0.255
    172.16.1.0 to 172.16.1.255
    192.168.22.0 to 192.168.22.255

8   
Which two causes of networking problems are related to the physical layer? (Choose two.)
    disconnected cables
    improper operation of cooling fans

9   

Refer to the exhibit. PC1 sends a data packet to PC4. When the router forwards the data out Fa0/1, what destination MAC address will the router place in the frame?
    0200.545D.25F7

10   
What are two ways that a user can interact with an operating system shell? (Choose two.)
    CLI
    GUI

11   
What is a service pack?
    a collection of patches and updates released by a vendor

12   
What component of a personal computer is responsible for the processing of all data?
    CPU

13   
What is a major characteristic of asymmetric Internet service?
    Download speeds are faster than upload speeds.

14   
What is the function of CSMA/CA in a WLAN?
    It assures that clients are connected to the correct WLAN.

15   
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
16
What are two best practices that are used when configuring a small home WLAN? (Choose two.)
    the encryption of the SSID
    the use of pre-shared keys

17   
Which portion of the packet does a router use to forward the packet to the destination?
    destination IP address

18   
For devices that do not autosense, which connection requires a crossover cable?
    PC port to PC port

19   
A user in a small office is unable to connect to the Internet. The user examines the physical connections to the ISR, a Linksys WRT300N, and notices a solid green LED on the port that is wired to the computer. What does the LED indicate about the current state of the port?
    The computer is plugged in but no traffic is flowing.

20   
Refer to the graphic. Based on the information that is shown, what statement is true?
    All wireless devices that are connected to this access point must have an assigned SSID of Academy.

21   
Refer to the exhibit. A home network is configured with the information in the graphic. A user tries to manually create a new connection to the network using the SSID Ciscoclass. However, a connection cannot be made. What could be the problem?
    The SSID is case-sensitive.

22   
How do ISPs obtain public IP addresses?
    They obtain the addresses from the RFC.

23   
What two pieces of information should a help desk technician document while troubleshooting connectivity issues with an end user? (Choose two.)
    if the user can ping the default gateway address
    whether the PC uses dynamic or static IP addressing

24   
Refer to the exhibit. A network technician is statically assigning an IP address to a PC. The default gateway is correct. What would be a valid IP address to assign to the host?
    128.107.255.1

25   
Refer to the exhibit. With NAT overload configured on router R2, what is the inside global host address for packets that travel from host H1 to the Internet?
    192.168.1.254

26   
A network technician is required to provide access to the Internet for a large company. What is needed to accomplish this task?
    ISP

27   
Which type of computer has an integrated mouse?
    laptop

28   
An administrator is troubleshooting a network problem that involves the inability of users to reach Internet sites. During troubleshooting, the administrator is able to successfully ping web sites by their IP address, but pings to domain names are unsuccessful. Which service is most likely at fault?
    DNS

29   
What is the purpose of pop-up blocker software?
    It prevents the display of advertisement windows.
30   
When would infrared be used to connect network devices?
    when synchronizing a PC with a PDA that is in line of sight
31
Which two protocols are responsible for encrypting data on a wireless network? (Choose two.)
    WEP
    WPA

32   
Which type of attack involves flooding a server port with SYN messages?
    data manipulation

33   
Which of the following are transport layer protocols of the TCP/IP model? (Choose two.)
    UDP
    TCP

34   
A home user is looking for an ISP connection that provides high speed digital transmission over regular phone lines. What ISP connection type should be used?
    dial-up

35   
Which picture shows a USB port on a PC?
(UCAN ANSWER IT BY YOURSELF)
36   
What type of message is sent to a specific group of hosts?
    unicast

37   
What is an advantage of purchasing a custom-built computer?
    The cost is lower compared to a computer that has been preassembled.

38   
Which device is often configured to act as both a DHCP client and a DHCP server?
    wireless-enabled laptop

39   

Refer to the exhibit. Assume that the exhibited output is from a host that is connected to a Linksys integrated router. What is the first thing that should be checked while using a bottom-up troubleshooting approach?
    the IP address on the router

40   
Which two automatic addressing assignments are supported by DHCP? (Choose two.)
    subnet mask
    default gateway address

41   
A local PC has the correct configuration that is required to access the network. A ping command that is sourced at the PC does not receive a response from a remote device. Which operating system command might be used to determine where the connection failed?
    tracert

42   
What is a weakness of WEP that is solved by WPA?
    WEP uses a fixed length key for every connection whereas WPA uses a different key length for each connection.

43   
Which Windows PC command line utility can be used to discover the path that a packet takes to reach a destination?
    tracert

44   
What is the purpose of the ipconfig /release command?
    It forces the client to clear all the MAC address to IP address associations it has learned.

45   
Refer to the exhibit. Which option correctly represents the encapsulation of a packet that is sent by Host1 to the web server?
   
DESTINATION IP ADDRESS : 172.16.1.1
SOURCE IP ADDRESS : 172.16.1.10
DESTINATION PORT : 80
SOURCE PORT : 1048
46
When would a LAN switch use flooding to forward a frame?
    when retransmissions are required after a collision

47   
Which type of network supports DHCP and DNS services for network users in a network domain?
    client/server

48   
What is the default subnet mask for an IP address of 64.100.19.14?
    255.0.0.0

49   
Two switches are interconnected in the same wiring closet. What type of cable is typically used for this connection?
    UTP crossover

50   
Which two statements are true about local applications? (Choose two.)
    They are stored on the local hard disk.
    They run on the computer where they are installed.

51   
Which IP address type is intended for a specific host?
    unicast

52   
What are two examples of peripheral output devices? (Choose two.)
    headphones
    printer

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