思科认证考试CCNA考试七十九题(7)[1]

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61. Which of the following about ARP is true? Choose 2

A. It is in the application layerB. It is in the network layerC. It maps mac addresses to ip addressesD. It maps ip addresses to mac addresses

Answer B D. At the same layer are RARP, ICMP, and IP. RARP does what is in answer C.

62. What protocol in the transport layer does not guarantee packet delivery?

A. TCP B. IP C. IPX D. UDP

Answer D. It does a best effort delivery, but is faster than TCP.

63. Which of the following is a class A ip address?

A. 10.14.16.12 B. 127.0.0.1 C. 172.15.42.34 D. 209.123.32.212

Answer A.

64. Which of the following is a class B address?

A. 10.14.16.12 B. 127.0.0.1 C. 172.15.42.34 D. 209.123.32.212

Answer C.

65. Which of the following is a loop back address?

A. 10.14.16.12 B. 127.0.0.1 C. 172.15.42.34 D. 209.123.32.212

Answer B. This is used to test to see if IP is configured and working properly on your pc,

66. Which of the following is a non routable ip address? Choose 2

A. 10.10.0.0 B. 192.168.0.1 C. 10.14.12.12 D. 209.32.242

Answer A B. These are good ip addresses to use behind a fire wall because they will never be addresses that will be used on the internet.

67. Which of the following binary numbers represent 10.12.16.6

A. 00001010.00001100.00010000.00000110B. 00011110.01010000.11001100.00110101C. 01101010.11001010.01000101.01010011D. 10001001.11010101.11111111.00000000

Answer A. D cannot be used at all because you can t have all 1 s or 0 s

68. What does the process of AND in do?

A. It determines the value of an ip addressB. It determines the port that TCP will useC. It determines if two ip addresses are on the same networkD. It decides the ip address subnet

Answer C. You do this by writing out all the ip addresses in binary and match themCisco认证