ccna interview questions and answers

Part - 11 CCNA Interview Questions and Answers

51 Which addresses are INCORRECTLY paired with their class?

A. 240 - 255, Class D

B. 240 - 255, Class E

C. 224 - 239, Class D

D. 224 - 239, Class E

Ans A & D

Address classes are: 1 to 126, Class A; 128 to 191, Class B, 192 to 223, Class C; 224 to 239, Class D; and 240 to 255, Class E.

52 Which IP Address Class is INCORRECTLY paired with its range of network numbers?

A. Class A addresses include 192.0.0.0 through 223.255.255.0

B. Class A addresses include 1.0.0.0 through 126.0.0.0

C. Class B addresses include 128.0.0.0 through 191.255.0.0

D. Class C addresses include 192.0.0.0 through 223.255.255.0

E. Class D addresses include 224.0.0.0 through 239.255.255.0

Ans A

Class A addresses include 1.0.0.0 through 126.0.0.0 Class B addresses include 128.0.0.0 through 191.255.0.0 Class C addresses include 192.0.0.0 through 223.255.255.0 Class D addresses include 224.0.0.0 through 239.255.255.0

53 Which IP Address Class can have 16 million subnets but support 254 hosts?

A. Class C

B. Class A

C. Class B

D. Class D

Ans A

Possible Subnets IP Address Class Possible Hosts 254 A 16M. 64K B 64K 16M C 254

54 Which IP Address Class can have 64,000 subnets with 64,000 hosts per subnet?

A. Class B

B. Class A

C. Class C

D. Class D

Ans A

IP Address Class Possible Subnets Possible Hosts 254 A 16M 64K B 64K 16M C 254

55 There are two processes to pair MAC address with IP addresses. Which process finds an IP address from a MAC address?

A. RARP

B. ARP

C. RIP

D. IGRP

Ans A

ARP (Address Resolution Protocol) maps an IP address to the MAC address, RARP (Reverse Address Resolution Protocol) maps the MAC address to the IP address. ARP and RARP work at the internet layer of the Internet Model or the network layer of the OSI model.