IP Addressing

Question 11

The address of a class B host is to be split into subnets with a 6-bit subnet number. What is the maximum number of subnets and the maximum number of hosts in each subnet?

• 62 subnets and 262142 hosts.
• 64 subnets and 262142 hosts.
• 62 subnets and 1022 hosts.
• 64 subnets and 1024 hosts.

Question 12

The subnet mask for a particular network is 255.255.31.0. Which of the following pairs of IP addresses could belong to this network?

• 172.57.88.62 and 172.56.87.233
• 10.35.28.2 and 10.35.29.4
• 191.203.31.87 and 191.234.31.88
• 128.8.129.43 and 128.8.161.55

Question 13

Host X has IP address 192.168.1.97 and is connected through two routers R1 and R2 to an­other host Y with IP address 192.168.1.80. Router R1 has IP addresses 192.168.1.135 and 192.168.1.110. R2 has IP addresses 192.168.1.67 and 192.168.1.155. The netmask used in the network is 255.255.255.224. 


Given the information above, how many distinct subnets are guaranteed to already exist in the network?

• 6
  

• 3
  

• 2
  

• 1
  

Question 14

Host X has IP address 192.168.1.97 and is connected through two routers R1 and R2 to an­other host Y with IP address 192.168.1.80. Router R1 has IP addresses 192.168.1.135 and 192.168.1.110. R2 has IP addresses 192.168.1.67 and 192.168.1.155. The netmask used in the network is 255.255.255.224.
Which IP address should X configure its gateway as?

• 192.168.1.67
• 192.168.1.110
• 192.168.1.135
• 192.168.1.155

Question 15

A packet addressed to 128.48.64.0 came to a router having routing table as follows. Which interface will it be forwarded to ?

• A
• B
• C
• D

Question 16

In the IPv4 addressing format, the number of networks allowed under Class C addresses is

• 2²⁰
• 2²⁴
• 2¹⁴
• 2²¹

Question 17

An Internet Service Provider (ISP) has the following chunk of CIDR-based IP addresses available with it: 245.248.128.0/20. The ISP wants to give half of this chunk of addresses to Organization A, and a quarter to Organization B, while retaining the remaining with itself. Which of the following is a valid allocation of addresses to A and B?

• 245.248.136.0/21 and 245.248.128.0/22
• 245.248.128.0/21 and 245.248.128.0/22
• 245.248.132.0/22 and 245.248.132.0/21
• 245.248.136.0/24 and 245.248.132.0/21

Question 18

The address of a class B host is to be split into subnets with a 6 - bit subnet number. What is the maximum number of subnets and maximum number of hosts in each subnet?

• 62 subnets and 1022 hosts
• 64 subnets and 1024 hosts
• 62 subnets and 254 hosts
• 64 subnets and 256 hosts

Question 19

The DNS maps the IP address to

• A binary address as strings
• An alphanumeric address
• A hierarchy of domain names
• A hexadecimal address

Question 20

How many bits internet address is assigned to each host on a TCP/IP internet which is used in all communication with the host?

• 16 bits
• 32 bits
• 48 bits
• 64 bits