Question

CIDR -A router has the following (CIDR) entries in its routing table:

 

<span style="font-size:12.0pt; font-family:&quot;Times New Roman&quot;,serif;mso-ascii-theme-font:major-bidi;mso-hansi-theme-font: major-bidi;mso-bidi-theme-font:major-bidi;color:black">Destination Gateway</span>        Next hop

170.46.56.0/21                Interface 1

170.46.48.0/20                 Interface 3

176.53.40.0/22                Router 1

default gateway               Router 2

1. For each of the following IP address, what does the router do if packets with the following addresses arrive?

(a) 170.46.63.10/21

(b) 170.46.67.14/21

(c) 145.46.52.2 /22

(d) 176.53.40.7 /24

(e) 176.53.56.7/24

A router has the following (CIDR) entries in its routing table: Destination Gateway

2. What is the relationship between the “gateway” and “interface” fields?

Answer 1

The given CIDR prefix means the number of available hosts on the network.

For the given IP address -

(a) 170.46.63.10/21

(b) 170.46.67.14/21

(c) 145.46.52.2 /22

(d) 176.53.40.7 /24

(e) 176.53.56.7/24

A) available hosts - 21

B) available hosts = 21

C) available hosts = 22

D) available hosts = 24

E) available hosts = 24

The relation between the gateway and the interface field are given below -

A gateway is a node (router) in the computer network and gateway address is a router interface connected to the local network that sends the packets out of the network.