a) Consider a router that has dynamically learnt and constructed the routing table shown below.

Question
Subnet Network Address Subnet Mask Next Hop
195.194.96.0 /25 Interface 0
195.194.96.128 /25 Interface 1
195.194.45.0 /25 Router 3
208.6.155.0 /26 Router 4
Default Router 65

 

The router can deliver packets directly over interfaces 0 and Interface 1, or it can forward packets to routers Router 3, Router 4 or Router 5.

Describe what the router does with a packet addressed to each of the following destinations.

i) 195.194.96.22

ii) 195.195.96.253

iii) 195.194.45.88

iv) 195.194.45.133

v) 195.194.45.255

vi) 12.23.45.67

vii) 241.10.20.30

b) Explain why packets addressed to any of the following IPv4 addresses will not be routed to the Internet and will be discarded at the Internet boundary. Explain what the significance of these addresses is;

10.0.0.0/8

172.16.0.0/12

192.167.0.0/16

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