Chapter 16

Question 1

What is source independence

Answer 1

Packets are source independent and they only care about destination, not source.

Question 2

What is routing table

Answer 2

Every packet switch build a table inside and that table decides the next hope. This table is known as routing table

Question 3

What is routing

Answer 3

The process of forwarding the packets from one hop to the next is known as routing.

Question 4

Does all same destinations on same switch have same next hop

Answer 4

Yes

Question 5

What are interior packet switches

Answer 5

Switches employed inside a network. It is because it is just used to increase the capacity of WAN. It will connect to other packet switches to increase capacity but it will not connect to other computers.

Question 6

What are exterior packet switches

Answer 6

These are opposite to interior packet switches and computer attach to them directly.

Question 7

Does every type of packet switch forward packets and need routing table

Answer 7

Yes

Question 8

What are 2 things adhere by every packet switch

Answer 8

Universal Routing: Next hop for each possible destination

Optimal routes: Next hop must be on shortest path to destination.

Question 9

Why we do graph a WAN

Answer 9

To map routes and we represent every packet switch in graph as node

Question 10

What are edges in graph

Answer 10

routing table

Question 11

How can we find routes in graph

Answer 11

By graph algorithm

Question 12

What is default route

Answer 12

We can replace the duplicate routes by single default route and thus save time