Consider TCP/IP network in Figure 1 below. a. Show the forwarding table in route

Question

Consider TCP/IP network in Figure 1 below.

a. Show the forwarding table in router D, such that all traffic destined to host H1 is forwarded through interface 2.

b. Write down forwarding table in route A, such that all traffic from H1 destined to H3 is forwarded through interface 3 and all traffic from H2 destined to host H3 is forwarded through interface 4? Explain your answer.

c. Write down forwarding tables at routers A, B, C and D to support communication from H1 to H3 and H2 to H3.

Explanation / Answer

a) Data destined to host H1 is forwarded through interface 2.

b). No. Because as per forwarding rule,it is only based on destination address.

c)

VC Router (through B)

Incoming VC Number

Link

Outgoing VC Number

A

20

3

52

B

52

2

98

D

98

3

7

VC Router (through C)

Incoming VC Number

Link

Outgoing VC Number

A

531

4

981

C

981

2

56

D

56

3

12

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