Consider the network below. Suppose that this network is a datagram network. Show the forwarding table in router D, such that all traffic destined to host H1 is forwarded through interface 1. а. b. Suppose that this network is a datagram network. Can you write down a forwarding table in router A, such that all traffic from H1 destined to host H3 is forwarded through interface 3, while all traffic from H2 destined to host H3 is forwarded through interface 4? (Hint: this is a trick question.) Now suppose that this network is a virtual circuit network and that there is one ongoing call between H1 and H3, and another ongoing call between H2 and H3. Write down a forwarding table in router A, such that all traffic from H1 destined to host H3 is forwarded through interface 4, while all traffic from H2 destined to host H3 is forwarded through interface 3. с. d. Assuming the same scenario as (c), write down the forwarding tables in nodes B, C, and D. Assuming the same scenario as (c) and if the router C is down and not reachable, write down the forwarding table on B е.

Consider the network below. Suppose that this network is a datagram network. Show the forwarding table in router D, such that all traffic destined to host H1 is forwarded through interface 1. а. b. Suppose that this network is a datagram network. Can you write down a forwarding table in router A, such that all traffic from H1 destined to host H3 is forwarded through interface 3, while all traffic from H2 destined to host H3 is forwarded through interface 4? (Hint: this is a trick question.) Now suppose that this network is a virtual circuit network and that there is one ongoing call between H1 and H3, and another ongoing call between H2 and H3. Write down a forwarding table in router A, such that all traffic from H1 destined to host H3 is forwarded through interface 4, while all traffic from H2 destined to host H3 is forwarded through interface 3. с. d. Assuming the same scenario as (c), write down the forwarding tables in nodes B, C, and D. Assuming the same scenario as (c) and if the router C is down and not reachable, write down the forwarding table on B е.

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Question

I need help with the last two parts, d & e. Answer for a, b, and c were provided earlier.

### Network Exercise

Consider the network below.

**a.** Suppose that this network is a datagram network. Show the forwarding table in router D, such that all traffic destined to host H1 is forwarded through interface 1.

**b.** Suppose that this network is a datagram network. Can you write down a forwarding table in router A, such that all traffic from H1 destined to host H3 is forwarded through interface 3, while all traffic from H2 destined to host H3 is forwarded through interface 4? (Hint: this is a trick question.)

**c.** Now suppose that this network is a virtual circuit network and that there is one ongoing call between H1 and H3, and another ongoing call between H2 and H3. Write down a forwarding table in router A, such that all traffic from H1 destined to host H3 is forwarded through interface 4, while all traffic from H2 destined to host H3 is forwarded through interface 3.

**d.** Assuming the same scenario as (c), write down the forwarding tables in nodes B, C, and D.

**e.** Assuming the same scenario as (c) and if the router C is down and not reachable, write down the forwarding table on B.

---

### Network Diagram Description

The diagram shows a network with the following components:

- **Hosts:** H1, H2, and H3.
- **Routers:** A, B, C, and D.
- **Connections:**
- H1 is connected to router A.
- H2 is connected to router A.
- Router A is connected to Router B (interface 1), Router D (interface 2), and Router C (interface 3).
- Router B is connected to Router A (interface 1) and Router D (interface 2).
- Router C is connected to Router A (interface 1) and Router D (interface 2).
- Router D is connected to Router B (interface 1), Router C (interface 2), Router A (interface 3), and Host H3.

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