NETW 204: Assignment 2 (50 points)

Each answer is worth 1 point each, 50 questions = 50 total points. Type answers in the appropriate cell; text will automatically wrap. Post your completed assignment to the dropbox.

NAME

Distance Vector Routing Protocols

Question Answer

1 What does RIP stand for? Routing Information Protocol

2 What metric does RIP use for Path Selection? Hop Count

3 If the metric used by RIP exceeds this value for a route it is considered unreachable, effectively making this value appear to be infinity to RIP? 16

4 How often does RIP send updates by default (update timer)? Every 30 seconds

5 What are the main differences between RIPv1 and RIPv2? The main difference between RIPv1 and RIPv2 is classless routing.

6 What is convergence and why is it important? automated mapping and integration of information technology environments available to a user

7 Is RIP considered to be a fast or slow converging protocol? slow

For the simple 3 router network (Figure 1), fill in the information that would be in each router’s routing table once the network has converged (see example in Chapter 4, pages 192-193).

Figure 1

Questions 8-22 (15 points – first one provided)

R1 HQ R3

Network Interfac e Hop Networ k Interfac e Hop Networ k Interfac e Hop

172.15.0.0 Fa0/0 0 172.16.0.0 S0/0/0 0 172.18.0.0 S0/0/0 0

172.16.0.0 S0/0/0 0 172.18.0.0 S0/0/1 0 172.19.0.0 Fa0/0 0

172.18.0.0 S0/0/0 1 172.15.0.0 S0/0/0 1 172.16.0.0 S0/0/0 1

172.19.0.0 Fa0/0 2 172.19.0.0 S0/0/1 1 172.15.0.0 S0/0/0 2

Subnetting and Assigning Addresses

Figure 2. Addressing Design Scenario

You are the network administration for the small network in Figure 2. It consists of your headquarters location with a LAN with 60 hosts, remote office R1 with 10 hosts, and remote office R2 with 30 hosts. You have been assigned the address space 192.168.3.0/25. From this space you will need to create the subnets for each of the sites on your network and the two WAN links. Once you find the subnets assign addresses to the Routers interfaces and PCs using the following guidelines: Assign the first address from LAN subnets to the router interface connected to that LAN. Assign the second IP address in the LAN subnet to the PC on the LAN. Assign the first Address from WAN subnets to the HQ router end of the WAN link and the second address to the remote router interface. Use the steps below to help you work through it.

Create the subnets:

Address space: 192.168.3.0/25

Write it out in binary form identifying the host and network then use the space below in table as a scratch pad to help you in subnetting as needed. Remember to be efficient you usually want to start by creating the largest subnet you need first and then continue subnetting to find the smaller subnets in succession.

The following scratchpad can be used to show work (for partial credit) in completing the subnet table below.

Network bits Host bits

Subnet Table

Question Answer

23 What is the HQ subnet (address/mask)? 192.168.3.0/26

24 What is the R1 subnet (address/mask)? 192.168.3.64/27

25 What is the R2 subnet (address/mask)? 192.168.3.96/28

26 What is the subnet for the HQ to R1 WAN (address/mask)? 192.168.3.65/27

27 What is the subnet for the HQ to R2 WAN (address/mask)? 192.168.3.97/28

Fill in the address and subnet mask for the device interfaces in the table below using the assignment rules described above.

Device Interface Address Mask

HQ Router Fa0/0 28 192.168.3.1 39 26

S0/0/0 29 192.168.3.2 40 26

S0/0/1 30 192.168.3.3 41 26

R1 Router Fa0/0 31 192.168.3.65 42 27

S0/0/0 33 192.168.3.66 43 27

R2 Router Fa0/1 34 192.168.3.97 44 27

S0/0/0 35 192.168.3.98 45 27

PC1 Ethernet 36 192.168.3.4

PC2 Ethernet 37 192.168.3.99

PC5 Ethernet 38 192.168.3.67

What subnets do you have left available for future use?

46. 192.168.3.112/28

47. 192.168.3.112/28

PC’s on a LAN need to have a default gateway configured that identifies the next hop IP address for packets leaving the network. This is the address of the router interface on the LAN. Based on this what address will be assigned as the default gateway on the following PCs.

48. PC1 = 192.168.3.4

49. PC2 = 192.168.3.99

50. PC5 = 192.168.3.67