Week 5
Refering to figure 1 below: You are the network administrator for the network depicted in the diagram. You have been assigned the address space 10.1.16.0/21 to create the LANs you need, and the 172.16.1.0/28 space for your WAN links.
LAN: 10.1.16.0/21
WAN: 172.16.1.0/28
LAN Subnets
Begin by creating and assigning the LAN subnets you will use. In order to make the most efficient use of your address space you should start by creating the subnet needed for the LAN with the most hosts and then work you down to the smallest LAN.
Using the address space 10.1.16.0/21, create subnets for the LANs shown in the diagram and fill in the table 1 below. Notice that the first 7 subnets are all basically the same size and all subnets are all factors of 2 (remember 2n-2 where n is the number of host bits tells you the subnet size). Also remember for the most efficient addressing you should use the smallest size subnet that provides you the needed number of hosts.
TABLE 1: (Questions 1-8)
Question
LAN
Subnet Address
Subnet Mask
1.
R1 LAN S3
10.1.16.0
255.255.255.0
2.
R1 LAN S4
10.1.17.0
255.255.255.0
3.
R2 LAN S5
10.1.18.0
255.255.255.0
4.
R2 LAN S6
10.1.19.0
255.255.255.0
5.
R3 LAN S7
10.1.20.0
255.255.255.0
6.
R3 LAN S8
10.1.21.0
255.255.255.0
7.
HQ LAN S1
10.1.22.0
255.255.255.0
8.
HQ LAN S2
10.1.23.0
255.255.255.0
WAN Subnets
For the WAN links, you have been assigned the 172.16.1.0/28 address space. Fill in the subnets in Table 2 below by subnetting the assigned WAN space.
TABLE 2: (Questions 9-11)
Question
WAN
Subnet Address
Subnet Mask 9.
HQ-R1
172.16.1.0
255.255.255.252
10.
HQ-R2
172.16.1.8
255.255.255.252
11.
HQ-R3
172.16.1.8
255.255.255.252
Assign addresses
Use Table 3 below to document the IP addresses for the indicated interfaces following the guidelines below:
1. Assign the first IP address for all LANs to the router interface.
2.