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.


Subnet Table
QuestionAnswer
23What is the HQ subnet (address/mask)?
24What is the R1 subnet (address/mask)?
25What is the R2 subnet (address/mask)?
26What is the subnet for the HQ to R1 WAN (address/mask)?
27What is the subnet for the HQ to R2 WAN (address/mask)?


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

DeviceInterfaceAddressMask
HQ RouterFa0/02839
S0/0/02940
S0/0/13041
R1 RouterFa0/03142
S0/0/03343
R2 RouterFa0/13444
S0/0/03545
PC1Ethernet36
PC2Ethernet37
PC5Ethernet38



What subnets do you have left available for future use?
46.  
47.  
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 =
49. PC2 =
50. PC5 =