Question

CIT 1615 Lab Assignment

187.63.200.0 /24

Objective: You have been hired to design a subnetting scheme using VLSM to meet the requirements of the network shown. This assignment will guide you through each step. Fill in each blank and then complete the table that is at the end of this document. Subnet

Address Requirement

Faculty

25 hosts

Admin

12 hosts

Student

96 hosts

Guest

3 hosts

Serial to Gateway Router

2 hosts

Step 1: We will determine all of the network addresses based on host requirements shown in the table above. We always want to start with the subnet that has the largest host requirement. What is the name of this subnet?

(a) Subnet Name:_________________________   (b) Number of Required Hosts:_________

The network address of this subnet will be the original network address, but it will have a different subnet mask (prefix length). So we need to determine this. What is the best fitting prefix length and subnet mask for the number of hosts required of this subnet?

(c)Subnet Address (copy original network address):________________________

(d) Prefix Length:________________    (e) Subnet Mask:_______________________

Choosing a prefix length will break the address space into equal blocks of a certain size – the size depending on the prefix length. Given the prefix length you just chose, what size blocks is the address space broken into?

(f) Blocks of size _________

Step 2: We need to identify the next largest subnet.

(a) Subnet Name:_________________________   (b) Number of Required Hosts:_________

The prefix length you chose in Step 1 will determine the network address for this subnet. Add the block size from the previous step (1.f) to the network address in the previous step (1.c) to determine this subnet address.

(c) Subnet Address:______________________

This subnet may have a different prefix length than the previous subnet. What is the best fitting prefix length and subnet mask for the number of host required of this subnet?

(d) Prefix Length:________________    (e) Subnet Mask:_______________________

What size blocks did this prefix length break the address space into?

(f) Blocks of size _________

Step 3: We need to identify the next largest subnet.

(a) Subnet Name:_________________________   (b) Number of Required Hosts:_________

The prefix length you chose in Step 2 will determine the network address for this subnet. Add the block size from the previous step (2.f) to the network address in the previous step (2.c) to determine this subnet address.

(c) Subnet Address:______________________

This subnet may have a different prefix length than the previous subnet. What is the best fitting prefix length and subnet mask for the number of host required of this subnet?

(d) Prefix Length:________________    (e) Subnet Mask:_______________________

What size blocks did this prefix length break the address space into?

(f) Blocks of size _________

Step 4: We need to identify the next largest subnet.

(a) Subnet Name:_________________________   (b) Number of Required Hosts:_________

The prefix length you chose in Step 3 will determine the network address for this subnet. Add the block size from the previous step (3.f) to the network address in the previous step (3.c) to determine this subnet address.

(c) Subnet Address:______________________

This subnet may have a different prefix length than the previous subnet. What is the best fitting prefix length and subnet mask for the number of host required of this subnet?

(d) Prefix Length:________________    (e) Subnet Mask:_______________________

What size blocks did this prefix length break the address space into?

(f) Blocks of size _________ 

Step 5: Finally we need a network address for the serial connection. These connections will always require two addresses, which means a /30 prefix length.

Subnet Name: Serial Connection         Number of Required Hosts: 2

The prefix length you chose in Step 4 will determine the network address for this subnet. Add the block size from the previous step (4.f) to the network address in the previous step (4.c) to determine this subnet address.

(a) Subnet Address:______________________

Prefix Length:/30    (b) Subnet Mask:_______________________

What size blocks did this prefix length break the address space into?

(c) Blocks of size _________

Step 6: Now that you have determined all of the network addresses and prefix lengths, complete the table below. Remember that the broadcast address will be the last possible address in a subnet. Or it will be one less than the next network address. The first usable host address is one more than the network address, and the last usable host address is one less than the broadcast address.

Network Address

Subnet Mask

Broadcast Address

Usable Host Range

First Subnet

Second Subnet

Third Subnet

Fourth Subnet

Serial Connection

Answer 1

Major Network: 187.63.200.0/24
Available IP addresses in major network: 254

Subnet Name	Needed Size	Allocated Size	Address	Mask	Dec Mask	Assignable Range	Broadcast
Student	96	126	187.63.200.0	/25	255.255.255.128	187.63.200.1 - 187.63.200.126	187.63.200.127
Faculty	25	30	187.63.200.128	/27	255.255.255.224	187.63.200.129 - 187.63.200.158	187.63.200.159
Admin	12	14	187.63.200.160	/28	255.255.255.240	187.63.200.161 - 187.63.200.174	187.63.200.175
Guest	3	6	187.63.200.176	/29	255.255.255.248	187.63.200.177 - 187.63.200.182	187.63.200.183
Serial to Gateway Router	2	2	187.63.200.184	/30	255.255.255.252	187.63.200.185 - 187.63.200.186	187.63.200.187

Step 1
**********

(a) Subnet Name: Student
(b) Number of Required Hosts: 96
(c)Subnet Address (copy original network address):255.255.255.0  
(d) Prefix Length:/25
(e) Subnet Mask:255.255.255.128
(f) Blocks of size 128

We are allowed to do only 4 exercise out of any given.

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