UMUC CMIT 265: Network Design Proposal: Part 2 - Network Addressing

This document outlines a network design proposal focusing on subnetting for a CMIT 265 assignment. The proposal addresses the need to divide a network address (199.1.2.0) into eight subnets to enhance security, reduce collision and broadcast domains, and improve administrative control. The solution details the use of a "Happy Chart" to determine the subnet mask (255.255.255.224) and the allocation of subnets to various locations, including computer labs and offices, ensuring at least 25 hosts per subnet. The document provides a table detailing the subnet network address, host address range, and broadcast address for each subnet, along with a reference to RFC 950 for subnetting procedures. The design aims to facilitate efficient network troubleshooting by isolating issues within specific subnets.

Network Design Proposal: Part 2
Network Addressing
CMIT 265

A. Subnetting
For this network design we have been assigned the network address 199.1.2.0 which has a
subnet mask of 255.255.255.0. The network design requirements from UMUC requires that
the network address 199.1.2.0 be broken up into 8 subnets. Creating subnets will improve the
security of the network, it will create smaller collision and broadcast domains, and allow for
greater administrative control over the domain [1]. Basically subnetting will help traffic
move along the network with fewer chances of packet collisions. By putting a different
subnet on in each computer lab, in the offices and in the library this will help the
administrators troubleshoot the network. If a problem is reported in a specific computer lab
of office the network administrators will immediately know which subnet is having the
problem.
This network will be broken into 8 subnets with at least 25 host on each subnet. A simple
method for doing this is by using the “Happy Chart”. I added a row to the chart to make it a
little easier.
Subnet Description Required Hosts/computers
Classroom 1 Computer Lab 25 Computers
Classroom 2 Computer Lab 25 Computers
Classroom 3 Computer Lab 25 Computers
Classroom 4 Computer Lab 25 Computers
Classroom 5 Computer Lab 25 Computers
Classroom 6 Computer Lab 25 Computers
Library Computer Lab 25 Computers
Office / Admissions Network 14 Computers
Basically using the chart and the information we have from the network requirements we
know that we need 8 subnets with at least 25 host per subnet. Using the chart, we can see that

if we need 8 subnets than that will give us a new subnet mask of 255.255.255.224. Each
subnet will be broken up in the 32 address sections with the first address being the subnet
network address and the last bit being the subnets broadcast address and every section in
between being a potential host address. For example, the first subnet will have a network
address of 199.1.2.0, and address range of 199.1.2.1 – 199.1.2.30, and a broadcast address of
199.1.2.31. The chart below shows all 8 subnets by location in the building.
Subnet Network Address Host Address Range Broadcast Address
Subnet Mask: 255.255.255.224
Classroom 1 199.1.2.0 199.1.2.1 - 199.1.2.30 199.1.2.31
Classroom 2 199.1.2.32 199.1.2.33- 199.1.2.62 199.1.2.63
Classroom 3 199.1.2.64 199.1.2.65 - 199.1.2.94 199.1.2.95
Classroom 4 199.1.2.96 199.1.2.97 - 199.1.2.126 199.1.2.127
Classroom 5 199.1.2.128 199.1.2.129 - 199.1.2.158 199.1.2.159
Classroom 6 199.1.2.160 199.1.2.161- 199.1.2.190 199.1.2.191
Library Lab 199.1.2.192 199.1.2.193 - 199.1.2.222 199.1.2.223
Office Network 199.1.2.224 199.1.2.225 - 199.1.2.254 199.1.2.255
Reference:
[1] Mogul, J. and J. Postel (1985) Internet Standard Subnetting Procedure, STD 5, RFC 950,
DOI 10.17487/RFC0950, [Online], Avaliable: http://www.rfc-editor.org/info/rfc950