IP Addressing for The Network

 IP Addressing and Subnetting

Referring to the introduction we have the network details:

Size: 25 employees + devices (workstations, WAPs, servers, etc)

    1. Marketing:                             8 people, ~ 12 hosts (including printers, AP and buffer)

    2. Finance:                                3 people, ~ 6 hosts

    3. Development:                       10 people, ~ 14 hosts

    4. Administration/HR:                 2 people, ~ 4 hosts

    5. Executive/Management:        2 people, ~ 4 hosts 

The network will be using private IP addresses and will be divided using VLAN as it would be the most cost effective and efficient method. This network will also be divided by VLSM as it will better utilize the IP addresses and allows for future scalability.

Why VLSM?

    1. Efficient IP usage minimizes unused IPs compared to FLSM.

    2. Scalability, easier to allocate new subnets from unused IPs.

    3. Optimized network, departments get only as many IPs as they need.

Subnet Allocation

Subnets will be allocated from 192.168.1.0/24 starting with the largest department to ensure proper fit.

Subnet Calculation:

• Marketing (12 hosts): requires /28 (16 total IPs, 14 usable)
• Development (14 hosts): requires /28 (16 total IPs, 14 usable)
• Finance (6 hosts): requires /29 (8 total IPs, 14 usable)
• Administration (4 hosts): requires /29 (8 total, 6 usable)
• Executive/Management (4 hosts): requires /29 (8 total, 6 usable)

Subnetting Table VLSM

Department	Subnet Address	Subnet Mask	Usable IP Range	Broadcast Address	Default Gateway
Marketing	192.168.1.0/28	255.255.255.240	192.168.1.1 - 192.168.1.14	192.168.1.15	192.168.1.1
Development	192.168.1.16/28	255.255.255.240	192.168.1.17 - 192.168.1.30	192.168.1.31	192.168.1.17
Finance	192.168.1.32/29	255.255.255.248	192.168.1.33 - 192.168.1.38	192.168.1.39	192.168.1.33
Administration/HR	192.168.1.40/29	255.255.255.248	192.168.1.41 - 192.168.1.46	192.168.1.47	192.168.1.41
Executive/Management	192.168.1.48/29	255.255.255.248	192.168.1.49 - 192.168.1.54	192.168.1.55	192.168.1.49

IP Usage

Total IPs allocated:

Marketing: 16 IPs.

Development: 16 IPs

Finance: 8 IPs

Administration: 8 IPs

Executive/Management: 8 IPs

Total: 56 IPs used from 192.168.1.0/24 range.

Remaining IPs: 198 IP Addresses Available (192.168.1.56 - 192.68.1.254) for future growth