The following subnetting schemes will be applied to the design of the network that connects the new building:
- Subnet 1: Instructional Computer Labs (6) – These labs will have a total of 132 computers (20 student computers and 1 instructor computer per lab) and servers. Subnet address of this subnet is 10.11.1.0/22. It will have a subnet Mask of 255.255.252.0. There will be 1022 IP addresses available for computers and servers within these labs.
- Subnet 2: Student Computer Lab – This lab will have 30 student computers and a server. Subnet 2: Student Computer Lab – This subnet address is 10.11.4.0/24. It will have a subnet Mask of 255.255.255.0. There will be 254 IP addresses available for computers and servers in the lab.
- Subnet 3: Offices – This subnet will include the various offices in the building, with the exception of the Admission office. One computer will be available for each office. This subnet’s network address will be 10.11.5.0/24 with a subnet Mask of 255.255.255.0. There will be 254 IP addresses available for computers located in offices.
- Subnet 4: Admission office – This office will have 5 computers for staff use. This subnet’s network address will be 10.11.6.0/24 with a subnet mask 255.255.255.0. There will be 254 IP addresses available for computers within this office.
- Subnet 5: Library – This subnet will include the 10 computers for student use and 5 computers for library staff use. This subnet’s network address will be 10.11.7.0/24 with a subnet mask 255.255.255.0. There will be 254 IP addresses available for computers within the library.
- Subnet 6: Classrooms – This subnet will include the 5 lecture classrooms in the building, each with one computer for the instructor’s use. This subnet’s network address will be 10.11.8.0/24 with a subnet mask 255.255.255.0. There will be 254 IP addresses available for computers within the classrooms.
The physical network design:
Topology. A star topology is used to design the network. All devices and computers will need to connect to the same central hub. This central hub or switch will allow for easy maintenance and troubleshooting of the network. It also provides redundancy to network connections.
Network Media: Unshielded Twisted Pair (Category 5e) cabling will connect computers and other devices in the building. It is a widely-used and cost-effective cabling option that can support fast Ethernet or Gigabit Ethernet. All rooms will have cabling, except for the Student Lobby where wireless access is provided.
Unmanaged switches and managed switches are used for network connecting devices. The unmanaged switches can be used where there are fewer devices like the office and classroom, while managed switches can be used in student labs or computer labs to deliver more advanced features like VLANs and Quality of Service (QoS). A managed switch can also be used to manage bandwidth and traffic. The router is used to distribute traffic among the subnets, and provides Internet access through a T-1 link provided by Verizon. It will be located in the server room at the top of the building.