You are to design a LAN for the campus layout shown below: You may use the follo

Question

You are to design a LAN for the campus layout shown below:

You may use the following equipment:

- UTP cable

- Fibre-optic Cable pair

- NIC-UTP port

- 2-Port Repeater

- Multiport Fibre Repeater (6 fibre ports)

- 2-Port Bridge (any combination of UTP and fibre)

- As many 36 port 100M bit Ethernet switching hubs as you need

- Switching Hub ~6 fibre ports, 24 UTP ports

- Patch panels and racks for mounting as needed

- File Servers – with NOS (max. 30 users per server)

Your work must meet the following design requirements:

- Visit some electronics shops or their Web sites to find out the lowest price for each of the components listed above, and use a table to summarize your findings.

- Each department must have access to the resources of all other departments.

- The traffic generated by users of one department cannot affect another department's LAN, unless they are accessing a resource on that other department's LAN.

- A file server can support only 30 users. File servers may not be shared by multiple departments.

- All repeaters, bridges, patch panels, and hubs must reside in the wiring closets (WCs).

Provide a diagram for your design. Also provide a list of the equipment you use (with quantities) and the total cost of the LAN.

You must justify your design.

Explanation / Answer

Available facilities

With your computer connected to the College network, the following facilities will be available to you:

Access to the Internet via the Cambridge University Data Network (CUDN), which also provides access to a range of departmental services and e-mail facilities.

Access to your file space on the UCS DS-Filestore, and to the College's DS-Print laser printers.

What you will need

No matter what type of computer you are connecting to the network, you will need the following items:

A computer name and IP address

You must apply for these by filling in an application form and returning it to the Computer Support Office. You will then receive a pink notification form, which specifies all the information you will need to connect your computer to the network.

You must NOT attempt to connect your computer to the network before you receive the pink notification form; any attempt to do so is liable to cause problems on the network.

A network interface card

This needs to be capable of running at 10Mbps or 100Mbps. The card MUST have an RJ45-style socket for connection to the network. Some modern laptops do not have ethernet ports on them, so you must purchase a suitable adapter to be able to use the wired connection – for example USB to ethernet or Thunderbolt to ethernet for the most recent Apple MacBooks.

A patch cable

This needs to be a straight-through, Category 5e or 6, UTP cable, with an RJ45-style plug on each end. One end goes to your ethernet adapter, the other end goes to the network socket on the wall in your room. If you have two similar-looking sockets on your wall, you need to use the socket marked "D" for Data, or with a computer icon. The other socket is marked "V" for Voice, or with a telephone icon. If the sockets are not labelled, you will normally need to use the left-hand one. The Sheppard and Wolfson Flats have sockets available in multiple areas of each flat; usually the left hand one of each pair should be used.

Please note: the College sells both ethernet cards and patch cables. You may wish to use your own card and cable, but if so please be sure to use a good quality cable. Poor quality cables are likely cause you problems, and they may also cause problems for others using the network. Note that the prices charged on the High Street for network cables will usually be much higher than the amount charged by the Computing Support Office.

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