June 16, 2011

Vincent HernandezKhim NavaltaKathryn Bismonte

CASE PROJECTS

Preliminary Design Step:

Question 1. How many employees you had in your company? Is all of them had a peripheral devices (computer, printer)?

Question 2. Can you describe your office situation?

Question 3. What kind of network card you had in your computer? (“This is important to know because some network topology is not compatible to all Network cards”)

Report about Network Topology:

When two or more than two computers are connected with each other using any medium in such a way that they communicate with each other and share their resources then it is called computer network and a physical interconnection of a variety of elements including in a network is called topology. Topology is the structure or arrangement of a network which may be physical or logical. Physical topology included devices, location and installation of cables etc and Logical topology included fact that where and how data transmit from one location to another location in a network.

The tree primary Local Area Network (LAN) topologies are bus, star and ring.

Topology for the Network Design

The topology we will recommend is RING, in this topology all computers are situated in the form of a ring and each computer connected within two neighbor’s computer by the means of communication. In Ring topology, data cannot travel in both directions as links are not bidirectional but are unidirectional. There is a repeater exist between a node and the network. It means that when one node wants to send data onto to the network then repeater is used for this purpose. A token is sued for sending data as if one node want to send data then it has to get token first. Token always circulate in ring.

We recommend this topology because it is very common in small office like your firm. And as you said in your office situation, that the computers are located close to each other that’s why the ring topology set-up is easy. Your office will also save money because you can use one printer rather than using eight printers and you are not required to have a central server for the management of this topology. It’s also the right solution for your firm seeking stability and consistency of data and shared resources.

Devices for network Connectivity

June 16, 2011

In your firm I recommend to use token ring networks, it is a technology in a local area network protocol which resides at the data link layer (DLL) of the OSI model. It uses a special three-byte frame called a token that travels around the ring. Token-possession grants the possessor permission to transmit on the medium. Token ring frames travel completely around the loop. This kind of technology uses a twisted-pair cable.

A token ring networks use a special type of hub called a multistation access unit (MAU). The MAU receives each incoming signal through one port and transmits it out through each of the others in turn. This process is not performed simultaneously as with an Ethernet hub, but one at a time.

Networking advantages for the firm

As I said in the previous discussion, the ring topology doesn’t require a central server that’s why you will save money. Ring topology has some benefits such as equal access to everyone and the transformation of data at very high speed. And the major advantage of this technology is that the signal is low degeneration because each workstation is responsible for regenerating and boosting the signal. With the other topologies, as the signal travels the wire, it gets weaker and weaker as a result of outside interference; eventually it becomes unreadable if the destination system is too far away.

A ring topology is considered to be very reliable. Due to information being passed around the ring one way, it is easier to manage than a bus topology. Bus topologies use one major backbone to broadcast information to every device on that backbone, regardless of whether that device has asked for the information or not. In a star topology, all devices are hooked into one singular piece of networking equipment. A ring Topology handles a heavier load than a star topology because each device is hooked into another, and the load of information is spread between devices, instead of congregating into one single piece of networking equipment.