Lan Topologies

Lan Topologies

LAN Topologies
Lord Bones
IT240
Jan 01,
University of Phoenix - AXIA College

LAN Topologies
With this assignment I will discuss some topologies of a LAN as requested by questions 11, 12, and 13, chapter three from the textbook Local Area Networks. A “LAN (Local Area Network) topology is the appearance or layout of a network” (Regan, 2006). There are two forms of topologies of a network, namely, the physical- and logical topology with each its own types of topologies. The physical topology is what someone can see with his or her own eyes, i.e. a workstation, servers, cables, etc. while the logical topology is the dataflow of the network, how the data is moving from one point to another (Regan, 2006). In the following I will describe two physical topology types and one logical topology type, following the scenarios in the question’s mentioned above.
In the first scenario there are four servers in the network with no hub present. The first (A) server is connected to the second (B), third (C), and the fourth (D). The second is connected to the third and fourth, while the third is connected to the fourth. (See figure 1.) This type of physical topology is called a Mesh Topology. A Mesh Topology is a topology where “every computer is linked to every other computer” (Regan, 2006). With this type of topology there is no hub or a similar device present. Also this type is difficult to install and certainly when it has to be reconfigured when a new computer is added to the network and the amount of cables increases dramatically. In the above example there are six cables, but when a server is added the amount of cables increases to nine cables. As you can see it is not a very efficient layout for a LAN network, but there are other topologies that are easier to install and to expand, one of them is the Star Topology which be discussed in the second scenario.


Server A Server B

 
Server C Server D
Figure 1: Mesh Topology
In the second...

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