25-04-2014, 11:10 AM
SEMINAR ON BASIC ETHERNET NETWORKING
ETHERNET NETWORKING.PPT (Size: 1.22 MB / Downloads: 16)
PRESENTATION OBJECTIVE
This seminar work is telling us about Ethernet networking and how you can use some network devices to make up a network.
It also enlightens us on how Ethernet cable can be used as a media to connect two or more systems and other devices together in other to share resources, exchange files and printer.
It will tell you about different categories of twisted pair cable and teach you how you can crimp your twisted pair cable with an RJ45 connector. Also you will be enlightened on how to configure a twisted pair cable on straight through, Cross over and Roll over colour coding.
It will also enlighten you on some networking tools and how you can use them to achieve effective networking without having any difficulty.
NETWORKING
What is a Network?
A network can be defined as a group of computers and other devices connected together so as to
be able to exchange data. Each of the devices on the network can be thought of as a node.
The basic ideas in all types of communication are that there must be three ingredients for the communication to be effective. First, there must be two entities referred to as a sender and a receiver. These two must have something they need to share. Second, there must be a medium through which the sharable item is channeled. This is the transmission medium. When you link computers to share files and communicate and do all the things we like to do, you create a network. Networks range in size from the smallest and simplest network- two computers connected together- to the largest and most complex network of all- the Internet.
Star Topology:
The star topology reduces the probability of a network failure by connecting all of the peripheral nodes (computers, etc.) to a central node. when the physical star topology is applied to a logical bus network such as Ethernet, this central node (traditionally a hub) rebroadcasts all transmissions received from any peripheral node to all peripheral nodes on the network, sometimes including the originating node. all peripheral nodes may thus communicate with all others by transmitting to, and receiving from, the central node only. the failure of a transmission line linking any peripheral node to the central node will result in the isolation of that peripheral node from all others, but the remaining peripheral nodes will be unaffected.
Bus Topology:
Bus Topology: In local area networks where bus topology is used, each node is connected to a single cable. Each computer or server is connected to the single bus cable. A signal from the source travels in both directions to all machines connected on the bus cable until it finds the intended recipient. If the machine address does not match the intended address for the data, the machine ignores the data. Alternatively, if the data matches the machine address, the data is accepted. Since the bus topology consists of only one wire, it is rather inexpensive to implement when compared to other topologies.
Metropolitan Area Networks
Between the LAN and WAN, there is also a middle network called the metropolitan area network (MAN) because it covers a slightly wider area than the LAN but not so wide as to be considered a WAN. Civic networks that cover a city or part of a city are a good example of a MAN. MANs are rarely talked about because they are quiet often overshadowed by cousin LAN to the left and cousin WAN to the right. Sites on a MAN are usually interconnected using fibre-optic cable and may carry voice as well as data traffic.