Network lesson 2

Network type

(According to the geographical locations)

LAN (Local area network)

A LAN is a group of interconnected device that is under the same administrative control. In the past, LAN’s were considered to be small network that existed in a single physical location. Although LAN’s can be as small as a single local network install in a home or small office. Overtype the definition of LAN as evolved to include interconnected local network. Consisting of many hundred of devices installed in multiple buildings and locations.

The important thing to remember is that all of the local networks within a LAN are under one administrative control group that governs the security and access control policies that are in force on the network.

WAN (Wide area network)

A WAN is a network that connects LANs in geographically separated locations. The most common example of a WAN is the Internet. The internet is a large WAN that is composed of millions of interconnected LANs. Telecommunication service providers are used to interconnect these LANs at different locations. 

Network topology

The network topology defines the way in which computers, printers and other devices are connected. A network topology describes the layout of the wire and devices as well as the paths used by data transmission.

Bus topology

Commonly referred to as a linear bus, all the devices on a bus topology are connected by one single cable.

Ring topology

A frame travels around the ring. Stop at each node. If a node wants to transmit data it adds the data as well as the destination address to the frame.

Star topology

The star topology is the most commonly used architecture in Ethernet LANs. When install the star topology reassemble spoke in a bicycle wheel.

Mesh topology

The mesh topology connects all devices to each other for redundancy and fault tolerance. It’s used in WANs to interconnect LANs and for mission critical networks like those used by banks and financial institution.  

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