Network: A computer network is a system for communication between computers.Components of Networks: People. Hard ware. Software. connectivity. Procedure.
Local Area Network:A local area network is data communicationsystem in a limited geographical area. Like ahome, office, or small group of buildings
Metro-Politan Area Network:A Metro-politan area network is a networkdesigned to extend over an entire city.
Wide Area Network: A wide area network provides long distance transmission of data over a large geographical areas Comprising a country,a continent or the whole world.The most well-known example of a WAN is the Internet.
Network Topology:. The logical layout of the cables and devices that connects the nodes of a computer.
Types of Topologies: Star Topology. Bus Topology. Ring Topology. Mesh topology. Tree Topology. Hybrid Topology.
Bus Topology:All devices are connected to a centralcable, called the bus or backbone.
Star Topology: All devices are connected to a central hub.Nodes communicate across the network by passing data through the hub.
Ring Topology:All devices are connected to one another inthe shape of a closed loop, so that eachdevice is connected directly to two otherdevices, one on either side of it.
Mesh Topology:In a true mesh topology every node has aconnection to every other node in the network
Tree Topology:Tree topologies integrate multiple startopologies together onto a bus.
Hybrid Topology:A hybrid topology is always produced whentwo different basic network topologies areconnected. Two common examples for Hybridnetwork are: star ring network and star busnetwork.
Linking devices:A type of linking mechanism needed tointerconnect at least two computers.They are usedto create a network. For example Cables,Switchesor Hubs.