Computer Network

• Intranet is a private network within an organization that resembles the internet
• Extranet is a private network that connects more than one organization
• Internet is a public network, a worldwide collection of networks
• Client-Server Architecture:

  • Devices communicate to other devices through a central computer (server)
• Peer-to-Peer Architecture:

  • Any node can provide a service and send a request for a service from another node on the network
• Hybrid Architecture is a composition of two different types of elements
• Personal Area Network is a computer used for communications among computers and different information technological devices close to one person
• Local Area Network connects computers and devices in a limited geographical area such as a home, school, office buildings, or closely positioned group of buildings
• Metropolitan Area Network is a high-speed network that connects local area networks in a Metropolitan Area such as a city or town and handles bulk of communication activity across the region
• Wide Area Network covers a large geographic area such as a city, country, or even intercontinental distances
• Network Topology is the pattern of interconnection of nodes in a network
• Bus Topology is popular for data networks
• Star Topology connects nodes over a network using a central control unit called the hub
• Ring Topology connects the nodes on a network through a point-to-point connection
• Mesh Topology has each node connected to more than one node
• Tree Topology is created where the nodes are connected in a hierarchical manner
• Hybrid Topology can be a combination of two or more basic topologies