Types Of Network 1 Computer Network A network

Types Of Network 1

Computer Network: A network consists of two or more computers that are linked in order to share resources, exchange files, or allow electronic communications. The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams 2

Need of Computer Network: File sharing Resource sharing Communication and collaboration Remote access Data protection 3

Devices Use To Connect Network: Routers Gateways Repeaters Bridges Hub Modem 4

Types Of Network: Local Area Network Wide Area Network Metropolitan Area Network 5

Local Area Network: A local area network (LAN) is a group of computers and associated devices that share a common communications line or wireless link. Typically, connected devices share the resources of a single processor or server within a small geographic area. . A local area network may serve as few as two or three users or as many as thousands of users. 6

Wide Area Network: The WAN is a communications network that makes use of existing technology to connect local computer networks into a larger working network that may cover both national and international locations. 7

Metropolitan Area Network (MAN): A metropolitan area network (MAN) is a network that interconnects users with computer resources in a geographic area or region larger than that covered by even a large local area network but smaller than the area covered by a wide area network (WAN). It is also used to mean the interconnection of several local area networks by bridging them with backbone lines 8

Network Topologies Network Topology – Maps of how the physical or logical paths of network devices connect. The three major topologies are star, ring, and bus. Star Topology – Most common Ethernet network topology where each device connects to a central hub or switch. Hub – A device used with the Universal Serial Bus or in a star network topology that allows multiple device connections. Switch – In star networks, a Layer 2 central controlling device. A switch looks at each data frame as it comes through each port. Ring Topology – Network that is physically wired like a star network but, logically in a ring; passes control from one device to the next in a continuous fashion using a special data packet called a token. Used in Token Ring networks. Bus Topology – Network wherein all devices connect to a single cable. If the cable fails, the network is down. Mesh Topology – Network where all devices connect to each other by cabling to provide link redundancy for maximum fault tolerance. Most likely in WANs. 9

Hub/Switch Network Topologies 10

Star Topology Network Topologies 11

Logical Ring Topology Network Topologies 12

Bus Topology Network Topologies 13

Network Topologies 14

Differentiate between the three types of computer networks

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