Types of networks 23
Download as PPTX, PDF1 like211 views
A computer network is a collection of interconnected computers that can exchange information through various media, including copper wire and fiber optics. Networks are categorized into Local Area Networks (LAN), Metropolitan Area Networks (MAN), and Wide Area Networks (WAN), each having different ranges, costs, and setups. While networks facilitate resource sharing and communication, they also require skilled maintenance and can be costly to establish.
Types of networks 23
- 2. What is a Computer Network? Collection of autonomous computers interconnected by a single technology is called computer network. Two computers are set to be interconnected if they are able to exchange information. Connection can be through a copper wire, fiber optics, microwaves, infrared or satellite.
- 4. A Local Area Network (LAN) is a collection of networking equipment located geographically close together. E.g. Single room, campus etc. Data transferred in High speed which ranges from 100 Mbps to gigabit for system development and have a low implementation cost. Upper limit: 10 km ; Lower limit: 1 km Twisted pair cable or Co-axial cable connects the plug in cards to form a network. Designed to share resources between PCs and workstation such as hardware or data.
- 5. A work to internet connections would most likely require broadcast network (LAN) with a connection to the internet (packet switched network)
- 7. • Cost reductions through sharing of information and databases, resources and network services. • Increased information exchange between different departments in an organization, or between individuals. • The trend to automate communication and manufacturing process. • Special security measures are needed to stop users from using programs and data that they should not have access to; • Networks are difficult to set up and need to be maintained by skilled technicians. • If the file server develops a serious fault, all the users are affected, rather than just one user in the case of a stand- alone machine.
- 8. There are three topologies of LAN Network Bus Topology Star Topology LAN Topologies Ring Topology
- 11. The metropolitan area network (MAN) is designed to extend over an entire city. It may be a single network such as cable television network available in many cities. A MAN uses distributed queue dual bus. Range: Within 100 km (a city). Bus A Bus B MAN
- 12. It provides a good back bone for a large network and provides greater access to WANs. The dual bus used in MAN helps the transmission of data in both direction simultaneously. A Man usually encompasses several blocks of a city or an entire city. More cable required for a MAN connection from one place to another. It is difficult to make the system secure from hackers and industrial espionage (spying) graphical regions.
- 13. Network that provides long distance transmission of data, voice, image and video information over large geographical areas that may comprise a country, a continent. Range: Beyond 100 km.
- 14. •Covers a large geographical area so long distance businesses can connect on the one network. •Shares software and resources with connecting workstations. •Messages can be sent very quickly to anyone else on the network. These messages can have pictures, sounds, or data included with them (called attachments). •Everyone on the network can use the same data. This avoids problems where some users may have older information than others. •Need a good firewall to restrict outsiders from entering and disrupting the network •Setting up a network can be an expensive, slow and complicated. The bigger the network the more expensive it is. •Once set up, maintaining a network is a full-time job which requires network supervisors and technicians to be employed.
- 17. BASIS LAN MAN WAN Full Form Local Area Network Metropolitan Area Network Wide Area Network Range A communication network linking a number of stations in same local area. Range is 1 to 10 km This network shares the characteristics of packet broadcasting networks. Range is100 km A communication network distinguished from a Local Area Network. Range is Beyond 100 km Media Used Uses guided media Uses guided as well as unguided media Uses unguided media Speed A high speed i.e. 100kbps to 100mbps Optimized for a large geographical area than LAN. Long distance communications, which may or may not be provided by public packet network. Cost cheaper costly expensive Equipment needed NIC, switch and hub Modem and router Microwave, radio, infra- red laser protocols Attached Resource computer network (ARCNET), Token ring Frame relay and asynchronous transfer mode(ATM) ATM, FDDI, SMDS