ECP2056 chapter 3 part B_stud_ver

ECP2056 chapter 3 part B_stud_ver - ECP 2056 :...

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ECP 2056 : DATACOMMUNICATIONS AND COMPUTER NETWORKING  3.3 Circuit switched data networks 3.4 Packet-switched data networks CHAPTER 3 : Characteristics of Data Communication Networks
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3.3) Packet-switched data  networks 3.4) Circuit switched data  networks ECP 2056 : DATACOMMUNICATIONS AND COMPUTER NETWORKING
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CHAPTER 3 Characteristics of Data Communication Networks: Packet-switched data networks & Circuit switched data  networks - Covers large geographical areas (towns, cities, states, countries,. .)  or usually across an area of multiple km radius. - LAN depends on their own hardware or equipment but WANs may  use public, leased, or private communication equipments  (combined). - Usually consists of several interconnected switching nodes The nodes provide a switching facility that will move the data from one node  to another until they reach their destination What is WAN?
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CHAPTER 3 Characteristics of Data Communication Networks: Packet-switched data networks & Circuit switched data  networks - Long distance transmission is typically done over  a network of switching devices called  nodes - Nodes do not concern with the content of data - Data routed by being switched from node to  node - End devices are called  stations e.g. Computer, terminal, phone, etc Switching Networks
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5 Figure 1 Switched network CHAPTER 3 Characteristics of Data Communication Networks: Packet-switched data networks & Circuit switched data  networks
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CHAPTER 3 Characteristics of Data Communication Networks: Packet-switched data networks & Circuit switched data  networks Nodes - Nodes may connect to other nodes only (e.g. node 5), or  to stations and other nodes (e.g. node 6) - Node-to-node links usually multiplexed (FDM or TDM) - Some redundant connections (alternative paths) are  desirable for reliability - Two general types of switching technologies Circuit switching Packet switching
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CHAPTER 3 Characteristics of Data Communication Networks: Packet-switched data networks & Circuit switched data  networks Figure 2 Taxonomy of switched networks
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8 CIRCUIT-SWITCHED NETWORKS CIRCUIT-SWITCHED NETWORKS A circuit-switched network consists of a set of switches A circuit-switched network consists of a set of switches connected by physical links. A connection between two connected by physical links. A connection between two stations is a dedicated path made of one or more links. stations is a dedicated path made of one or more links. However, each connection uses only one dedicated channel However, each connection uses only one dedicated channel on each link. Each link is normally divided into n channels by on each link. Each link is normally divided into n channels by using FDM or TDM. using FDM or TDM.
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This note was uploaded on 08/27/2009 for the course FET data com taught by Professor Hi during the Spring '09 term at Multimedia University, Cyberjaya.

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ECP2056 chapter 3 part B_stud_ver - ECP 2056 :...

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