Chapter 6 Computer Networks Pdf Computer Network Transmission Medium For a typical single mode fiber, the velocity of propagation is approximately. v = 2.04 * 108. in this case, a frequency of 193.4 thz corresponds to a wave length of l 12.04 108 = = * 193.4 * 10122 = 1055 nm. therefore, on this fiber,when a wavelength of 1550 nm is cited,the actual wavelength on the fiber is 1055 nm. Transmission medium is the means through which we send our data from one place to another. the first layer (physical layer) of communication networks osi seven layer model is dedicated to the transmission media. factors to be considered while choosing transmission medium 1. transmission rate 2. cost and ease of installation 3.
Networking Pdf Computer Network Transmission Medium Unit 5: transmission media transmission media:a transmission medium can be broadly defined as anything that can carry information from a source to a destination. for example, the transmission medium for two people having a dinner conversation is the air. the air can also be used to convey the message in a smoke signal or semaphore. Social network. mobile network. network of computers. y, banks, hospitals networkscomputer network (figure 10.2) is an interconnection among two or more co. puters or computing devices. such interconnection allows computers to share data an. resources among each other. a basic network may connect a fe. Twisted pair cable. one of the wire used to carry signal and the other as a ground. the receiver uses the difference between the two. if the two wires are parallel, the effect of interference noise and crosstalk is big. twisting the pair of wire balance the effect of unwanted signal and reduce it. 5. 5 1 guided media. guided media, which are those that pr ovide a conduit. from one device to another, include twisted pair cable, coaxial cable, and fiber optic cable. cable specifications. 5.5.
Chapter 1 V7 01 Pdf Computer Network Transmission Medium Twisted pair cable. one of the wire used to carry signal and the other as a ground. the receiver uses the difference between the two. if the two wires are parallel, the effect of interference noise and crosstalk is big. twisting the pair of wire balance the effect of unwanted signal and reduce it. 5. 5 1 guided media. guided media, which are those that pr ovide a conduit. from one device to another, include twisted pair cable, coaxial cable, and fiber optic cable. cable specifications. 5.5. Link layer: 6 17 two types of “links”: §point to point •point to point link between ethernet switch, host •ppp for dial up access §broadcast (shared wire or medium) •old fashioned ethernet •upstream hfc in cable based access network •802.11 wireless lan, 4g 4g. satellite shared wire (e.g.,. Network configurations often called network topologies. node: computer attached to network. each node has a unique network address. three basic lan topologies. ring: connects computers in a loop with cable. star: computers connected to hub (central point) bus: configured like a system bus on a computer (most popular).
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