ccna 1 capítulo 8 pdf

ccna 1 capítulo 8 pdf.Because of the long history of the networking world, there are a large number of different terms. The term "leased line" means that the business using the private line does not own the line, they just pay a monthly fee for the service. Typically, users rent this service from the telephone office or the telephone company. However, many people today use the generic term "service provider" to refer to a company that provides WAN connectivity in any form, including Internet services. Table 12-2 gives some of the names so that you can understand the different terms used in actual network work.Table 12-2 Common Names for Leased LinesName MeaningLeased circuit, line The terms line and circuit have the same meaning when circuit refers generally to an electronic line between two endpointsSerial link, serial line Link and line also have the same meaning. The premise is that bits are circulated serially through the serial port of a routerPoint-to-point link, point-to-point line Generally refers to a topology extension (two points only) between two points (some of the newer leased lines can support devices larger than two)T1 Leased line for data transmission at 1.544 Mbit/sWAN link, link Generic term, no technology involved(1) b (2) b (3) ac (4) c (5) ad (6) bd (7) cdPhysical Structure of a Leased Line To establish a leased line, the telephone company must establish some sort of physical transmission path between the routers at each end of the link. When laying out the physical line, the