TAILIEUCHUNG - Ebook Ethernet: The definitive guide - Phần 2

Part 1 of the book serial ebook Pc Underground to part 2 of you will continue to learn about relevant issues such as: multi-segment configuration guidelines, building your ethernet system, structured cabling, twisted-pair cables and connectors, fiber optic cables and connectors,. Invite you to consult. | I In this chapter Collision Domain Basic Repea Operation Repeater Buying Guide 10 Mbps Repeaters 100 Mbps Repeaters 1000 Mbps Gigabit Ethernet Repeater Repeater Management A repeater is a device that allows you to build multi-segment half-duplex Ethernet systems. Repeaters do this by linking the segments together making the whole system function as though it were a single large segment. Individual half-duplex media segments are of limited length to ensure acceptable signal timing and signal quality for the entire length of the segment. When linking segments together repeaters act upon the Ethernet signals regenerating the signal and restoring the timing. This ensures that each frame makes it through the entire Ethernet system intact and that every station in the Ethernet system will receive the frame correctly. The configuration guidelines that apply to all types of half-duplex systems are described in Chapter 13 Multi-Segment Configuration Guidelines. Repeaters have been widely used to build extended Ethernet systems for years. However many network designs today are based on switching hubs to take advantage of the extra bandwidth and other capabilities that switching hubs can provide. The cost of switching hubs has rapidly decreased in recent years and therefore many network designers use switching hubs instead of repeaters for all new network installations and for upgrades from older systems. Switching hubs are described in Chapter 18 Ethernet Switching Hubs. A repeater is intended to provide a simple and inexpensive way to link two or more network segments. By using repeaters you can build large half-duplex Ethernet systems that can span the maximum distance allowed in the configuration guidelines. Repeaters are not stations and do not require an addressed Ethernet interface to operate. However an Ethernet interface may be included to provide communication with management software on the repeater. Page 265 The earliest repeaters were simple two-port devices that

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