Syngress - Eleventh Hour Network+ Exam N10-004 Study Guide (11 ...

LAN Technologies and Media Standards 29
■ The backbone cable is terminated at each end using a 50 terminator.
■ The cable has a maximum length of 500 m or 1640 ft per segment.
■ A 10Base5 cable can have no more than 100 taps per cable segment, with
each tap spaced 2.5 m apart.
■ Determining how long a 10Base5 cable could be lengthened using different
segments can be calculated using the 5-4-3 rule. A 10Base5 cable can have
up to five segments, with four repeaters, with only three of the segments
having devices attached to it.
■ A single fault in the cable can bring the entire network down.
■ Each end of the cable must be terminated in a bus topology.
■ RG-59, which is used for broadband transmissions (such as cable television),
is used for 10Base5 networks.
■ RG-6, which is used for broadband, supports higher transmission rates than
RG-59.
■ RG-8 is a 10Base5 cable.
Arcnet:
■ Arcnet is a token bus technology.
■ It may use RG-62 cable.
10BaseT and Beyond
The various types of media standards for twisted-pair and fiber-optic cabling are
shown in Table 2.4.
Table 2.4
Media Standards Using Twisted-Pair and Fiber
Media Standard Cable Type Bandwidth Cable Length
10BaseT UTP (Category 3 or higher) 10 Mbps 100 m
100BaseTX UTP (Category 5 or higher) 100 Mbps 100 m
10BaseFL Fiber optic 10 Mbps 2 km
100BaseFX Fiber optic 100 Mbps 400 m (half-duplex) or 2 km
(full duplex)
1000BaseT UTP (Category 5 or higher) 1 Gbps (1000 Mbps) 100 m
1000BaseSX Fiber optic 1 Gbps (1000 Mbps) 550 m (multimode fiber)
1000BaseLX Fiber optic 1 Gbps (1000 Mbps) 550 m (multimode fiber) or up
to 10 km (single mode fiber)
1000BaseCX Fiber optic 1 Gbps (1000 Mbps) 100 m