1-3 Media and Topologies

Posted February 22nd, 2007 by admin

1.3 Specify the characteristics (For example: speed,length, topology, and cable type) of the following cable standards:

	Cable Type	Maximum Length	Max. Speed	Topology
10Base-T	Category 3 or above unshielded twisted-pair (UTP)	100 m	10 Mbps	Star, using either simple repeater hubs or Ethernet switches
10BASE-FL	Fiber-optic	Segment may be up to 2,000 meters in length if only 10BASE-FL equipment is used on the segment.		Fiber optic link segments a star topology
100Base-TX	Category 5 UTP	100 m	100 Mbps	Star, using either simple repeater hubs or Ethernet switches
100Base-FX	Fiber-optic	412 meters (Half-Duplex) 2000 m (full-duplex)	100 Mbps (200 Mb/s full-duplex mode)	Star (often only point-to-point)
1000Base-LX	Fiber-optic	440 m (multimode) 5000 m (singlemode)	1 Gbps	Star, using buffered distributor hub (or point-to-point)
1000Base-T	Category 5	100 m	1 Gbps	Star
100BASE-TX
1000BASE-CX	Copper cable (balanced shielded twisted pair).	maximum of 25m per segment	1 Gbps	Obsolete standard for 1GB Ethernet over short distances. Succeeded by 1000BASE-T
10GBASE-T	unshielded twisted pair cables Category 5e or Category 6 or Category 7 cables. Augmented Category 6 cable is being developed which will to reduce crosstalk between the cables	100m	A standard proposed by the IEEE 802 committee to provide 10 Gigabit/second	Proposal for 10GBASE-T calls will use the conventional RJ-45 used for ethernet LANs. IEEE P802.3an (10GBASE-T) Task Force
10 GBASE-SR	multimode fiber Two strands of 62.5/125 (30m)or 50/125 (300m) micron core fiber cable	From 30m up to 300 meters depending on the type and quality of the multimode fiber.	10 Gbps
10 GBASE-LR	single-mode fiber	10 kilometers	10 Gbps
10 GBASE-ER	Fiber optic cable	40 kilometers	10 Gbps