CABLE_
LAN Technology Cabling
A wireless LAN or WLAN is a wireless local area network, which is the linking of two or more computers without using wires. LAN utilizes spread-spectrum based on radio waves to enable communication between devices in a limited area, also known as the basic service set.
A wireless LAN or WLAN is a wireless local area network, which is the linking of two or more computers without using wires. LAN utilizes spread-spectrum based on radio waves to enable communication between devices in a limited area, also known as the basic service set.
Types Of Cables
ü Unshielded Twiested Pair (UTP) cable
ü Shielded Twisted Pair (STP) cable
ü Coaxial Cable
ü Fiber Optic Cable
ü Wireless LANs
UNSHIELDED TWISTED PAIR (UTP) CABLE
4 pairs of wires inside the jacket
each pair is twisted with a different number of
twisted per inch
5 categories:
category 1 : voice ( telephone wire)
category 2 : data to 4Mbps (local talk)
category 3 : data to 10Mbps (ethernet)
category 4 : data to 20Mbps (16Mbps token ring)
category 5 : data to 100Mbps (fast ethernet)
standard connector is an RJ-45 connector
disadvantage of UTP : may be susceptible to radio
and electrical frequency interference
SHEILDED TWISTED PAIR (STP) CABLE
consist of tw0 individual wires wrapper in a foil
shielding-help provide a more realiable data communication
suitable for environments with electrical
interference.
extra shielding can make the cables quite bulky
COAXIAL CABLE
has a single copper conductor at its center
a plastic layer provides insulation between the
center conductor and a braided metal shield
the metal shield helps to block any outside
interference from fluorescent lights,motors, and other computers.
coaxial cable connector:
Bayone-Neill-Concelman (BNC) connector
different types of adapters are available for BNC
connectors, including:
T-connector
barrel connector
terminator
FIBRE OPTIC
consists of a center glass core surrounded
transmits lightrather than electronic signals
eliminating the problem of electrical interference.
large amount of electrical interference
able to transmit signals over much longer distances
than coaxial and twisted pair.
WIRELESS LANS
Wireless telecommunications is the transfer of information between two or more points that are not physically connected.
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