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11 Cards in this Set

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Local Area Network (LAN)
covers a limited geographic distance, such as an office, office building, or a group of buildings within close proximity.
WIDE AREA NETWORK (WAN)
covers large geographic distances, such as a state, a country, or even the entire world.
The Internet is a WAN.
A WAN is often a collection of connected LANs.
CLIENT/SERVER NETWORK
is a network that contains one or more host computers (called “servers”) that provide some type of service to the other computers (called “clients”).
Client/server networks are the emerging blueprint for all networks today.
NETWORK TOPOLOGY
refers to the physical arrangement of computers in a network. Network topologies include bus, ring, and star
BUS TOPOLOGY
all computers are connected to a single cable over which all communications travel.
STAR TOPOLOGY
- has a central hub from which all other computers radiate.
Network Server
A computer system that serves as a central repository of data and programs shared by users in a network.
Wired
TWISTED-PAIR CABLE - two insulated copper wires twisted in a spiral.

FIBER OPTIC CABLE - uses a very thin glass or plastic fiber through which pulses of light travel.
Wireless Media
INFRARED uses a red light (below the visibility of the human eye) to transmit information (short distance).

TERRESTRIAL MICROWAVES transmit high-speed radio signals in a path between relay stations (dish-shaped antenna) (medium distance).

SATELLITES are basically microwave transmission systems in space (long distance).
PEER-TO-PEER NETWORK
treats all computers equally and is used primarily in small networks.
Bandwith
The capacity for information flow is called It is usually measured in bits/second.

Twisted Wire 500 BPS to 10 MBPS
Microwave 256 KBPS to 100 MBPS
Satellite 246 KBPS to 100 MBPS
Fiber-optic 500 KBPS to 10 GBPS