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WANsA WAN is a network that spans a large geographical area.A WAN is organized to allow each segment or section of a network to be situated in a different building, city, state, or even country. WANs are connected by a variety of communication links. Communication Links
Fiber optic cable Microwave transmitters Satellite links Cable television systems Link Technologies
Digital Packet Switching Analog Connectivity
Slow and inconsistent
Since a leased line is not switched, it also has more quality. Digital Connectivity
All digital lines require a CSU/DSU (Channel Service Unit/Data Service Unit) between the network connection device and the outside line. T1 Lines
Because 24 individual channels, 64 Kbps each, make up a T-1 line, fractional T-1 is usually available. Multiplexing enables several communication streams to travel simultaneously over the same cable segment. Packet Switching Networks
Data delivery does not depend on any single pathway between the origin and the destination. Frame relay is an advanced fast packet variable length, digital, packet switching technology. Provides bandwidth as needed.
Virtual Circuits
Virtual private networks represent temporary or permanent connections across a public network.
Advanced WAN Technologies X.25 provides an interface between public packet switching networks and their customers.
ISDN Integrated Services Digital Network
Frame Relay
ATM Asynchronous Transfer Mode
SONET
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