Features
of WAN
WAN
is
a network that spread over large geographical area. It uses several
technologies to get that connectivity over vast area. From that connectivity we
can have lot features in WAN. They are,
Circuit
switching
Packet
switching
Lease
line
X.25
Frame
relay
ATM
Circuit switching
 |
| Circuit switching |
The sender and receiver can count on
"owning" the bandwidth allotted to them for as long as they remain
connected.
Packet switching
Packet
switching is a WAN technology in which users
share common carrier resources. Packet-switched describes the type of network
in which relatively small units of data called packets are routed through a
network based on the destination address contained within each packet. Packet
Switching allows the same data path to be shared among many users in the
network.
 | |||||||
| Packet Switching |
The packet passes from exchange to
exchange for delivery through the provider network. This data packets change
the path dynamically. According to the traffic it changes the path.
Lease line
Lease line is used to provide
point-to-point dedicated network connectivity. Analog leased line can provide maximum bandwidth of 9.6 Kbps. Digital leased lines can provide bandwidths: 64
Kbps, 2 Mbps (E1), 8 Mbps (E2), 34 Mbps (E3) ... Internet lease line is used to access internet with dedicate bandwidth.
X.25
X.25 Defines a telephone network for data
communications. It provides
users with WAN connectivity across public data networks (TELENET, TYMNET).
Developed by common carriers to
increase subscription to PDNs. Specification
defines a point-to-point interaction between DTEs and DCEs for remote access
terminals and computers.
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