Difference between LAN and WAN

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26 Οκτ 2013 (πριν από 3 χρόνια και 9 μήνες)

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Difference between LAN and WAN


The

other difference between LAN and WAN, is the speed of the network The maximum speed of a LAN
can be 1000 megabits per second, while the speed of a WAN can go up to 150 megabits per second.
This means the speed of a WAN, is one
-
tenth of the speed of a LAN.

A WAN is usually slower because it
has lower bandwidth.


Computers in a LAN can share a printer, if they are all in the same LAN. On the other hand, a WAN
cannot share a printer, so a computer in one country cannot use a printer in another country. A LAN

does
not need a dedicated computer to direct traffic to and from the Internet, unlike a WAN that needs a
special
-
purpose computer, whose only purpose is to send and receive data from the Internet.


Another LAN vs. WAN comparison is the cost of the networ
k. A WAN is more expensive than a LAN. It is
easier to expand a LAN than a WAN. The equipment needed for a LAN is a network interface card (NIC),
a switch and a hub. On the other hand, the equipment needed to connect a WAN to the Internet is a
modem and a
router. The modem may be a cable modem or a DSL modem that is connected to a wall
jack, while the router should be configured so that it can handle the packets traveling between the WAN
and the internet


In LAN vs. WAN, there is a difference in the network
ing standard used. A LAN uses the Ethernet
standard, while a WAN uses the T1 standard. Before Ethernet, the protocols used for LAN were Attached
Resource Computer Network (ARCNET) and Token Ring. The protocols used for WAN are Frame Relay
and Asynchronous
Transfer Mode (ATM). Another protocol for WAN is Packet over SONET/SDH (PoS),
where SONET stands for Synchronous Optical Networking and SDH stands for Synchronous Digital
Hierarchy. The first WAN protocol was X.25, while an advanced WAN protocol is Multipr
otocol Label
Switching (MPLS). The hardware in a LAN is connected with 10Base
-
T cable connectors, while a WAN is
connected via leased lines or satellites.


Here is an explanation of LANs and WANs. A LAN is easy to set up, as you need to slip the NIC into
the
PCI slot (for desktop computers) PCMCIA slot (for laptops). You also need to install the driver for the NIC.
The NIC can be connected to the network using the RJ45 port.


On the other hand, a WAN is very difficult to set up. There is often an applianc
e to optimize the WAN.
There is also a device to cache WAN data, so workers in the branch office can quickly access documents.
The router also has Quality of Service (QoS) built in, so that it gives priority to certain kinds of traffic.


There are various

topologies available in LAN and WAN networking. The most common topologies in
LAN and WAN networks are ring and star. The ring topology is a network in which every node (every
computer) is connected to exactly two other nodes. The star topology is a netwo
rk in which all the nodes
(called leaf nodes or peripheral nodes) are connected to a central node