LAN
Technologies
Presented by Laiba Farheen
Roll no 178
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Introduction
What is LAN
LAN stands for local area network.
It usually connects computers and
peripheral devices in a small geographical
area.
It is the most common type of network.
Networks in school, college and Office building.
Hundred or thousand may be connected
through LAN.
Node
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WLAN(wireless LAN)
WLAN used for home and small office to
connect laptop, printers, smartphone with
a wireless router, which links them to the
internet.
Most common standard IEEE 802.1 also
known as WIFI.
Usually covers an area of 300 feet.
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Features of LAN Technologies
One copy of software can be shared by all users
in a LAN.
System resources like printers and hard disks can
be shared between users.
The data is more secured from being copied and
destroyed.
Data transmission speeds of LAN are typically from
10Mbps to 1000Mbps.
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Types of LAN Technologies
Ethernet
Token
Ring
FDDI
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Ethernet (IEEE 802.3)
Most commonly used network standard in wired networks.
The reason behind its wide usability is that it is inexpensive and easy to
install and manage.
Robert Metcalfe (Electrical engineer)
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Ethernet (IEEE 802.3)
It uses a high-speed network cable and bus topology.
All the computers in Ethernet uses same cable to send and
receive data.
They must follow same rules for communication.
Media access is controlled by a method called (CSMA/CD).
It provide high data rates.
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Ethernet Evolution
Standard
Ethernet
Fast
Ethernet
Gigabit
Ethernet
10 Gigabit
Ethernet
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Types of Ethernet
Standard Ethernet
It supports 10 Mbps transmission speed over twisted-pair cabling with a maximum length of
100 meters.
The older 10 Mbps Ethernet is still used, but such networks do not provide necessary
bandwidth for video applications.
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Fast Ethernet
The fast Ethernet (100BASE-T) is a type of Ethernet that can transfer data at the
rate of 100 Mbps using a twisted-pair cable or a fiber-optic cable.
Coaxial cable
Fiber-optic cable
Twisted-pair cable
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Gigabit Ethernet
The Gigabit Ethernet (1000BASE-T) is capable of transferring data at the rate of
1000 Mbps based on a twisted-pair or a fiber-optic cable, and it is very popular.
The type of twisted-pair cables that support Gigabit Ethernet is CAT 5e cable
and CAT 6 cable (UTP).
CAT 6 cable
CAT 5e cable
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10 Gigabit Ethernet
The 10 Gigabit Ethernet is a latest generation Ethernet capable of transferring
data at a rate of 10 Gbps using CAT 7 Cable (STP) and fiber-optic cable.
CAT 7 cable
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Token Ring (IEEE 802.5)
 It was introduced by IBM in 1984, and standardized in
1989 as IEEE 802.5.
 Ring Topology is used.
 A token is a special frame of 3 bytes.
 Access control method used is Token Passing.
 Token ring is unidirectional.
 Data Rate is used from 4Mbps to 1Gbps.
 Piggybacking acknowledgement is used.
 Monitor station is used.
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 FDDI(Fiber Distributed Data Interface) was developed by
the ANSI in the mid-1980s.
 It uses optical fiber as its physical medium.
 It is based on the token ring protocol.
 It contains two token rings.
 Primary ring is used for transmission of data while
secondary ring is used for backup purpose.
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It provide high data rate of 100 Mbps
It can support thousands of users.
Features
It can extend in range up to 200 KM (124 miles).
It can also be used as a backbone for WAN.
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Thank You
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