good effort by these 3 in a short period of time...............................................

2. Definition: A local area network
(LAN) supplies networking capability to a
group of computers in close proximity to
each other such as in an office building, a
school, or a home. A LAN is useful for
sharing resources like files, printers, games
or other applications. A LAN in turn often
connects to other LANs, and to the
Internet or other WAN.

3. A computer network is a collection of
interlinked computer and / or devices
through a communication medium. As
per geographical area networks can
be classified into three types , namely
Local Area Network(LAN)
,Metropolitan Area Network(MAN) and
Wide Area Network(WAN).

4. TYPES OF
NETWORK
LAN MAN WAN

5.  Lan is a localised network. This type of
network is useful when you want to
connect two different departments in a
building. The data transfer rate for
LAN technologies is upto 10 GB/s .
Local Area Network is a high – speed
and fault – tolerant data network .
High transmission rates are possible in
LAN because of short distances
between data network .

10.  The following are the characteristics
and purpose LAN :
 LAN helps in resource sharing for
example , data , software , and
hardware.
 LAN transfers data at a high speed.
 LAN’s reach is limited .
 LAN technology is generally less
expensive than MAN and WAN

15. Networking Basics
Here are some of the fundamental parts of a network:
Network - A network is a group of computers connected together in a way that allows information to
be exchanged between the computers.
Node - A node is anything that is connected to the network. While a node is typically a computer, it
can also be something like a printer or CD-ROM tower.
Segment - A segment is any portion of a network that is separated, by a switch, bridge or router,
from other parts of the network.
Backbone - The backbone is the main cabling of a network that all of the segments connect to.
Typically, the backbone is capable of carrying more information than the individual segments. For
example, each segment may have a transfer rate of 10 Mbps (megabits per second), while the
backbone may operate at 100 Mbps.
Topology - Topology is the way that each node is physically connected to the network (more on
this in the next section).
Local Area Network (LAN) - A LAN is a network of computers that are in the same general physical
location, usually within a building or a campus. If the computers are far apart (such as across town
or in different cities), then a Wide Area Network (WAN) is typically used.
.

16. A wireless LAN (or WLAN, for wireless local area network, sometimes referred
to as LAWN, for local area wireless network) is one in which a mobile user can
connect to a local area network (LAN) through a wireless(radio) connection.
The IEEE 802.11 group of standards specify the technologies for wireless
LANs. 802.11 standards use the Ethernet protocol and CSMA/CA (carrier
sense multiple access with collision avoidance) for path sharing and include
an encryption method, the Wired Equivalent Privacy algorithm.
High-bandwidth allocation for wireless will make possible a relatively low-cost
wiring of classrooms in the United States. A similar frequency allocation has
been made in Europe. Hospitals and businesses are also expected to install
wireless LAN systems where existing LANs are not already in place.
Using technology from the Symbionics Networks, Ltd., a wireless LAN adapter
can be made to fit on a Personal Computer Memory Card Industry Association
(PCMCIA) card for a laptop or notebook computer.