4. LAN
A LAN is a computer network limited to a small
area such as an office building, university, or
even a residential home. Most mid to large-sized
businesses today use LANs, which makes it easy
for employees to share information.
5. WAN
A network that connects two or more local-area
networks over a potentially large geographic
distance.
6. MAN
A metropolitan area network is a network that
connects two or more local area networks or
campus area networks together but does not
extend beyond the boundaries of the immediate
town/city.
7. TOPOLOGIES
A topology describes the configuration of a
communication network.
A topology describes the physical and the logical
interconnection between the different nodes of a
network.
8. TYPES OF NETWORK TOPOLOGIES
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RING TOPOLOGY
STAR TOPOLOGY
BUS TOPOLOGY
MESH TOPOLOGY
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Ring Topology
A configuration that connects all nodes in a closed loop on which
messages travel in one direction .
Star Topology
A configuration that centers around one node to which all others
are connected and through which all messages are sent .
Bus Topology
All nodes are connected to a single communication line that carries
messages in both directions .
Mesh Topology
In Mesh Topology each node is connected to every other node.
12. BENEFITS OF THE OSI MODEL
Reduces complexity
Standardizes interfaces
Facilitates modular engineering
Ensures interoperable technology
Simplifies teaching and learning
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14. SCOPE OF NETWORKING
• All IT/ITES based companies require Networking
• In software Industry also there are Networking
Programmers
• Not only IT companies need network all of them need
network to reduce workload