All about
COMPUTER
NETWORKS
What is Computer
Network?
Computer Network means an interconnection
of autonomous (standalone) computers for
information exchange. The connecting media
could be a copper wire, optical fibre,
microwave or satellite.
2
Types of computer Networking
Local Area Network (LAN) –LAN or Local Area Network connects network
devices in such a way that personal computers and workstations can share
data, tools, and program.
Metropolitan Area Network (MAN) –MAN or Metropolitan area Network covers
a larger area than that of a LAN and smaller area as compared to WAN.
Wide Area Network (WAN) –WAN or Wide Area Network is a computer
network that extends over a large geographical area.
Personal area network (PAN) is the interconnection of information
technology devices within the range of an individual person.
4
Network Topologies
5
Mesh Topology:
In mesh topology, every device is connected to
another device via particular channel.
Bus Topology:
Bus topology is a network type in which every
computer and network device is connected to
single cable.
Star Topology:
In star topology, all the devices are connected to
a single hub through a cable.
Ring Topology:
In this topology, it forms a ring connecting a
devices with its exactly two neighboring devices.
Transmission modes in computer networks
Simplex Mode
The communication is
unidirectional, as on a
one-way street.
Half-duplex Mode
Each station can both
transmit and receive, but
not at the same time.
Full-duplex Mode
both stations can transmit and
receive simultaneously.
6
OSI MODEL
OSI Model It stands for Open
Systems Interconnection. It
comprises of 7 layers with the
following responsibilites
(starting from the lowest
layer)
7
TCP/IP Model
TCP/IP Model It comprises
of 5 layers with the following
responsibilities (starting from
the lowest layer):
8
Diffrence between OSI and TCP/IP
Protocol
9
OSI Model TCP/IP Model
1 OSI refers to Open System
Interconnection.
TCP refers to Transmission
Control Protocol.
2 OSI has 7 layers TCP/IP has 4 layers.
3 OSI have very strict boundaries TCP/IP does not have very strict
boundaries.
4 OSI uses different session and
presentation layers.
TCP/IP uses both session and
presentation layer in the
application layer itself.
5 OSI is less reliable TCP/IP is more reliable
6 OSI developed model then
protocol.
TCP/IP developed Protocol then
Model.
10
Thanks!
For Any questions?
query@cetpainfotech.com
https://cetpainfotech.com
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Pradesh

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All about Computer Networking Course

  • 2. What is Computer Network? Computer Network means an interconnection of autonomous (standalone) computers for information exchange. The connecting media could be a copper wire, optical fibre, microwave or satellite. 2
  • 3. Types of computer Networking
  • 4. Local Area Network (LAN) –LAN or Local Area Network connects network devices in such a way that personal computers and workstations can share data, tools, and program. Metropolitan Area Network (MAN) –MAN or Metropolitan area Network covers a larger area than that of a LAN and smaller area as compared to WAN. Wide Area Network (WAN) –WAN or Wide Area Network is a computer network that extends over a large geographical area. Personal area network (PAN) is the interconnection of information technology devices within the range of an individual person. 4
  • 5. Network Topologies 5 Mesh Topology: In mesh topology, every device is connected to another device via particular channel. Bus Topology: Bus topology is a network type in which every computer and network device is connected to single cable. Star Topology: In star topology, all the devices are connected to a single hub through a cable. Ring Topology: In this topology, it forms a ring connecting a devices with its exactly two neighboring devices.
  • 6. Transmission modes in computer networks Simplex Mode The communication is unidirectional, as on a one-way street. Half-duplex Mode Each station can both transmit and receive, but not at the same time. Full-duplex Mode both stations can transmit and receive simultaneously. 6
  • 7. OSI MODEL OSI Model It stands for Open Systems Interconnection. It comprises of 7 layers with the following responsibilites (starting from the lowest layer) 7
  • 8. TCP/IP Model TCP/IP Model It comprises of 5 layers with the following responsibilities (starting from the lowest layer): 8
  • 9. Diffrence between OSI and TCP/IP Protocol 9 OSI Model TCP/IP Model 1 OSI refers to Open System Interconnection. TCP refers to Transmission Control Protocol. 2 OSI has 7 layers TCP/IP has 4 layers. 3 OSI have very strict boundaries TCP/IP does not have very strict boundaries. 4 OSI uses different session and presentation layers. TCP/IP uses both session and presentation layer in the application layer itself. 5 OSI is less reliable TCP/IP is more reliable 6 OSI developed model then protocol. TCP/IP developed Protocol then Model.