All about Computer Networks

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All about COMPUTER NETWORKS
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contents1.Introduction of computer
network2.Types of Networking3.Network
Topologies4.Transmission Modes 5.OSI
Model6.TCP/IP Protocol7.Diffrence between OSI
/TCP model
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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.

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Types of computer Networking
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• 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.

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Network Topologies
Mesh TopologyIn mesh topology, every device is
connected to another device via particular
channel. Bus TopologyBus topology is a network
type in which every computer and network device
is connected to single cable. Star TopologyIn
star topology, all the devices are connected to a
single hub through a cable. Ring TopologyIn
this topology, it forms a ring connecting a
devices with its exactly two neighboring devices.
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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.

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OSI MODEL

• OSI Model It stands for Open Systems
  Interconnection. It comprises of 7 layers with
  the following responsibilites (starting from the
  lowest layer)

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TCP/IP Model

• TCP/IP Model It comprises of 5 layers with the
  following responsibilities (starting from the
  lowest layer)

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• Diffrence between OSI and TCP/IP Protocol

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.
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Thanks!

• Any questions?