Friday, 10 May 2013

What is computer Network?Full Article on computer networking


Networking term means when group of devices are connected to each other.So in computer network,interconnected computers are sharing resources.Resources like text,images,video,audio
,files,documents etc.In computer networking not only computer are connected but I/O devices,terminals are also connected and perform data communication.



What are the elements/components of data communication?


1)Message(content of data).

2)Sender(Devices that send data).
3)Receiver(Devices that receive data).
4)Medium(like wired,wireless etc.).
5)Protocol(set up rule of network).

Need/use/Objective/Advantages of Computer Network:-


1)It provide better communication between hardware and software.


2)Network provide sharing of resources.


3)Many times,error free transmissions are take place.


4)It provide good speed for transmission.


5)Networking is very cost effective.


6)Networking is very flexible. 


7)Video conferencing is also possible.


8)It provide good security.


Disadvantages of computer network:-


1)Sometimes,it may be costly.


2)Required lots of effort on installation.


Type of Computer Network:-


1)LAN:-LAN stands for Local Area Network.It is also called as Limited Area Network(But don't write this full form on your final examination).IN LAN,group of computer are connected to each other with in a building,office,school,home etc.


For more help in LAN than please visits Computer LAN(Full link).


2)MAN:-MAN stands for Metropolitan Area Network.In MAN,group of computer are connected to each other with in a whole city.


For more help in MAN than please visits Computer MAN(Full link).


3)WAN:-WAN stands for Wide Area Network.In WAN,group of computer are connected to each other with in a broad geographical area.


For more help in WAN than please visits Computer WAN(Full link).


4)VPN:VPN stands for Virtual Private Network.In Virtual Private Network,group of computer are virtually connected to each other in a private network.


Type of Computer network on the basis of Architecture/Network Models:-

1)Peer to Peer Networking:-In Peer to Peer Networking,group of computer are connected to each other in a network.In this type of networking their is no fix client and server.So it provide less security example cybercafe.

2)Client Server Architecture:-In Client Server Architecture,group of computer are connected to each other in a network.In this type of networking their is fix server and client(Every time server full fill the demand of client node).

What is Topology?

Topology is the physical layout of network.It may be in the shape of ring,star,bus etc.


Computer Network devices:-

Some important networking devices are HUB,switch,modem,router,bridge,gateway etc.These devices are used in transmission of data. 

Transmission Media:-

Transmission Media are used to transfer data from one computer to another computer.

It may be of 2 type:-

Guided Media(Twisted Pair Cable,Co-axial cable and Fibre Optic Cable).

2)Unguided Media(Blue tooth,Infrared,satellite etc.).



That's all about tutorials of basic computer Networking and its applications,if you have any query then leave your comments and don't forgot to follow me on Google+,Facebook,Twitter.

What is Network Topology?


Topology(LAN topology) is said to be the physical layout of the network(shape of the network).It specified how computer/nodes are connected to each other.It also represent the connection of nodes in a network.

Types of topology:-

1)Star Topology:-Star topology consist one central devices(HUB or Switch) which manage the whole data.




Advantages of Star topology:-

1)Easy to extend.

2)Easy to implement.

3)It is reliable.

4)Follow client Server architecture.

5)Transmission speed is very fast.

6)Installation is easy.

Disadvantages of Star topology:-

1)Use so many cables.

2)It is costly.

3)If central device is fail than whole system is down.

2)Ring Topology:-Ring topology are those topology whose physical layout is like a ring.It generally used coaxial cable.




Advantages of Ring topology:-

1)All nodes are equal.

2)Transmission speed is good.

3)Network is more readable.


Disadvantages of Ring topology:-

1)If one cable is loose than whole network is down.

2)If one node is not working than whole network is down.

3)It is expensive too.

3)Tree Topology:-It follow the concept of tree.It is also called as extended star topology.

4)Bus Topology:-Bus topology are those topology whose physical layout is like a linear bus.It is also called as linear topology.




Advantages of Bus topology:-


1)Easy to extend.

2)It is not expensive.

3)Follow client Server architecture.

Disadvantages of Bus topology:-

1)Required more cables.

2)Provide low security.

3)Troubleshooting problem.

4)If one cable is loose than whole network is down.

5)Mesh Topology:-It is also called as point to point topology because in this topology all nodes are connected to each other in a point to point network.




If you have any query then leave your comments and don't forgot to follow me on Google+,Facebook,Twitter.

What is transmission media or transmission medium?


Transmission media is also called as communication medium or channel.Transmission media play a very important role in computer network.In computer networking it is used to transfer resources(like data /information) from one place to another.

Transmission media are of two types:-

1)Guided Media:-Guided media is also called as physical media or wired media.In guided media one network is connected to another network using a set of wires.

Guided media are of 3 types:-

a)Twisted Pair Cable:-Twisted Pair Cable is very common in our daily life,even a phone wires is also made up of Twisted Pair Cables.It consist 8 wires and 4 pairs(2 each).Twisted Pair Cable is very cheap technology as compared to Fiber Optic cable and Coaxial cable.




Twisted Pair Cable again divided into two parts:-

->UTP:-UTP stands for Unshielded Twisted Pair cable.It is effected by EMI(Electro Magnetic Interference).

->STP:-STP stands for shielded Twisted Pair cable.It is not effected by EMI(Electro Magnetic Interference).

b)Coaxial Cable:-Coaxial Cable is made up of copper wire and it provide better shielding and carry more data as compared to Twisted Pair Cable.




Coaxial Cable again divided into two parts:-

->Thin cable:-Only one signal transmit at a time.

->Thick cable:-More than one signal transmit at a time.

c)Optical Fiber Cable:-It provide better and fast communication as compared to Twisted pair cable and coaxial cable.It transfer data at very high speed through light signal.




Optical Fiber Cable again divided into two parts:-

->Single mode Optical Fiber Cable:-One light signal transmit at a time.

->Multi mode Optical Fiber Cable:-More than one light signal transmit at a time.

2)Unguided Media:-Also called as wireless media.Some common example of unguided media are blue-tooth,infrared,satellite etc.


If you have any query then leave your comments and don't forgot to follow me on Google+,Facebook,Twitter.

Thursday, 9 May 2013

What is Local Area Network(LAN)?


You may also like:-What is Wide Area Network(WAN)?

What is Metropolitan Area Network(MAN)?

LAN stands for Local Area Network.It is also called as Limited Area Network.In LAN,group of computer are connected to each other with in a building,office,school,home etc.The range of LAN is very small i.e. 0 to 5 Km.Some component of LAN are nodes,server,NIC(Network Interface Card) etc.LAN basically used only twisted pair cable and common example of LAN is Ethernet.

Diagram of Local Area Network:-




Advantages/Disadvantages/Needs/Characteristics of LAN:-

1)Using LAN,we can access so many devices like Printer,plotter etc.

2)LAN provides great security.

3)LAN is reliable.

4)Easy to manage.

5)Rate of error is very low.

6)Easily expandable.

7)We can transfer our resources very easily.

8)Sharing of resources are of very high speed.

9)Easy to setup.

10)Installation is easy as compared to MAN and WAN.

11)It is very cost effective.

12)Limited number of computer are connected.

13)It connected in a small geographical area.

14)It can be wired or wireless.


If you have any query then leave your comments and don't forgot to follow me on Google+,Facebook,Twitter.

What is Wide Area Network(WAN)?


You may also like:-What is Local Area Network(LAN)?

What is Metropolitan Area Network(MAN)?


WAN stands for Wide Area Network.In WAN,group of computer are connected to each other with in a broad geographical area.


WAN is formed from the combination of two or more MAN.It connected different-2 cities,states or even countries.

Diagram of Wide Area Network:-






WAN  are of 2 types:-


1)Public WAN:-Public Wide Area Network are those network in which the data and information(resources) are access and shared publicly example Internet.


2)Private WAN:-Private Wide Area Network are those network in which the data and information(resources) are access and shared privately example ARPANET.


Advantages/Disadvantages/Needs/Characteristics of WAN:-


1)It covered very large geographical area.


2)Large number of nodes are connected.


3)It may be used in guided(wired) or unguided(wireless) medium.


4)Transmission speed is not such good as LAN.


5)Resources are shared very easily.


6)Error rate is higher as compared to LAN.


7)Easily expandable.




That's all about Wide Area Networking and its components,If you have any query then leave your comments and don't forgot to follow me on Google+,Facebook,Twitter.

What is Metropolitan Area Network(MAN)?


You may also like:-What is Local Area Network(LAN)?

What is Wide Area Network(WAN)?


MAN stands for Metropolitan Area Network.In MAN,group of computer are connected to each other with in a whole city using some network devices like HUB,repeater etc.(we need such devices because in MAN,signal becomes week due to large geographical area so these devices are boost up the signal).It range from 0-100 Km.

Diagram/Image of Metropolitan Area Network:-




Advantages/Disadvantages/Needs/Characteristics/features of MAN:-


1)It covered large geographical area.


2)It is made up the combination of two or more than two LAN.


3)It mainly used Fibre optic cable.


4)It transmission is very fast.


5)It generally covered a city or a town.


6)It support voice communication.


7)It may be used in guided(wired) or unguided(wireless) medium.




If you have any query then leave your comments and don't forgot to follow me on Google+,Facebook,Twitter.