Computer Network: Network is the large part of connection made to make people communicate each other. Computer Network are very important in today’s life. It has been changed and advanced time to time. Computer Network have made easy to access internet to all the people across globe. There are many facts about Computer Network and internet protocol.We will be discussing about Computer Network and Internet Protocol.
Facts about Computer Network
Computer Network are of three types I.e. LAN, MAN and WAN.
LAN is a Local Area Network, it is used by Routers, Hub and Repeaters. It is a network which interconnects different system within a same residency like school, hospital, bank, organisations etc. LAN are connected through wired and radio waves to form metropolitan area network.
MAN is Metropolitan Area Network, it interconnects all the users with computer resources in a geographic area larger than that is covered by Local Area Network.
WAN is Wide Area Network, it interconnects a large wide area which involves LAN and MAN. It is established with leased telecommunication circuits.
Over the whole world we uses two transmission techniques, they are Digital and Analog. Digital transmission is also the baseband transmission and analog transmission is also the broadband transmission.
Note: The worlds largest network is the FLAG network by Under sea cable.
MODEM stands for Modulator and Demodulator. It converts digital signal into analog and analog signal to digital signal.
Internet is like a hardware which make it possible to use net connection I.e. world wide web or WWW. WWW acts like a software.
Internet was invented by:
- Vinton Cerf
- Robert E Kahn
- Dr. Hiten Yogen Dalal
- Carl Sunshine
WWW was invented by:
- Tim Berners-Lee
- Robert Calling
POP stands for Point of Presence. Point of Presence. For example: You are not having Airtel network in your area so you will call Airtel to establish an Airtel tower in that area. This tower is called as Point of Presence.
Why do we do Networking?
- Resource Sharing in Hardware (disk, printer) and Software (Application).
- Information Sharing for easy accessibility and search capability (www).
- Communication by Email and Message broadcast.
- Remote Computing
- Distributed processing (Grid Computing)
There are many Networking Devices:
- ATM Switch
- Router (LAN/WAN)
- Switch (LAN)
- COMM server
- ISDN Switch
- File Server
- Phone Customer
- Network Cloud
- Home Office
Note: Bridge is used to connect LAN or wired with wireless network.
Switches stores the MAC address assigned to each system. While Router stores the IP address. Router is used for packet switching, packet filtering, inter network communication and path selection.
Different types of Network Topology
- Extended Star
Note: Phone is of two types I.e. Analog and Digital.
Ring Topology- In Ring topology every node is connected to two other nodes and packets are transferred from one node to another. It is a uni directional method.
Mesh Topology- In Mesh Topology each node is connected to every single node so that packet can be transferred from any node,in case of failure of one path that packet can be transferred through another path.
Star Topology- In Star topology there is a main hub which is connected to small nodes. In this case if a connection or wire is broken, it will not effect any other nodes and connections.
Line Topology- In this all the nodes are connected in a similar manner like coaches of a train. The disadvantage is if one nodes gets fault the whole connection will get disrupted.
Bus Topology- In this topology all the nodes are connected to single cable.
Ethernet Naming Convention
Ethernet Naming is based on some of the parameters like Speed, Transmission Technique and Physical Medium.
- Speed defines the Bit Rate of data.
- Transmission Technique is the type of transmission I.e. Baseband or Broadband.
- Physical Medium defines the type of medium. For eg. T (Unshielded Twisted Pair), Lx (Long Wavelength Fibre), Sx (Small Wavelength Fibre)
10Base 200 => 10 Mbps over canonical cable
LAN traffic congestion is caused due to the increasing traffic as among the 7 billion population, 4 Billion have internet access. It can be caused due to:
- Too many host
- Broadcast Storm
- Multi casting
- Low Bandwidth
- Adding hubs for connectivity to network
- Bunch of ARP or IPx traffic
LAN transmission Method are of three types:
Unicast: Data packets are sent from source to a single destination.
Multi cast: Data packets are copied and are sent to a specific destination.
Broadcast: Data packets are copied and are sent to entire network.
Computer Network Fundamentals
So this was all about Facts about Computer Network | Internet Protocol. We will discuss more about Computer Network in out next session. If you have any further information then you can share us by commenting in the comment box below. Stay tuned to us at EducationTimes.