What is Network Architecture in Computer Network?
A small network
can be as simple as just two computers linked together. A large network can
link hundreds of computers and peripherals together in various configurations, so in Network Architecture computers are connected logically and some computers have more resources than other computer. They are called client or server.
Networks Area
designed using the following architecture:
1) Peer to Peer (P2P) Architecture:
Network in which each workstation has the same capabilities and responsibly are called peer to peer network
2) Client Server Architecture:
Networks in
which certain computers have special dedicated tasks, providing services to
other computers are called client server network. The computer which provides
services is called server and the one that uses these services is called
client.
--------------------------------------------------
--------------------------------------------------
What is Topology in Computer Network?
There are many different devices that may be connected to a network such as CPU, disk drives, printers all these needs to be brought together in some way. Most often cables will be used to connect the terminals and other equipment together although radio communication links may be used. Topology may be defined as geometrical arrangement of nodes.
Some of the common network topology
1) Bus topology
2) Star topology
3) Ring topology
4) Tree topology
5) Mesh topology
Explain different types of Topology in Computer Network?
1) Bus Topology:
The arrangement, in bus topology consists of a long communication channels, called the backbone to which all the nodes are connected. The nodes are connected through small segments called drop-cable. Both the ends of the backbone cable are terminated with the help of absorbers.
Advantages of Bus Topology:
1) Low cabling cost as the total length of the cable is relatively small.
2) The layout of cables is simple.
3) New nodes can be inserted in the network without disturbing the network.
Disadvantages of Bus Topology:
1) At a time only one message can travel through the backbone cable.
2) The possibility of collision of message is high.
3) It’s unreliable
as a fault in the backbone cable can disrupt functioning of the whole network.
Chapter 1 – Digital Documentation
Chapter 2– Electronic Spreadsheet
Chapter 3 – Database Management System
Chapter 4 –Web Application
--------------------------------------------------
2) Star Topology:
Star is a type of network topology in which each of the nodes of a network is connected to a central node with a point to point link called a hub. Nodes are connected to the hub through drop cables which extend in all the direction.
Advantages of Star Topology:
1) If a node is down, the working of the other node is not affected.
2) The central node has all the drop cables connected to it, so maintenance is easy.
Disadvantages of Star Topology:
1) If the central node crashes due to any reason, the complete network comes to an halt.
2) As compared to bus topology more cabling is needed.
3) Ring Topology:
In ring topology each of the nodes of the network is connected to two other nodes in the network and with the first and last node being connected to each other forming a ring.
Advantages of Ring Topology:
1) At a time only one node transmits data, there is no chance of collision.
2) Separate repeaters
are not required.
Chapter 1 – Digital Documentation
Chapter 2– Electronic Spreadsheet
Chapter 3 – Database Management System
Chapter 4 –Web Application
Disadvantages of Ring Topology:
1) If any one of the nodes in the network fails, the complete network goes down.
2) Insertion of a new node is not possible without disrupting the entire network.
3) Finding out the faulty node will require examining a series of nodes.
4) Tree Topology:
In tree topology the separate branches are added to the main original bus. There many LAN s are joined like branches of a tree.
5) Mesh Topology:
In mesh topology some of the nodes of the network are connected to more than one other node in the network with a point to point link. The data that moves between nodes in the network takes the shortest path between nodes.
No comments:
Post a Comment