9th Class Computers Science Networking Understanding Network Topology

  Understanding Network Topology

Topology determines the physical configuration of a network. Basically it provides the way how to connect computer while developing computer network. There are number of topology available, such as bus topology, star topology, ring topology, tree topology and hybrid topology.  

 Star Topology

Star Topology is one of the most common network setup. In this topology each node is directly connected with hub. Thus the devices in the network are not directly linked to each other. The main advantage of star topology is that if any node fails, it does not affect the entire network. It is also less expensive than mesh, and hence easy to configure and maintain. The main disadvantage of star topology is that if the central hub fails, all computers connected with hub are disconnected automatically and whole network would fail. The following is the figure of star topology: (See Figure. 9.4.4)  

 Bus Topology

Bus Topology provides one of the simplest network structures. In this topology all nodes are connected together to the parallel cable by drop lines and taps / T- connectors. The cable is arranged in a straight line and each node connects to the cable with a T-connector. The advantage of bus topology is low cost because it requires less cable, It is also easy to install. It is difficult to reconfigure. It has parallel network cable. The major disadvantage of this type of topology is if cable breaks, then entire network fails down. The following is the figure of bus topology: (See Figure. 9.4.5)  

 Ring Topology

In Ring Topology all computers are connected in a ring shape. In this topology each node has an input and an output connection. It contains wiring that allows information to pass from one device to another in a circle or ring. The main advantages of ring topology is, it is easy to install and provides good signal quality. The main disadvantages of ring topology: If one node fails or the ring is broken, then the network is down. The following is the figure of ring topology: (See Figure. 9.4.6)  

 Topology determines the physical configuration of a network. Which one of the following is not a network topology?

(A) Star                                                                                

(B) Bus

(C) Ring                                                                               

(D) Tree

(E) None of these

Answer: (E)

Explanation  

Correct Option:

(E) None of these is the correct answer because star, ring, bus and tree all are network topology.

Incorrect Options: Rest of the options is incorrect.  

  In which of the following topologies each computer is directly attached with hub?

(A) Bus                                                                

(B) Ring

(C) Star                                                                

(D) All of these

(E) None of these

Answer: (C)

Explanation

Correct Option:

(C) In star topology each node is directly connected with hub.

Incorrect Option:

Rests of the options is invalid.    

 ............. topology each node has an input and an output connection. It is easy to install and provides good signal quality

(A) Bus                                                                

(B) Ring

(C) Star                                                                

(D) All of these

(E) None of these  

Answer: (B)  

Explanation

Correct Option:

(B) In ring topology each node has an input and an output connection.  

Incorrect Option:

(A) In bus topology all nodes are connected together to the parallel cable by drop lines.

(C) In star topology each node is directly connected with hub.  

• The 802.6 is a MAN standard.
• ASK.com is a search engine.

• Newsgroup: Is an application that allows you to access Usenet news.
• Telnet: Is a method that is used to connect to another computer on the Internet.
• WAN: Is one of the computer networks which is established on a large geographical area.    

• While connecting more than one computer with each other through wire o r wireless is called computer network,
• A Wide Area Network is one of the computer networks which is established on a large geographical area.
• FTP is a method that is used to transfer files from one networked computer to another.
• Topology provides the way how to connect computer while developing computer network.
• Bus topology provides one of the simplest network structures.
• The first network was implemented by both IBM's SNA (Systems Network Architecture) and Digital's network architecture.
• FTP is a method that is used to transfer files from one networked computer to another.  

  Abbreviations

• SNA ................  Systems Network Architecture
• LAN ................. Local Area Network
• WAN ................ Wide Area Network