Thursday, November 27, 2014

Networking Interview Q & A



           Windows & Networking

        
1. Define Network?
A network is a set of devices connected by physical media links. A network is recursively is a connection of two or more nodes by a physical link or two or more networks connected by one or more nodes.


2. What is a Link?
At the lowest level, a network can consist of two or more computers directly connected by some physical medium such as coaxial cable or optical fiber. Such a physical medium is called as Link.


3. What is a node?
A network can consist of two or more computers directly connected by some physical medium such as coaxial cable or optical fiber. Such a physical medium is called as Links and the computer it connects is called as Nodes.


4. What is a gateway or Router?
A node that is connected to two or more networks is commonly called as router or Gateway. It generally forwards message from one network to another.


  5. What is point-point link?
    If the physical links are limited to a pair of nodes it is said to be point- point 

6. What is Multiple Access?
 If the physical links are shared by more than two nodes, it is said to be
 Multiple Access.


7. What are the advantages of Distributed Processing?
a. Security/Encapsulation
b. Distributed database
c. Faster Problem solving
d. Security through redundanc
e. Collaborative Processing


8. What are the criteria necessary for an effective and efficient network?
   a. Performance
It can be measured in many ways, including transmit time and response   time 
b. Reliability
It is measured by frequency of failure, the time it takes a link to recover from a failure, and the network's robustness.
    c. Security
Security issues includes protecting data from unauthorized access and virus.


9. Name the factors that affect the performance of the network?
a. Number of Users
b. Type of transmission medium
c. Hardware 
d. Software


10. Name the factors that affect the reliability of the network?
a. Frequency of failure
b. Recovery time of a network after a failure

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