Basic CS-Networks [TCS Placement]: Sample Questions 61 - 62 of 133

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Question 61

Networks
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Describe in Detail

Essay▾

What is a gateway or router?

Explanation

  • A node connected to two or more networks is called a router or gateway.
  • It forwards message from one network to another.
  • A gateway in a computer network is a key stopping point for data on its way to or from other networks.
  • Gateway routes traffic from a workstation to the outside network that is serving up the web pages.
  • For example, for internet connection at home gateway is the Internet Service Provider.
Given the Image is Define the Gateway or Router

Question 62

Networks
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Describe in Detail

Essay▾

What are the criteria necessary for an effective and efficient network?

Explanation

A network must meet a certain criteria to become useable. Most important three criteria are as follows:

Performance:

  • Measured in many ways, including transmit time and response time.
  • Performance is a measurement of various factors such as the amount of time for messages to travel from one device to another, the time it requires to get a response starting from an inquiry.
  • Performance of a network depends on a number of factors such as number of active users, type of the transmission medium, capabilities of the connected hardware, and efficiency of the software.

Reliability:

  • Network reliability is measured by the frequency of failure, time it takes to recover from failure, the network՚s robustness.

Security:

  • Security includes protecting data from unauthorized access and malicious programs like viruses.
  • Network must be secured- data sent should reach destination without any third-party reading, altering or destroying the data.
  • Network must also have secured procedures to recover from data losses and breaches.

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