Basic CS-Networks [3i Infotech Placement]: Sample Questions 55 - 56 of 90

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Question 55

Networks
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What is multicast routing?

Explanation

  • Protocol used to send data to multiple recipients.
  • Using multicast, a source can send a single copy of data to a single multicast address, which is then distributed to an entire group of recipients.
  • Protocols involving just one sender and one receiver are often referred to as unicast protocols.
  • Multicast address identifies a set of recipients interested in the data stream- can be an IP address from a well-defined range.
  • Routers between the source and recipients duplicate data packets and forward multiple copies wherever the path to recipients diverges. Multicast traffic does not reach networks that do not have any such recipients. This keeps duplicate copies of packets to a minimum.

Question 56

Networks
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Short Answer▾

What is autonomous system?

Explanation

  • An autonomous system is the unit of router policy, either a single network or a group of network controlled by a common network administrator on behalf of a single administrative entity.
  • Also referred as routing domain.
  • Assigned a globally unique number, sometimes called an Autonomous System Number.
  • Shares routing information with other autonomous systems using the Border Gateway Protocol.
  • Autonomous system can have many different networks operated under a single entity for easy management.
  • A single identifier is allocated to each autonomous system for BGP routing.

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