Basic CS-Networks [3i Infotech Placement]: Sample Questions 83 - 84 of 90

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Question 83

Networks
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Describe in Detail

Essay▾

What is frame relay, in which layer it comes?

Explanation

Given Frame-Relay Network
  • Frame relay is a packet switching technology.
  • Operates in the data link layer.
  • Connection is used for remote sites inside the same country or across different countries.
  • It is a WAN protocol- operating in physical and data link layer in OSI model.
  • Designed for use across Integrated Services Digital Network interfaces- but also over other network interfaces.
  • Packet-switched networks enable end stations to dynamically share the network medium and the available bandwidth.

Bellow techniques are used in packet-switching technology.

  • Variable-length packets
  • Statistical multiplexing

Question 84

Networks
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Write in Short

Short Answer▾

What is MAC address?

Explanation

  • The unique address for a device identified at the Media Access Control layer in the network architecture.
  • Used by the Media Access Control sub-layer of the Data-Link Layer of telecommunication protocols.
  • Different MAC exist for each physical device type
  • Usually stored in ROM on the network adapter card.
  • A hardware identification number that uniquely identifies each device on a network- manufactured into every network card, ethernet card, or Wi-Fi card.
  • Reliable way to identify senders and receivers of data on the network.
  • They are usually written in one of the below three formats:
  1. MM: MM: MM: SS: SS: SS
  2. MM: MM-MM-SS-SS-SS
  3. MMM. MMM. SSS. SSS

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