Basic CS-Networks [3i Infotech Placement]: Sample Questions 81 - 82 of 90

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Question 81

Networks
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Describe in Detail

Essay▾

What is NETBIOS and NET BEUI?

Explanation

  • NETBIOS:
    • Programming interface allowing I/O requests to be sent to and received from a remote computer.
    • Hides the networking hardware from applications.
    • Supports small to medium networks providing transport and network layer support.
    • Fast and small and works well for the DOS operating system.
  • System wide methods of resolving NETBIOS names to IP address are:
    • b-node - Broadcast node
    • p-node - Point-to-point node queries an NBNS name server to resolve addresses.
    • m-node - First uses broadcasts, then falls back to querying an NBNS name server.
    • h-node - The system first attempts to query an NBNS name server, then falls back to broadcasts if the name server fails.
  • NETBEUI:
    • NETBEUI is NETBIOS extended user interface.
    • A transport protocol designed by Microsoft and IBM for small subnets responsible for data transport.
    • Handles all the frame formatting not handled by NETBIOS.

Question 82

Networks
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Describe in Detail

Essay▾

How Gateway is different from Router?

Explanation

Different between Gateway and Router
GatewaysRouter
It is either a server with a gateway application or a device connecting a network of computers to another network.An application or device with ports, to which computers and servers connect.
If Network A wants to connect to Network B and vice versa, both networks must have gateways that provide exit and entry points for computers across two networks.Routers are programmed with routing tables to determine the shortest possible path between Computer A and Computer B
Used for user authentication which router cannot provide.Provides routing tables and deciding best path for the data to travel.
Used across more than one networks.Used only on one single network.
It is more costly.It is less costly.

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