Basic CS-Networks [3i Infotech Placement]: Sample Questions 45 - 47 of 90

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Question 45

Networks

Question

MCQ▾

In OSI, terminal emulation is done in

Choices

Choice (4)

a.

application layer

b.

sessions layer

c.

transport layer

d.

presentation layer

Answer

a.

Explanation

  • Terminal emulation makes one computer terminal appear like other terminal.
  • Gives users ability to log on and get access to legacy programs in a mainframe operating system as a separate program task.
  • Terminal emulation comes in the application layer that uses software installed on PC or LAN server.
  • The PC thus functions as a dump terminal attached to a particular mainframe.
  • Telnet is also called terminal emulation.

Question 46

Networks
Edit

Write in Short

Short Answer▾

What is Gateway to Gateway protocol?

Explanation

  • An obsolete protocol for routing datagrams between internet gateways.
  • Designed as internet protocol datagram service to the transmission control protocol.
  • Defined as internet layer protocol.
  • A minimum hop algorithm measuring distance in router hops- implementing distributed shortest-path methodology.
  • Message has a field header that identifies the message type and the format of the remaining field.

Question 47

Networks
Edit

Describe in Detail

Essay▾

What is BGP (BORDER Gateway Protocol) ?

Explanation

Understanding of Border Gateway Protocol
  • BGP manages routing of packets across the internet through the exchange of routing and reachability information between routers.
  • It directs packets between autonomous system networks managed by a signal enterprise or service provider.
  • Described as a reachability protocol rather than a routing protocol.
  • It is a Path Vector Protocol maintaining paths to different hosts, networks and gateway routers- determining routing decision based on that.

Role of BGP:

  • It is Path Vector Protocol- communicating entire autonomous system path topology to other networks.
  • Maintains routing table with topologies of all externally connected networks.
  • Allows classless interdomain routing allocating IP addresses to connected internet devices.
  • Created to extend Exterior Gateway Protocol.

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