Basic CS-Networks [3i Infotech Placement]: Sample Questions 14 - 15 of 90

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Question 14


Describe in Detail


Explain 5 - 4-3 rule?


Define 5 - 4-3 Rule
  • The 5 - 4-3 rule is used in the design of shared Ethernet networks to promote optimal traffic flow.
  • Refers to the number of repeaters and segments that must be present on shared Ethernet backbones set up in a tree topology.
  • The 5 - 4-3 rule divides segments into two types:
  1. Populated segments
  2. Unpopulated segments
The 5 - 4-3 Rule Divides Segments into Two Types
  • The 5 - 4-3 rule was designed to minimize signal transmission time.
  • States that 10- Mbps Ethernet should be used on no more 5 network segments and 4 repeaters with no more than 3 of the five network segments for end-users.

Question 15


Write in Short

Short Answer▾

What is NVT (Network Virtual Terminal) ?


Computer Network of Virtual Terminal
  • Network Virtual Terminal (NVT) is just a representation of a basic terminal providing standard for Telnet connection.
  • Software rules which define how data and commands are sent across the network allowing interoperability between Telnet and heterogeneous computers and operating systems.
  • For example, in above figure TELNET client translates characters from the local terminal into NVT.
  • TELNET server translates data and commands from NVT to form acceptable by the remote computer.
  • Useful for testing, making sure conventions are handled by software ensuring that other servers and clients are doing the same.

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