Computer Networks Interview Q and A

In computer networks OSI stand for ?

Open Systems Interconnection Model.


What are the seven layers of OSI model ?

  • Application layer
  • Presentation layer
  • Session layer

Function of session layer ?

Session layer initiates, manages and ends communication between the sender and receiver.

Function of presentation layer ?

Translation, encryption, authentication, data compression.


Difference between Intrusion detection system and intrusion prevention system ?

Intrusion Detection Systems can detect and alert, but do not block or reject bad traffic. Intrusion Prevention Systems can block traffic.


Deep Packet Inspection (DPI)

DPI is a method of examining the content of data packets as they pass by a checkpoint on the network.


What is packet PayLoad ?

It is actual data transported by a packet.