Basic CS-Networks [TCS Placement]: Sample Questions 83 - 84 of 133

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Question 83

Networks
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Describe in Detail

Essay▾

Difference between the communication and transmission.

Explanation

Difference between Communication and Transmission
CommunicationTransmission
Full exchange of information between two communication media- refers to overall dialogue between the source and destinationPhysical movement of information concerned with issues like bit polarity, synchronization, clock etc.
Process of sending and receiving data by means of a data cable connected externally.Means the transfer of data from the source to the destination.
Two-way interactive process where participants actively share their data.One way data transfer

Question 84

Networks
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Describe in Detail

Essay▾

What is packet filter?

Explanation

  • Packet filtering is also known as static filtering.
  • Packet filter is a standard router equipped with functionality to allow incoming or outgoing packets to be inspected.
  • Packets meeting some criterion are forwarded normally while those failing test are dropped.
  • Used as a firewall technique to control network access by monitoring outgoing and incoming packets based on the source and destination Internet Protocol (IP) addresses, protocols and ports.
  • Dealing with each individual packet, the firewall applies its rule set to determine which packet to allow or disallow.
  • A packet filter firewall is the simplest type of firewall.
The Packet Filter

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