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CISSP · Question #43

An advantage of link encryption in a communications network is that it

The correct answer is D. encrypts all information, including headers and routing information.. An advantage of link encryption in a communications network is that it encrypts all information, including headers and routing information. Link encryption is a type of encryption that is applied at the data link layer of the OSI model, and encrypts the entire packet or frame as

Submitted by lukas.cz· Mar 5, 2026Communication and Network Security

Question

An advantage of link encryption in a communications network is that it

Options

  • Amakes key management and distribution easier.
  • Bprotects data from start to finish through the entire network.
  • Cimproves the efficiency of the transmission.
  • Dencrypts all information, including headers and routing information.

How the community answered

(44 responses)
  • A
    7% (3)
  • B
    2% (1)
  • C
    2% (1)
  • D
    89% (39)

Explanation

An advantage of link encryption in a communications network is that it encrypts all information, including headers and routing information. Link encryption is a type of encryption that is applied at the data link layer of the OSI model, and encrypts the entire packet or frame as it travels from one node to another. Link encryption can protect the confidentiality and integrity of the data, as well as the identity and location of the nodes. Link encryption does not make key management and distribution easier, as it requires each node to have a separate key for each link. Link encryption does not protect data from start to finish through the entire network, as it only encrypts the data while it is in transit, and decrypts it at each node. Link encryption does not improve the efficiency of the transmission, as it adds overhead and latency to the communication.

Topics

#link encryption#network encryption#header encryption

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