Which of the following is true about link encryption?

The correct answer is C. This mode does not provide protection if anyone of the nodes along the transmission path is. In link encryption, data is encrypted and decrypted at every node along the transmission path - not just at the final destination. This means plaintext is briefly exposed at each intermediate node for re-encryption. Therefore, if any node along the path is compromised, the…

Submitted by klara.se· Apr 18, 2026Network and Communications Security

Question

Options

AEach entity has a common key with the destination node.
BEncrypted messages are only decrypted by the final node.
CThis mode does not provide protection if anyone of the nodes along the transmission path is
DOnly secure nodes are used in this type of transmission.

How the community answered

(39 responses)

A
3% (1)
C
92% (36)
D
5% (2)

Explanation

In link encryption, data is encrypted and decrypted at every node along the transmission path - not just at the final destination. This means plaintext is briefly exposed at each intermediate node for re-encryption. Therefore, if any node along the path is compromised, the security of the entire message is at risk. This is the fundamental weakness of link encryption compared to end-to-end encryption, where only the final destination decrypts the message.

Topics

#Link Encryption#Network Security#Data in Transit#Cryptography Vulnerabilities

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