Multiple choice

Which additional functionality is available on an interface when the encapsulation is changed from HDLC to PPP?

  1. Flow control

  2. Error control

  3. Authentication

  4. Synchronous communication
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

HDLC is a basic WAN encapsulation protocol that provides no authentication mechanism. PPP was designed with extensible features including authentication protocols (PAP and CHAP) that can verify the identity of connecting devices before establishing a full connection.

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