What is the difference between the ISO version of HDLC and the Cisco version of HDLC that is used, by default, on all serial interfaces?
A) Type field
B) Protocol field
C) Authentication support
D) Optimized header
E) Encryption support
A
Explanation: A) The Cisco version of HDLC adds a Type field that enables the routers to know which type of packet is inside each frame.
Computer Science & Information Technology
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Computer Science & Information Technology