Which statement about WAN protocols is correct?

IT Questions BankCategory: CCNA 4 v4Which statement about WAN protocols is correct?

Which statement about WAN protocols is correct?

  • ATM differs from other WAN protocols in that it uses variably sized packets.
  • Most WAN protocols use HDLC or a variant of HDLC as a framing mechanism.
  • The frame header consists of the frame check sequence and cyclic redundancy check.
  • ISDN differs from Frame Relay, HDLC, and ATM in that it is packet-switched rather than circuit-switched technology.

Exam with this question: CCNA Exploration 4: EWAN Chapter 1 Exam


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