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TIA CCNT Exam
TIA Convergent Network Technologies (Page 22 )

Updated On: 1-Feb-2026
Page 22 of 213
PDF with 1057 Questions

What does AAL3/4 support?

  1. Timing requirements, constant bit rate, connection-oriented
  2. Timing requirements, variable bit rate, connection-oriented
  3. No timing requirements, only variable bit rate, either connectionless or connection-oriented
  4. No timing requirements, variable and constant bit rate, either connectionless or connection-oriented
  5. Answer pending.

Answer(s): E



In the SMDS interface protocol, the sending router creates L3PDUs. What information does an L3PDU contain?

  1. 36 octets of header
  2. 4 octets of trailer
  3. Up to 9,188 octets of user data
  4. All of the above
  5. Answer pending.

Answer(s): E



The CSU/DSU receives an L3PDU from the sending router and creates L2PDUs.
What is an L2PDU?

  1. A 36-octet cell division of the L3PDU
  2. A 53-octet cell division of the L3PDU
  3. A 53-octet cell multiple of L3PDUs
  4. A 48-octet cell multiple of L3PDUs

Answer(s): D



Which of the following is NOT a step in the SIP transport process?

  1. Encapsulate the SMDS data unit with header and trailer information.
  2. Construct L2PDUs into L3PDUs and send them to the router.
  3. Check the SMDS data unit for errors.
  4. Divide the L3PDU into L2PDUs and place on the access circuit.
  5. Answer pending.

Answer(s): E



Which of the following is the first step in the SIP transport process?

  1. Encapsulate the SMDS data unit with header and trailer information.
  2. Create an SMDS data unit.
  3. Construct L2PDUs into L3PDUs and send them to the router.
  4. Divide the L3PDU into L2PDUs and place on the access circuit.

Answer(s): B



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