4A0-100

4A0-100 practice questions, page 11 of 14, with answer review and explanations.

Question 51

Which of the following is typically a characteristic of Layer 2 framing?

  1. Provides a universal addressing scheme to uniquely identify destinations in the network.
  2. The size of the Layer 2 frame cannot exceed 1518 bytes.
  3. Provides error checking of the frame contents after transmission.
  4. All the above.

Question 52

Which of the following is NOT an example of a Layer 2 protocol?

  1. POS
  2. IP
  3. ATM
  4. Frame Relay
  5. Ethernet

Question 53

Why is the address field in a PPP header always set to "11111111"?

  1. PPP supports multipoint access networks with many stations. The all 1's acts as a broadcast.
  2. PPP supports multipoint access networks with many stations. The all 1's acts as a multicast.
  3. PPP supports point-to-point networks only. The address field is fixed.
  4. PPP supports point-to-point networks only. The address field can change dynamically since every station is assigned a PPP address.

Question 54

Which ATM adaptation layer is commonly used for transporting IP datagrams or non-real time data?

  1. AAL0
  2. AAL1
  3. AAL2
  4. AAL3/4
  5. AAL5

Question 55

Which of the following is a characteristic of ATM?

  1. Application data is transported in 53-byte cells.
  2. ATM circuits are identified by a VPI/VCI value.
  3. Provides enhanced QoS support with 5 classes of service.
  4. Ideal for multiple services on the same physical line.
  5. All of the above.
  6. None of the above