Nokia Nokia Certifications 4A0-100 Questions & Answers

• Question 291:

  Who was responsible for developing and publishing the original standard that was used for 10 Mbit/s Ethernet?

  A. Intel Corporation.

  B. Digital Equipment Corporation.

  C. DEC-Intel-Xerox.

  D. Apple Computer.

  E. IBM.

  Correct Answer: C

• Question 292:

  What is the basic unit of framing in SDH and the bit rate for its transmission?

  A. STM-1 with a bit rate of 1.544 Mbit/s

  B. STM-1 with a bit rate of 2.048 Mbit/s

  C. STM-1 with a bit rate of 51.84 Mbit/s

  D. STM-1 with a bit rate of 155.52 Mbit/s

  Correct Answer: D

• Question 293:

  What is the basic unit of framing in SONET and the bit rate for its transmission?

  A. STS-1 with a bit rate of 1.544 Mbit/s

  B. STS-1 with a bit rate of 2.048 Mbit/s

  C. STS-1 with a bit rate of 51.84 Mbit/s

  D. STS-1 with a bit rate of 155.52 Mbit/s

  Correct Answer: C

• Question 294:

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

  A. AAL0

  B. AAL1

  C. AAL2

  D. AAL3/4

  E. AAL5

  Correct Answer: E

• Question 295:

  Which of the following is a characteristic of ATM?

  A. Application data is transported in 53-byte cells.

  B. ATM circuits are identified by a VPI/VCI value.

  C. Provides enhanced QoS support with 5 classes of service.

  D. Ideal for multiple services on the same physical line.

  E. All of the above.

  F. None of the above

  Correct Answer: E

• Question 296:

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

  A. PPP supports multipoint access networks with many stations. The all 1's acts as a broadcast.

  B. PPP supports multipoint access networks with many stations. The all 1's acts as a multicast.

  C. PPP supports point-to-point networks only. The address field is fixed.

  D. PPP supports point-to-point networks only. The address field can change dynamically since every station is assigned a PPP address.

  Correct Answer: C

• Question 297:

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

  A. Provides a universal addressing scheme to uniquely identify destinations in the network.

  B. The size of the Layer 2 frame cannot exceed 1518 bytes.

  C. Provides error checking of the frame contents after transmission.

  D. All the above.

  Correct Answer: C

• Question 298:

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

  A. POS

  B. IP

  C. ATM

  D. Frame Relay

  E. Ethernet

  Correct Answer: B

• Question 299:

  What is the purpose of the Data Link Layer in the OSI model?

  A. The Data Link Layer is responsible for encapsulating the packet into a frame for transmission on the transmission media.

  B. The Data Link Layer is responsible for encapsulating the packet into an IP header and routing the packet.

  C. The Data Link Layer is responsible for formatting the packet for applications such as JPEG format.

  D. The Data Link Layer is responsible for timing of the signals on the transmission media

  Correct Answer: A

• Question 300:

  Using Q-in-Q Virtual Local Area Network (VLAN) stacking, how does a carrier differentiate one customers traffic from that of another?

  A. The provider edge (PE) switch adds an additional field called a PE tag to the customers Layer 2 data.

  B. The PE switch replaces the customers VLAN tag with a carrier-assigned tag.

  C. The PE switch adds a second VLAN tag to identify the customers traffic on the carriers network.

  D. The PE switch assigns a customer-specific priority label to the customers traffic.

  Correct Answer: C