Nokia (4A0-100) Scalable IP Networks Sample Questions

Question 1 – Which of the following 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 2 – Which of the given options are examples of Time Division Multiplexing (Choose two)?

• A. Ethernet.
• B. Token-Ring.
• C. SONET/SDH.
• D. E1 carrier.
• E. PPP

Correct Answer: CD

Question 3 – What number of DS-3 frames can be transported in an OC-3 frame?

A. 1

B. 2

C. 3

D. 4

Correct Answer: C

Question 4 – Who developed and published the original 10 Mbit/s Ethernet standard?

• A. Intel Corporation.
• B. Digital Equipment Corporation.
• C. DEC-Intel-Xerox.
• D. Apple Computer.
• E. IBM.

Correct Answer: C

Question 5 – Which of the following Ethernet frame field would the receiver use for verifying the integrity of the received bits?

• A. Destination address
• B. Frame check sequence
• C. Preamble
• D. Length field

Correct Answer: B

Question 6 – What is the difference between Ethernet II and Ethernet 802.3?

• A. Ethernet 802.3 is used only on point-to-point links, but Ethernet II is used on broadcast networks.
• B. The two bytes after the source MAC address in Ethernet II indicate the frame type, while the two bytes after the source MAC address indicate the frame length in Ethernet 802.3.
• C. Two bytes after the MAC address of the source in Ethernet 802.3 are used for type designation, whereas two bytes after the MAC address in Ethernet II indicate the frame length.
• D. Ethernet II and Ethernet 802.3 are two different names for the same protocol

Correct Answer: B

Question 7 – In MAC Address 00-20-60-CE-2B-28, which of the following part is the Organizationally Unique Identifier (OUI)?

• A. 2B-28
• B. 00-20
• C. CE-2B-28
• D. 00-20-60

Correct Answer: D

Question 8 – In which of the following addressing schemes does the information come from a single source and be accessed by all devices within a group?

• A. Anycast.
• B. Multicast.
• C. Broadcast.
• D. Unicast.

Correct Answer: B

Question 9 – Which of the given statement is correct regarding Ethernet half-duplex transmission?

• A. Half-duplex transmission is less efficient because the frame MTU is smaller.
• B. Half-duplex transmission is only 30-40% efficient because of collisions.
• C. Ethernet switches support half-duplex transmission only.
• D. All of the above.

Correct Answer: B

Question 10 – Which of the following statements correctly describes carrier sense in the CSMA/CD algorithm?

• A. The host will retransmit the frame if it detects a collision during transmission.
• B. The host is able to detect the transmission speed of the Ethernet switch port to which the host is connected.
• C. The host will transmit data on detecting that no other devices are transmitting.
• D. The host will transmit upon a timer expiry.
• E. The host will transmit on receiving the token.

Correct Answer: C

Question 11 – An Ethernet link with a full-duplex speed of 10 Mbps can transmit data at what rate?

• A. 5 Mbps.
• B. 10 Mbps.
• C. 15 Mbps.
• D. 20 Mbps.

Correct Answer: D

Question 12 – Which of the given Ethernet rates requires an optical cable for operating?

• A. 10 Mb/s Ethernet.
• B. 100 Mb/s Ethernet.
• C. 1000 Mb/s Ethernet.
• D. There are copper and optical versions possible for all of these Ethernet data rates.

Correct Answer: D

Question 13 – What distance is supported using CAT-5 cabling for 10/100/1000 TX?

• A. 100 m
• B. 500 m
• C. 1 Km
• D. 10 Km

Correct Answer: A

Question 14 – Which of the given statements is correct regarding Layer 3 addressing?

• A. Internet devices on the same network can have the same Layer 3 address in different broadcast domains.
• B. Every Host device needs to have a unique Layer 3 address in order to access the Internet.
• C. Internet devices require unique Layer 3 addresses for communicating directly with upper layers.
• D. A router needs to have only one address for allowing itself to be uniquely identified.

Correct Answer: B

Question 15 – Which of the given statements is a characteristic of the IP layer?

• A. Providing an unreliable, connectionless data transmission service.
• B. Providing a mechanism for flow control.
• C. Verifying the integrity of all received datagrams.
• D. Providing services equivalent to the OSI data link layer.

Correct Answer: A