Practice Exam Test Questions
Choose the letter of the best answer in each questions.
1. __________ uses four twisted pairs.
A) 1000Base-LX
B) 1000Base-T
C) 1000Base-SX
D) none of the above
Answer: Option B
Solution:
2. 1000Base-SX, 1000Base-LX, and 1000Base-CX use _________ block coding and ________ line coding.
A) 8B/10B; NRZ
B) 4B/5B; NRZ
C) 8B/10B; MLT-3
D) 4B/5B; MLT-3
Answer: Option A
Solution:
3. _________ uses two fiber-optic cables.
A) 100Base-FX
B) 100Base-T4
C) 100Base-TX
D) none of the above
Answer: Option A
Solution:
4. __________ uses two optical fibers and a short-wave laser source.
A) 1000Base-LX
B) 1000Base-SX
C) 1000Base-T
D) none of the above
Answer: Option B
Solution:
5. What is the hexadecimal equivalent of the Ethernet address 01011010 00010001 01010101 00011000 10101010 00001111?
A) 5A:81:BA:81:AA:0F
B) 5A:11:55:18:AA:0F
C) 5A:88:AA:18:55:F0
D) 5A:18:5A:18:55:0F
Answer: Option B
Solution:
6. In Ethernet addressing, if all the bits are 1s, the address is _________.
A) multicast
B) broadcast
C) unicast
D) none of the above
Answer: Option B
Solution:
7. If an Ethernet destination address is 07:01:02:03:04:05, then this is a ______ address.
A) broadcast
B) unicast
C) multicast
D) any of the above
Answer: Option C
Solution:
8. Each station on an Ethernet network has a unique _______ address imprinted on its network interface card (NIC).
A) 48-bit
B) 32-bit
C) 5-byte
D) none of the above
Answer: Option A
Solution:
9. Gigabit Ethernet has a data rate of ________Mbps.
A) 10,000
B) 1000
C) 100
D) 10
Answer: Option B
Solution:
10. In the Ethernet frame, the _______ field contains error detection information.
A) address
B) preamble
C) CRC
D) none of the above
Answer: Option C
Solution:
11. 100Base-T4 uses ________ line coding.
A) 8B6T
B) Manchester
C) MLT-3
D) NRZ
Answer: Option A
Solution:
12. ________uses long-wave 1310-nm single mode fiber.
A) 10GBase-E
B) 10GBase-S
C) 10GBase-L
D) none of the above
Answer: Option C
Solution:
13. ______defines a protocol data unit (PDU) that is somewhat similar to that of HDLC.
A) LLC
B) LLU
C) MAC
D) none of the above
Answer: Option A
Solution:
14. 100Base-TX uses _________ block coding and ________ line coding.
A) 8B/10B; NRZ
B) 4B/5B; MLT-3
C) 4B/5B; NRZ
D) 8B/10B; MLT-3
Answer: Option B
Solution:
15. The _____ sublayer is responsible for the operation of the CSMA/CD access method and framing.
A) MAC
B) MII
C) LLC
D) none of the above
Answer: Option A
Solution:
16. _______ is the most widely used local area network protocol.
A) Token Bus
B) Ethernet
C) Token Ring
D) none of the above
Answer: Option B
Solution:
17. In Ethernet addressing, if the least significant bit of the first byte is 1, the address is _________.
A) multicast
B) broadcast
C) unicast
D) none of the above
Answer: Option A
Solution:
18. Gigabit Ethernet access methods include _______ mode.
A) full-duplex
B) half-duplex
C) both (a) and (b)
D) neither (a) nor (b)
Answer: Option C
Solution:
19. _________ uses four pairs of voice-grade, or higher, twisted-pair cable.
A) 100Base-T4
B) 100Base-FX
C) 100Base-TX
D) none of the above
Answer: Option A
Solution:
20. Standard Ethernet (10-Mbps) uses _______ encoding.
A) AMI
B) Manchester
C) NRZ
D) differential Manchester
Answer: Option B
Solution:
21. In _________, auto negotiation allows two devices to negotiate the mode or data rate of operation.
A) Ten-Gigabit Ethernet
B) Gigabit Ethernet
C) Fast Ethernet
D) Standard
Answer: Option C
Solution:
22. If an Ethernet destination address is 08:07:06:05:44:33, then this is a ______ address.
A) broadcast
B) unicast
C) multicast
D) any of the above
Answer: Option B
Solution:
23. ________ uses short-wave 850-nm multimode fiber.
A) 10GBase-E
B) 10GBase-L
C) 10GBase-S
D) none of the above
Answer: Option C
Solution:
24. Which of the following could not be an Ethernet multicast destination?
A) 7B:AA:C1:23:45:32
B) 7C:56:21:1A:DE:F4
C) 83:32:21:21:4D:34
D) B7:7B:6C:DE:10:00
Answer: Option B
Solution:
25. __________ uses thin coaxial cable.
A) 10Base2
B) 10Base5
C) 10Base-F
D) 10Base-T
Answer: Option A
Solution:
26. In the Ethernet, the _______field is actually added at the physical layer and is not (formally) part of the frame.
A) address
B) CRC
C) preamble
D) none of the above
Answer: Option C
Solution:
27. Fast Ethernet has a data rate of ________Mbps.
A) 10,000
B) 1000
C) 100
D) 10
Answer: Option C
Solution:
28. The purpose of the _______ is to provide flow and error control for the upper-layer protocols that actually demand these services.
A) LLC
B) LLU
C) MAC
D) none of the above
Answer: Option A
Solution:
29. __________ uses two pairs of twisted-pair cable.
A) 100Base-T4
B) 100Base-TX
C) 100Base-FX
D) none of the above
Answer: Option B
Solution:
30. ________ uses fiber-optic cable.
A) 10Base2
B) 10Base-F
C) 10Base-T
D) 10Base5
Answer: Option B
Solution:
31. In Ethernet addressing, if the least significant bit of the first byte is 0, the address is _________.
A) broadcast
B) multicast
C) unicast
D) none of the above
Answer: Option C
Solution:
32. ________ uses 1550-mm single mode fiber.
A) 10GBase-E
B) 10GBase-S
C) 10GBase-L
D) none of the above
Answer: Option A
Solution:
33. 1000Base-T uses ________ line coding.
A) MLT-3
B) 4D-PAM5
C) Manchester
D) 8B6T
Answer: Option B
Solution:
34. The maximum frame length for 10-Mbps Ethernet is ________ bytes.
A) 1200
B) 1518
C) 1500
D) none of the above
Answer: Option B
Solution:
35. The minimum frame length for 10-Mbps Ethernet is _______bytes.
A) 128
B) 80
C) 32
D) none of the above
Answer: Option D
Solution:
36. __________uses two optical fibers and a long-wave laser source.
A) 1000Base-T
B) 1000Base-SX
C) 1000Base-LX
D) none of the above
Answer: Option C
Solution:
37. The _______ layer of Ethernet consists of the LLC sublayer and the MAC sublayer.
A) network
B) data link
C) physical
D) none of the above
Answer: Option B
Solution:
38. 100Base-FX uses _________ block coding and ________ line coding.
A) 8B/10B; NRZ
B) 4B/5B; MLT-3
C) 8B/10B; MLT-3
D) 4B/5B; NRZ-I
Answer: Option D
Solution:
39. Which of the following could not be an Ethernet unicast destination?
A) 46:56:21:1A:DE:F4
B) 43:7B:6C:DE:10:00
C) 48:32:21:21:4D:34
D) 44:AA:C1:23:45:32
Answer: Option B
Solution:
40. _________ uses thick coaxial cable.
A) 10Base2
B) 10Base5
C) 10Base-F
D) 10Base-T
Answer: Option B
Solution:
41. The IEEE 802.3 Standard defines _________ CSMA/CD as the access method for first-generation 10-Mbps Ethernet.
A) non-persistent
B) p-persistent
C) 1-persistent
D) none of the above
Answer: Option C
Solution:
42. _________ uses four twisted-pair cables that connect each station to a common hub.
A) 10Base-F
B) 10Base-T
C) 10Base5
D) 10Base2
Answer: Option B
Solution:
NEXT: MCQ in Wireless LANs
Complete List of Chapter Quiz in Data Communications and Networking
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