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1. Which IEEE standard defines traditional Ethernet?
   a. IEEE 802.11
   b. IEEE 802.3
   c. IEEE 802.1Q
   d. IEEE 802.15
   Answer: b. IEEE 802.3study-ccna+1
2. What is the data rate of 10Base-T Ethernet?
   a. 10 Mbps
   b. 100 Mbps
   c. 1000 Mbps
   d. 1 Mbps
   Answer: a. 10 Mbpsautomationcommunity+1
3. Which cable category is typically used with 100Base-TX Ethernet?
   a. Cat 3
   b. Cat 5e
   c. Cat 6a
   d. Cat 1
   Answer: b. Cat 5eelandcables+1
4. What term does “BASE” in 10Base-T refer to?
   a. Broadband signaling
   b. Baseband signaling
   c. Basic cabling
   d. Backup power
   Answer: b. Baseband signalingwatelectronics+1
5. In Ethernet, which layer does MAC operate at in OSI model?
   a. Network layer
   b. Data Link layer
   c. Transport layer
   d. Physical layer
   Answer: b. Data Link layernetometer+1
6. Which standard supports Gigabit Ethernet over twisted pair?
   a. 1000BASE-T
   b. 10BASE-T
   c. 100BASE-TX
   d. 1000BASE-LX
   Answer: a. 1000BASE-Twikipedia+1
7. The maximum length for 100Base-TX cable is:
   a. 10 meters
   b. 100 meters
   c. 1000 meters
   d. 1 meter
   Answer: b. 100 metersstudy-ccna+1
8. Which physical topology was originally used with Ethernet?
   a. Ring
   b. Star
   c. Bus
   d. Mesh
   Answer: c. Bustestbook+1
9. What is the twisted pair cable used for 10Base-T Ethernet?
   a. Fiber optic
   b. Coaxial cable
   c. Unshielded twisted pair (UTP)
   d. Shielded twisted pair (STP)
   Answer: c. Unshielded twisted pair (UTP)elandcables+1
10. The MAC address used in Ethernet frames is how many bits?
    a. 32 bits
    b. 48 bits
    c. 16 bits
    d. 64 bits
    Answer: b. 48 bitssanfoundry+1
11. Which standard defines Fast Ethernet?
    a. IEEE 802.3u
    b. IEEE 802.1Q
    c. IEEE 802.11g
    d. IEEE 802.6
    Answer: a. IEEE 802.3ulantronix+1
12. What is the speed of Fast Ethernet?
    a. 10 Mbps
    b. 100 Mbps
    c. 1000 Mbps
    d. 1 Mbps
    Answer: b. 100 Mbpsautomationcommunity+1
13. Which encoding is used in Fast Ethernet 100Base-TX?
    a. Manchester
    b. NRZ
    c. 4B/5B
    d. Bipolar
    Answer: c. 4B/5Bscribd+1
14. What does “T” represent in Ethernet standards (e.g., 1000Base-T)?
    a. Token ring
    b. Twisted pair cable
    c. Transmission
    d. Timing
    Answer: b. Twisted pair cablestudy-ccna+1
15. What is the standard for Ethernet over fiber optics at 1 Gbps?
    a. 1000Base-T
    b. 1000Base-SX
    c. 100Base-FX
    d. 100Base-TX
    Answer: b. 1000Base-SXtestbook+1
16. What is the function of SFD in Ethernet frame?
    a. Provides source address
    b. Indicates start of frame
    c. Reports errors
    d. Sets transmission rate
    Answer: b. Indicates start of framesanfoundry+1
17. What type of cable is typically used for 10GBase-T Ethernet?
    a. Cat 5e
    b. Cat 6/6a/7
    c. Cat 3
    d. Cat 2
    Answer: b. Cat 6/6a/7elandcables+1
18. Which IEEE standard defines Ethernet frame format and CSMA/CD?
    a. IEEE 802.3
    b. IEEE 802.5
    c. IEEE 802.11
    d. IEEE 802.1X
    Answer: a. IEEE 802.3netometer+1
19. The term “autonegotiation” in Ethernet means:
    a. Setting MAC address automatically
    b. Choosing best speed & duplex automatically
    c. Auto IP assignment
    d. Automatic device addressing
    Answer: b. Choosing best speed & duplex automaticallywatelectronics+1
20. What is the maximum transmission speed for Cat6a cable?
    a. 1 Gbps
    b. 5 Gbps
    c. 10 Gbps
    d. 100 Gbps
    Answer: c. 10 Gbpselandcables+1
21. What does PoE stand for in Ethernet?
    a. Power on Error
    b. Priority over Ethernet
    c. Power over Ethernet
    d. Packets over Ethernet
    Answer: c. Power over Ethernetwikipedia+1
22. Which IEEE standard adds VLAN tagging to Ethernet?
    a. 802.3u
    b. 802.1Q
    c. 802.11g
    d. 802.2
    Answer: b. 802.1Qieee802+1
23. What is the minimum Ethernet frame size (excluding preamble)?
    a. 46 bytes
    b. 64 bytes
    c. 128 bytes
    d. 512 bytes
    Answer: b. 64 bytessanfoundry+1
24. What technology is used for collision detection in traditional Ethernet?
    a. Token passing
    b. CSMA/CD
    c. FDDI
    d. PPP
    Answer: b. CSMA/CDnetometer+1
25. Which standard introduced Gigabit Ethernet?
    a. IEEE 802.3z
    b. IEEE 802.3u
    c. IEEE 802.1Q
    d. IEEE 802.2
    Answer: a. IEEE 802.3ztestbook+1
26. Which is NOT a common Ethernet physical topology?
    a. Ring
    b. Bus
    c. Star
    d. Tree
    Answer: a. Ringexamtray+1
27. The maximum length for 1000Base-T cable is:
    a. 10 meters
    b. 100 meters
    c. 1000 meters
    d. 1 meter
    Answer: b. 100 metersstudy-ccna+1
28. What does “MTU” stand for?
    a. Modular Transmission Unit
    b. Maximum Transfer Unit
    c. Maximum Transmission Unit
    d. Minimum Transmission Unit
    Answer: c. Maximum Transmission Unitlantronix+1
29. Which cable is used for 100Base-FX Ethernet?
    a. Twisted pair
    b. Coaxial
    c. Fiber optic
    d. Serial cable
    Answer: c. Fiber opticwatelectronics+1
30. What is the purpose of FCS in Ethernet frame?
    a. Frame Control Signal
    b. Frame Correction Service
    c. Frame Check Sequence
    d. Frame Channel Switch
    Answer: c. Frame Check Sequenceexamtray+1
31. What topology do most modern Ethernet networks use physically?
    a. Bus
    b. Star
    c. Ring
    d. Tree
    Answer: b. Startestbook+1
32. Which layer of OSI model does Ethernet mainly operate at?
    a. Network
    b. Data link & physical
    c. Application
    d. Presentation
    Answer: b. Data link & physicalgeeksforgeeks+1
33. What is “jumbo frame” in Ethernet?
    a. A frame bigger than 1500 bytes
    b. A frame with only control information
    c. A frame with VLAN tag
    d. A frame sent over wireless
    Answer: a. A frame bigger than 1500 byteswikipedia+1
34. 10GBase-LR is defined for which type of cabling?
    a. Twisted pair
    b. Coaxial
    c. Single-mode fiber
    d. Power lines
    Answer: c. Single-mode fiberwikipedia+1
35. Which IEEE standard supports automotive Ethernet?
    a. IEEE 802.3bw
    b. IEEE 802.11p
    c. IEEE 802.3z
    d. IEEE 802.1Q
    Answer: a. IEEE 802.3bwelandcables+1
36. Which cable category is obsolete for standard Ethernet today?
    a. Cat 5e
    b. Cat 3
    c. Cat 6
    d. Cat 7
    Answer: b. Cat 3study-ccna+1
37. Which Ethernet standard supports 400 Gbps?
    a. 802.3bs
    b. 802.3bt
    c. 802.3z
    d. 802.3u
    Answer: a. 802.3bswikipedia
38. VLAN tagging uses which protocol?
    a. STP
    b. 802.1Q
    c. ARP
    d. CSMA/CD
    Answer: b. 802.1Qieee802+1
39. Which type of signaling does Ethernet use?
    a. Broadband
    b. Baseband
    c. Pulse code modulation
    d. Frequency division
    Answer: b. Basebandautomationcommunity+1
40. What is the standard for Power over Data Lines (PoDL)?
    a. 802.3bu
    b. 802.3bz
    c. 802.3bv
    d. 802.1Q
    Answer: a. 802.3buwikipedia
41. What is the maximum transmission speed of Cat 7 cable?
    a. 10 Mbps
    b. 100 Mbps
    c. 10 Gbps
    d. 100 Gbps
    Answer: c. 10 Gbpselandcables
42. What does “LLC” stand for in IEEE 802.2?
    a. Logical Link Connection
    b. Last Layer Carrier
    c. Logical Link Control
    d. Link Loss Correction
    Answer: c. Logical Link Controlnetometer
43. Multimode fiber is used in which Gigabit Ethernet standard?
    a. 1000Base-T
    b. 1000Base-SX
    c. 1000Base-LX
    d. 100Base-TX
    Answer: b. 1000Base-SXtestbook+1
44. What is the minimum CAT cable required for Gigabit Ethernet?
    a. Cat 3
    b. Cat 5
    c. Cat 6a
    d. Cat 5e
    Answer: d. Cat 5estudy-ccna+1
45. CSMA/CD operates only in what type of network?
    a. Wireless
    b. Full-duplex
    c. Half-duplex Ethernet
    d. Point-to-point
    Answer: c. Half-duplex Ethernetnetometer+1
46. What is the role of the preamble in Ethernet frame?
    a. Error checking
    b. Frame synchronization
    c. Address resolution
    d. Encryption
    Answer: b. Frame synchronizationsanfoundry+1
47. Which IEEE standard defines 200Gbps Ethernet?
    a. 802.3bt
    b. 802.3bs
    c. 802.3bu
    d. 802.3br
    Answer: b. 802.3bswikipedia
48. Which cabling type is used for 1000Base-CX?
    a. Twisted pair
    b. Coaxial
    c. Fiber optic
    d. Serial
    Answer: a. Twisted pairwatelectronics+1
49. What does 4PPoE refer to in Ethernet?
    a. Four Power Pairs over Ethernet
    b. Four Packet Protocol over Ethernet
    c. Fast PoE over Ethernet
    d. Fiber Point-to-Point Ethernet
    Answer: a. Four Power Pairs over Ethernetwikipedia
50. Which IEEE standard includes Power over Ethernet up to 100W?
    a. 802.3bu
    b. 802.3bt
    c. 802.3bx
    d. 802.3av
    Answer: b. 802.3btelandcables+1

1. https://study-ccna.com/ieee-ethernet-standards/
2. https://en.wikipedia.org/wiki/IEEE_802.3
3. https://automationcommunity.com/ethernet-questions-and-answers/
4. https://www.elandcables.com/the-cable-lab/faqs/faq-what-are-the-ethernet-standards
5. https://www.watelectronics.com/mcq/ethernet/
6. https://www.netometer.com/video/tutorials/ethernet/
7. https://www.geeksforgeeks.org/computer-networks/what-is-ethernet/
8. https://testbook.com/objective-questions/mcq-on-ethernet–5eea6a0939140f30f369d916
9. https://www.examtray.com/networking/ethernet-802-3-concepts-network-topology-mcq-questions-answers
10. https://www.sanfoundry.com/computer-networks-questions-answers-ethernet/
11. https://www.lantronix.com/resources/networking-tutorials/ethernet-tutorial-networking-basics/
12. https://www.scribd.com/document/711017424/Telecom-Chapter-5-MCQ
13. https://testbook.com/question-answer/which-of-the-following-is-the-standard-implementat–61a5df02c8ecca997adfc65e
14. https://www.ieee802.org
15. https://www.scribd.com/document/419464159/MCQ-13
16. https://www.iana.org/assignments/ieee-802-numbers
17. https://www.placementpreparation.io/mcq/computer-network/page/2/
18. https://study.com/academy/practice/quiz-worksheet-ethernet-standards-frames.html
19. https://www.interviewbit.com/networking-interview-questions/
20. https://www.gdcramban.in/MCQ/networkmcq.pdf