These 50 MCQs cover Guided (Wired) and Unguided (Wireless) Transmission Media, including Twisted Pair, Coaxial, Fiber Optic, Wi-Fi, Bluetooth, and Satellite.
1. Which of the following is NOT a guided transmission medium?
a) Twisted Pair
b) Coaxial Cable
c) Fiber Optic
d) Microwave
Answer: d) Microwave
2. What is the most common type of cable used in Ethernet networks?
a) Coaxial
b) Fiber Optic
c) Twisted Pair
d) Satellite
Answer: c) Twisted Pair
3. Which type of twisted pair cable is more resistant to interference?
a) UTP (Unshielded Twisted Pair)
b) STP (Shielded Twisted Pair)
c) FTP (Foiled Twisted Pair)
d) Coaxial
Answer: b) STP (Shielded Twisted Pair)
4. What is the maximum speed of Cat 6 twisted pair cable?
a) 100 Mbps
b) 1 Gbps
c) 10 Gbps
d) 100 Gbps
Answer: c) 10 Gbps
5. Which connector is commonly used with twisted pair cables?
a) BNC
b) RJ45
c) SC
d) ST
Answer: b) RJ45
6. Coaxial cables are primarily used in which applications?
a) Ethernet LANs
b) Cable TV & Broadband
c) Fiber Optic Networks
d) Wireless Networks
Answer: b) Cable TV & Broadband
7. Which type of cable has a central conductor surrounded by insulation and a metallic shield?
a) Twisted Pair
b) Coaxial
c) Fiber Optic
d) USB
Answer: b) Coaxial
8. What is the main advantage of fiber optic cables over copper cables?
a) Lower cost
b) Higher bandwidth & immunity to EMI
c) Easier installation
d) Shorter distance coverage
Answer: b) Higher bandwidth & immunity to EMI
9. Which type of fiber optic cable allows multiple light paths?
a) Single-mode
b) Multimode
c) Coaxial
d) Twisted Pair
Answer: b) Multimode
10. What is the typical core diameter of a single-mode fiber optic cable?
a) 50 µm
b) 62.5 µm
c) 9 µm
d) 100 µm
Answer: c) 9 µm
11. Which connector is commonly used in fiber optic networks?
a) RJ45
b) BNC
c) SC/LC
d) USB
Answer: c) SC/LC
12. Which transmission medium provides the highest data transfer rate?
a) Twisted Pair
b) Coaxial
c) Fiber Optic
d) Infrared
Answer: c) Fiber Optic
13. What is the maximum distance for Ethernet over UTP (Cat 6)?
a) 50 meters
b) 100 meters
c) 200 meters
d) 500 meters
Answer: b) 100 meters
14. Which type of interference affects twisted pair cables the most?
a) EMI (Electromagnetic Interference)
b) RFI (Radio Frequency Interference)
c) Crosstalk
d) All of the above
Answer: d) All of the above
15. What is the purpose of shielding in STP cables?
a) To increase speed
b) To reduce interference
c) To extend distance
d) To reduce cost
Answer: b) To reduce interference
16. Which cable type is used for underwater communications?
a) Twisted Pair
b) Coaxial
c) Fiber Optic
d) Ethernet
Answer: c) Fiber Optic
17. What is the primary disadvantage of fiber optic cables?
a) High cost
b) Limited bandwidth
c) Susceptibility to EMI
d) Short transmission distance
Answer: a) High cost
18. Which type of cable is used in 10BASE2 Ethernet networks?
a) UTP
b) STP
c) Thin Coaxial (RG-58)
d) Fiber Optic
Answer: c) Thin Coaxial (RG-58)
19. What is the maximum bandwidth of multimode fiber?
a) 100 Mbps
b) 1 Gbps
c) 10 Gbps
d) 100 Gbps
Answer: d) 100 Gbps (with OM5 fiber)
20. Which transmission medium is used in telephone lines?
a) Coaxial
b) Twisted Pair
c) Fiber Optic
d) Microwave
Answer: b) Twisted Pair
21. Which of the following is NOT a fiber optic cable type?
a) Single-mode
b) Multimode
c) Coaxial
d) OM3
Answer: c) Coaxial
22. Which cable type is immune to electromagnetic interference (EMI)?
a) UTP
b) Coaxial
c) Fiber Optic
d) STP
Answer: c) Fiber Optic
23. What is the maximum transmission distance for single-mode fiber?
a) 100 meters
b) 2 km
c) 40 km
d) 100 km
Answer: d) 100 km (with repeaters)
24. Which Ethernet standard uses fiber optic cables?
a) 10BASE-T
b) 100BASE-TX
c) 1000BASE-SX
d) 10BASE2
Answer: c) 1000BASE-SX
25. What is the main advantage of coaxial cables over UTP?
a) Lower cost
b) Higher bandwidth & longer distance
c) Easier installation
d) No need for connectors
Answer: b) Higher bandwidth & longer distance
26. Which of the following is an unguided transmission medium?
a) Twisted Pair
b) Coaxial
c) Microwave
d) Fiber Optic
Answer: c) Microwave
27. Which wireless technology uses 2.4 GHz and 5 GHz frequencies?
a) Bluetooth
b) Wi-Fi (802.11)
c) Infrared
d) Satellite
Answer: b) Wi-Fi (802.11)
28. What is the range of Bluetooth communication?
a) 1 meter
b) 10 meters
c) 100 meters
d) 1 km
Answer: b) 10 meters (Class 2)
29. Which wireless medium uses light waves for communication?
a) Microwave
b) Infrared
c) Radio Waves
d) Satellite
Answer: b) Infrared
30. Which wireless technology is used for mobile phone communication?
a) Wi-Fi
b) Bluetooth
c) Cellular (4G/5G)
d) NFC
Answer: c) Cellular (4G/5G)
31. What is the main disadvantage of satellite communication?
a) Low bandwidth
b) High latency
c) Short range
d) High cost
Answer: b) High latency (due to distance)
32. Which wireless technology is used for contactless payments?
a) Wi-Fi
b) NFC
c) Bluetooth
d) Zigbee
Answer: b) NFC
33. Which frequency band is used by microwave communication?
a) 300 MHz – 3 GHz
b) 3 GHz – 30 GHz
c) 30 GHz – 300 GHz
d) 1 Hz – 300 Hz
Answer: b) 3 GHz – 30 GHz
34. Which wireless technology is used in IoT devices like smart home sensors?
a) Wi-Fi
b) Zigbee
c) Satellite
d) NFC
Answer: b) Zigbee
35. What is the primary advantage of wireless transmission?
a) Higher security
b) No physical cables needed
c) Lower cost than wired
d) Unlimited bandwidth
Answer: b) No physical cables needed
36. Which wireless technology has the longest range?
a) Wi-Fi
b) Bluetooth
c) Satellite
d) NFC
Answer: c) Satellite
37. Which wireless standard operates at 60 GHz?
a) Wi-Fi 6
b) 5G
c) 802.11ad (WiGig)
d) Bluetooth 5.0
Answer: c) 802.11ad (WiGig)
38. Which wireless medium is used in remote controls?
a) Microwave
b) Infrared
c) Radio Waves
d) Satellite
Answer: b) Infrared
39. What is the main limitation of infrared communication?
a) Short range & line-of-sight required
b) High interference
c) High power consumption
d) Expensive hardware
Answer: a) Short range & line-of-sight required
40. Which wireless technology is used for long-range rural internet?
a) Wi-Fi
b) Cellular
c) Microwave links
d) NFC
Answer: c) Microwave links
41. Which wireless standard is used for low-power, short-range IoT devices?
a) Wi-Fi
b) Zigbee
c) 5G
d) Satellite
Answer: b) Zigbee
42. Which wireless technology is used in GPS systems?
a) Wi-Fi
b) Bluetooth
c) Satellite
d) NFC
Answer: c) Satellite
43. What is the main advantage of 5G over 4G?
a) Lower latency & higher speed
b) Longer range
c) Lower cost
d) Less power consumption
Answer: a) Lower latency & higher speed
44. Which wireless medium is susceptible to weather interference?
a) Microwave
b) Infrared
c) Satellite
d) All of the above
Answer: d) All of the above
45. Which wireless technology is used for wireless charging?
a) NFC
b) RFID
c) Inductive Coupling
d) Bluetooth
Answer: c) Inductive Coupling
46. Which wireless standard is used for high-speed short-range data transfer?
a) Wi-Fi 6
b) Bluetooth
c) UWB (Ultra-Wideband)
d) Zigbee
Answer: c) UWB (Ultra-Wideband)
47. Which wireless technology is used in RFID tags?
a) NFC
b) Bluetooth
c) Wi-Fi
d) Satellite
Answer: a) NFC (a subset of RFID)
48. What is the main security risk in wireless networks?
a) High cost
b) Signal interference
c) Unauthorized access
d) Limited bandwidth
Answer: c) Unauthorized access
49. Which wireless technology is used in smartwatches for calls?
a) Wi-Fi
b) Bluetooth
c) Cellular
d) NFC
Answer: c) Cellular (e.g., LTE in smartwatches)
50. Which wireless medium is used in military radar systems?
a) Microwave
b) Infrared
c) Radio Waves
d) Satellite
Answer: a) Microwave