Telecommunications Wireless Communications 1 — Questions and Answers
Question 1: Which Wi-Fi standard introduced the 5 GHz band?
- 802.11b
- 802.11a (Correct answer)
- 802.11g
- 802.11n
Correct answer: 802.11a
IEEE 802.11a was the first standard to use the 5 GHz frequency band, operating at speeds up to 54 Mbps.
Question 2: What does SSID stand for in wireless networking?
- Secure Signal Identification Device
- Service Set Identifier (Correct answer)
- Signal Strength Indicator Display
- Subnet System ID
Correct answer: Service Set Identifier
SSID (Service Set Identifier) is the name that identifies a specific wireless network.
Question 3: What wireless security protocol replaced WEP due to its vulnerabilities?
- WPA (Correct answer)
- AES
- TKIP
- SSID
Correct answer: WPA
WPA (Wi-Fi Protected Access) was introduced to address WEP's significant security weaknesses.
Question 4: Which Wi-Fi standard is also known as Wi-Fi 6?
- 802.11ac
- 802.11ax (Correct answer)
- 802.11n
- 802.11ad
Correct answer: 802.11ax
IEEE 802.11ax is branded as Wi-Fi 6 and offers improved performance in dense environments with speeds up to 9.6 Gbps.
Question 5: What is the primary advantage of 5 GHz over 2.4 GHz Wi-Fi?
- Longer range
- More channels and less interference (Correct answer)
- Better wall penetration
- Lower power consumption
Correct answer: More channels and less interference
The 5 GHz band offers more non-overlapping channels and less interference from devices like microwaves and cordless phones.
Question 6: What does MIMO stand for in wireless communications?
- Minimum Input Maximum Output
- Multiple Input Multiple Output (Correct answer)
- Multi-Instance Mobile Operation
- Modulated Input Modulated Output
Correct answer: Multiple Input Multiple Output
MIMO (Multiple Input Multiple Output) uses multiple antennas to transmit and receive data simultaneously, increasing throughput.
Telecommunications Wireless Communications 1
Which Wi-Fi standard introduced the 5 GHz band?