Aruba Associate Wireless Technologies 1 — Questions and Answers
Question 1: Which frequency band provides wider coverage but lower speed?
- 5 GHz
- 6 GHz
- 2.4 GHz (Correct answer)
- 10 GHz
Correct answer: 2.4 GHz
The 2.4 GHz frequency band offers wider coverage and better penetration through walls and obstacles compared to higher frequencies like 5 GHz. However, it typically provides lower data speeds and is more susceptible to interference from other devices, such as microwaves and Bluetooth. This trade-off makes it suitable for applications prioritizing range over raw speed.
Question 2: What is the role of SSID in wireless networks?
- Identifies a network's IP range
- Assigns MAC addresses
- Broadcasts the wireless network name (Correct answer)
- Provides firewall protection
Correct answer: Broadcasts the wireless network name
SSID stands for Service Set Identifier, and it is essentially the name of a wireless network. When an access point broadcasts its SSID, it allows client devices to discover and connect to that specific Wi-Fi network. Users typically select the desired SSID from a list of available networks to join.
Question 3: Which Wi-Fi standard first introduced MIMO technology?
- 802.11a
- 802.11n (Correct answer)
- 802.11b
- 802.11g
Correct answer: 802.11n
The 802.11n Wi-Fi standard, also known as Wi-Fi 4, was the first to introduce Multiple-Input, Multiple-Output (MIMO) technology. MIMO uses multiple antennas at both the transmitter and receiver to improve communication performance, increasing both data throughput and range. This was a significant advancement over previous Wi-Fi standards.
Question 4: Which of the following is a benefit of using 5 GHz Wi-Fi?
- Wider coverage
- Lower frequency
- Higher speed and less interference (Correct answer)
- More device support
Correct answer: Higher speed and less interference
The 5 GHz Wi-Fi band offers significantly higher data speeds and less interference compared to the 2.4 GHz band because it has more available channels and is less congested. While its range is generally shorter and penetration through objects is weaker, it is ideal for bandwidth-intensive applications like video streaming and online gaming.
Question 5: What is the function of a wireless access point (AP)?
- Connects to a printer
- Assigns IP addresses
- Provides wireless network access (Correct answer)
- Acts as a DNS server
Correct answer: Provides wireless network access
A wireless access point (AP) is a networking hardware device that allows Wi-Fi compliant devices to connect to a wired network. It acts as a central hub for wireless clients, converting wireless signals into wired signals and vice-versa, thereby extending network connectivity wirelessly. Essentially, it creates a wireless local area network (WLAN).
Question 6: Which authentication method is commonly used in enterprise wireless environments?
- WEP
- 802.1X (Correct answer)
- PSK
- SSID
Correct answer: 802.1X
802.1X is an IEEE standard for port-based network access control, widely used in enterprise wireless environments for robust authentication. It provides a framework for authenticating users and devices before granting them access to the network, often integrating with RADIUS servers for centralized policy management. This offers much stronger security than simpler methods like WEP or PSK.
Aruba Associate Wireless Technologies 1
Which frequency band provides wider coverage but lower speed?