Mod. 1 - Intro To Wlans | Attempts: 111 - Quiz, Trivia & Questions

1.

What are the two most commonly used RF frequencies used for wireless Networking?(Choose all that apply)
- A.
  
  900 MHz
- B.
  
  5.0 GHz
- C.
  
  100 Mbps
- D.
  
  2.4 GHz
- E.
  
  2.4 MHz
Correct Answer(s)
B. 5.0 GHz
D. 2.4 GHz

Explanation
The two most commonly used RF frequencies for wireless networking are 5.0 GHz and 2.4 GHz. These frequencies are widely used because they offer a good balance between range and bandwidth. The 5.0 GHz frequency provides higher bandwidth and faster data transfer rates, making it suitable for applications that require high-speed connections. On the other hand, the 2.4 GHz frequency has a longer range and better penetration through walls and obstacles, making it more suitable for wider coverage areas. Therefore, both frequencies are commonly used in wireless networking to accommodate different needs and environments.

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2.

Wireless networks eliminate the need for an ISP?
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
Wireless networks do not eliminate the need for an ISP. While wireless networks provide a means of connecting devices to the internet without the use of physical cables, they still require an internet service provider (ISP) to connect to the internet. The ISP is responsible for providing the internet connection, managing network infrastructure, and routing data between devices and the internet. Therefore, wireless networks and ISPs work together to enable internet connectivity.

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3.

Signaling techologies use which of the following?(Choose all that apoly)
- A.
  
  VHSS
- B.
  
  OFDM
- C.
  
  DSSS
- D.
  
  IR Light
- E.
  
  FHSS
Correct Answer(s)
B. OFDM
C. DSSS
E. FHSS

Explanation
Signaling technologies use a combination of OFDM (Orthogonal Frequency Division Multiplexing), DSSS (Direct Sequence Spread Spectrum), and FHSS (Frequency Hopping Spread Spectrum) techniques. OFDM allows for the transmission of multiple signals simultaneously by dividing the frequency spectrum into orthogonal subcarriers. DSSS spreads the signal over a wide frequency band, increasing its resistance to interference. FHSS involves rapidly changing frequencies during transmission, making it difficult for unauthorized users to intercept the signal. These technologies are commonly used in wireless communication systems to ensure reliable and efficient data transmission.

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4.

Choose the most secure feature of wireless networking.
- A.
  
  SSID
- B.
  
  WEP key
- C.
  
  Channel Selection
- D.
  
  Power setting
Correct Answer
B. WEP key

Explanation
The WEP key is the most secure feature of wireless networking because it provides encryption for data transmitted over the network. It helps to prevent unauthorized access to the network and protect sensitive information from being intercepted by hackers. The WEP key is a password or passphrase that needs to be entered by users in order to connect to the wireless network, ensuring that only authorized individuals can access the network.

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5.

What is the wireless networking medium?
- A.
  
  STP
- B.
  
  UTP
- C.
  
  Coax
- D.
  
  Fiber Optic
- E.
  
  Atmosphere
Correct Answer
E. AtmospHere

Explanation
The wireless networking medium refers to the physical environment through which wireless signals travel. In this context, the atmosphere is the correct answer as it is the medium through which wireless signals, such as Wi-Fi or cellular signals, propagate. The atmosphere allows for the transmission of these signals, enabling wireless communication between devices.

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6.

What IEEE committee and its working groups authors the wireless networking standards?
- A.
  
  802.3
- B.
  
  802.4
- C.
  
  802.14
- D.
  
  802.11
- E.
  
  802.16
Correct Answer
D. 802.11

Explanation
The correct answer is 802.11. The IEEE 802.11 committee and its working groups are responsible for authoring the wireless networking standards. These standards define the protocols and technologies used in wireless local area networks (WLANs), commonly known as Wi-Fi. The committee and its working groups continuously work on developing and updating these standards to ensure interoperability and compatibility among different wireless devices and networks.

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7.

What is considered the center point of a standalone wireless network?
- A.
  
  AP
- B.
  
  Wireless NIC
- C.
  
  Antenna
- D.
  
  Bridge
- E.
  
  RF signal
Correct Answer
A. AP

Explanation
The center point of a standalone wireless network is the Access Point (AP). The AP acts as a central hub that connects wireless devices to the network and allows them to communicate with each other. It serves as a bridge between the wireless devices and the wired network, enabling data transmission and providing network access. The AP is responsible for managing the network, controlling the wireless signals, and ensuring seamless connectivity for the devices within the network.

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8.

What is the primary cause of WLAN signal degradation?
- A.
  
  Sunspot activity
- B.
  
  Other WLANs
- C.
  
  Flux capacitors
- D.
  
  Interference
- E.
  
  EMP
Correct Answer
D. Interference

Explanation
The primary cause of WLAN signal degradation is interference. Interference can occur when other devices or signals operate on the same frequency as the WLAN, causing disruptions in the signal transmission. This can result in slower connection speeds, dropped connections, and overall poor performance. Interference can come from various sources such as other wireless networks, microwave ovens, cordless phones, and even physical obstacles like walls or furniture. It is important to identify and minimize sources of interference to ensure a stable and reliable WLAN connection.

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9.

Interference that comes from some other transmitting source is called what?
- A.
  
  EMI
- B.
  
  TCO
- C.
  
  RFI
- D.
  
  VPN
- E.
  
  LOS
Correct Answer
C. RFI

Explanation
RFI stands for Radio Frequency Interference. It refers to interference that occurs when a transmitting source, such as another electronic device or equipment, disrupts the normal functioning of a radio signal or communication system. RFI can cause interruptions, distortions, or complete loss of signal, affecting the quality and reliability of wireless communication.

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10.

Which of the following are benefits provided by WLANs?(Choose all that apply)
- A.
  
  Mobility
- B.
  
  Installation advantages
- C.
  
  Flexibility
- D.
  
  Fastest speed
- E.
  
  Reduced installation time
Correct Answer(s)
A. Mobility
B. Installation advantages
C. Flexibility
E. Reduced installation time

Explanation
WLANs, or wireless local area networks, provide several benefits. One of the benefits is mobility, as users can access the network from anywhere within the coverage area. Another benefit is installation advantages, as WLANs do not require the installation of physical cables. WLANs also offer flexibility, allowing users to connect multiple devices without the need for additional wiring. Additionally, WLANs can reduce installation time compared to wired networks. However, the statement "Fastest speed" is not a benefit provided by WLANs.

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Mod. 1 - Intro To Wlans

What are the two most commonly used RF frequencies used for wireless Networking?(Choose all that apply)

Wireless networks eliminate the need for an ISP?

Signaling techologies use which of the following?(Choose all that apoly)

Choose the most secure feature of wireless networking.

What is the wireless networking medium?

What IEEE committee and its working groups authors the wireless networking standards?

What is considered the center point of a standalone wireless network?

What is the primary cause of WLAN signal degradation?

Interference that comes from some other transmitting source is called what?

Which of the following are benefits provided by WLANs?(Choose all that apply)