1.11 Wireless Principles Flashcards
Summarize wireless principles, such as non-overlapping wifi-channels, SSID, RF, and encryption. (20 cards)
What are nonoverlapping Wi-Fi channels in the 2.4 GHz band?
Channels 1, 6, and 11
Using channels 1, 6, and 11 in the 2.4 GHz band ensures minimal overlap, improving overall network performance.
What are the non-overlapping Wi-Fi channels in the 5 GHz band?
- 36
- 40
- 44
- 48
- 149
- 153
- 157
- 161
- 165
The 5 GHz band offers more non-overlapping channels than the 2.4 GHz band, reducing interference and providing more bandwidth for devices.
What are the benefits of non-overlapping channels in a wireless network?
- Reduced interference
- Increased bandwidth efficiency
- Better signal quality
Proper channel planning ensures minimal interference, reducing dropped connections and boosting overall network performance.
True or False:
The 2.4 GHz band has more than three nonoverlapping channels.
False
Due to the limited bandwidth of the 2.4 GHz band, only three nonoverlapping channels (1, 6, 11) are available for use.
What does SSID stand for?
Service Set Identifier
The SSID is used by devices to identify and connect to the appropriate wireless network.
What is the primary function of an SSID in a wireless network?
It identifies the network.
The SSID helps devices locate and connect to the correct network, with the option to hide it for additional security.
What is the maximum length for an SSID?
32 characters
The SSID can be up to 32 characters long, but shorter names are generally easier for users to remember and identify.
Why is hiding an SSID used as a security measure?
It makes the network less discoverable.
Hiding an SSID reduces visibility to casual users, but it relies on obscurity rather than strong security, as it does not prevent skilled attackers from identifying the network.
True or False:
Hiding the SSID prevents unauthorized network access.
False
Attackers can still discover the network using tools that reveal hidden SSIDs.
Define:
Radio Frequency
(RF)
The frequency used for wireless communication.
Wi-Fi operates on 2.4 GHz and 5 GHz RF bands to transmit data wirelessly.
How does RF affect Wi-Fi range and speed?
Lower frequencies provide more range but less speed.
The 2.4 GHz band offers better coverage, while the 5 GHz band supports faster speeds but shorter range.
How does RF interference impact wireless networks?
It degrades signal quality.
Interference from devices like microwaves or thick walls can cause slow speeds and dropped connections.
Which wireless standard uses the 2.4 GHz and 5 GHz RF bands?
Wi-Fi 5 (802.11ac) and Wi-Fi 6 (802.11ax)
These standards operate on both the 2.4 GHz and 5 GHz bands for improved performance and flexibility.
Why is encryption necessary in wireless networks?
To protect data privacy.
Encryption prevents unauthorized access to data transmitted over wireless networks, ensuring that sensitive information remains secure.
What does AES stand for?
Advanced Encryption Standard
AES (Advanced Encryption Standard) is the most secure encryption method used in WPA2 and WPA3 to protect data over Wi-Fi.
List the common encryption methods used in Wi-Fi networks.
- WEP(Wired Equivalent Privacy)
- WPA(Wi-Fi Protected Access)
- WPA2(Wi-Fi Protected Access 2)
- WPA3(Wi-Fi Protected Access 3)
WEP: An outdated encryption method with weak security.
WPA: An improvement over WEP, but still vulnerable to attacks.
WPA2: A widely used encryption method with stronger security, using AES.
WPA3: The latest encryption standard, offering improved security and protection against attacks.
How does WPA3 improve Wi-Fi security compared to WPA2?
It provides stronger encryption and better protection.
WPA3 features 192-bit encryption in enterprise networks and includes protections like Simultaneous Authentication of Equals (SAE) to prevent offline dictionary attacks.
Which encryption standard is commonly used in home Wi-Fi networks?
WPA2
WPA2, particularly with AES encryption, is widely used for securing home networks due to its strong security features.
True or False:
WEP is the most secure Wi-Fi encryption method.
False
WEP is outdated and vulnerable to attacks. It is no longer recommended for securing modern networks due to its weak encryption.
Fill in the blank:
The standard used for WPA2 encryption is ________.
AES
AES encryption ensures secure data transmission over Wi-Fi networks and is the recommended encryption method for WPA2.
