Wireless Networks Flashcards
What is a wireless network?
A network that extends connectivity without physical cables.
What are the two main types of wireless networks?
Ad hoc and Infrastructure Mode.
What is an Ad Hoc wireless network?
A peer-to-peer wireless network without a central access point.
What is an Infrastructure wireless network?
A network where devices connect through a centralized access point.
What are the three main wireless frequency bands?
2.4 GHz, 5 GHz, and 6 GHz.
Which wireless frequency band has the longest range?
2.4 GHz.
Which wireless frequency band offers the highest speeds?
6 GHz.
What does SSID stand for?
Service Set Identifier.
What is the purpose of SSID?
It is the network name used to identify a wireless network.
What are the three main types of wireless antennas?
Omnidirectional, Unidirectional, Yagi.
What is the function of an Omnidirectional antenna?
Broadcasts signals equally in all directions.
What is the function of a Unidirectional antenna?
Focuses signal in a single direction for better range.
What is a Yagi antenna used for?
Long-distance, high-gain signal transmission.
What are the main security protocols for Wi-Fi?
WEP, WPA, WPA2, WPA3.
Why is WEP considered insecure?
It uses weak encryption and can be cracked easily.
What does WPA stand for?
Wi-Fi Protected Access.
Which Wi-Fi security protocol is the most secure?
WPA3.
What is MAC filtering in wireless networks?
Restricting network access based on device MAC addresses.
What is the purpose of a captive portal?
To authenticate users before granting network access.
How does band steering improve wireless performance?
Automatically directs devices to the optimal frequency band.
What is the maximum speed of 802.11ac (Wi-Fi 5)?
Up to 6.9 Gbps.
What frequency band does 802.11ax (Wi-Fi 6) use?
2.4 GHz, 5 GHz, and 6 GHz (Wi-Fi 6E).
What is the advantage of MIMO technology?
Uses multiple antennas to increase data transfer rates.
What does WPS stand for?
Wi-Fi Protected Setup.
Why is WPS considered a security risk?
It has a design flaw that makes it vulnerable to brute-force attacks.
What is an Extended Service Set (ESS)?
A network with multiple access points sharing the same SSID.
What does 802.1X provide for Wi-Fi networks?
Enterprise authentication with a RADIUS server.
What is an example of a Point-to-Point wireless network?
A long-distance wireless link between two buildings.
What is a Mesh Network?
A self-healing, interconnected network with multiple nodes.
What is a primary benefit of Wireless Isolation?
Prevents wireless clients from communicating with each other.
