2.9 LAN GUI Configuration Flashcards
Interpret the wireless LAN GUI configuration for client connectivity, such as WLAN creation, security settings, QoS profiles, and advanced settings. (24 cards)
Define:
BSSID
(Basic Service Set Identifier)
The MAC address of a wireless access point (AP).
Each AP has a unique BSSID, which differentiates it from other APs even if they share the same SSID.
What happens when an SSID is set to “hidden” in WLAN settings?
Clients must manually enter the SSID to connect.
Hidden SSIDs don’t appear in scans but are still detectable via network sniffing tools.
Fill in the blank:
The process of selecting the best Wi-Fi channel is called ______ ______ ______.
Dynamic Channel Selection
(DCS)
DCS reduces interference by automatically picking the least congested channel.
Why should you set the correct country code in WLAN?
To comply with regulations.
Different countries have limits on frequency use and power levels for wireless networks.
What does WPA2-PSK stand for?
Wi-Fi Protected Access 2 - Pre-Shared Key
This uses a shared passphrase for authentication; common in home and small office networks.
True or False:
WPA3 is more secure than WPA2.
True
WPA3 uses Simultaneous Authentication of Equals (SAE) to prevent brute-force attacks.
What happens when MAC filtering is enabled?
Only approved MAC addresses can connect.
This adds a layer of security but can be bypassed since MAC addresses can be spoofed.
Define:
802.1X authentication
A network access control framework.
802.1X uses a RADIUS server to authenticate users, often in enterprise networks.
List three common WLAN security modes.
- Open (No Security)
- WPA2-PSK (Pre-Shared Key)
- WPA2/WPA3-Enterprise (802.1X)
WPA3-Enterprise offers enhanced security with stronger encryption and authentication.
What is Wi-Fi Multimedia?
(WMM)
A feature that prioritizes traffic.
WMM improves performance for voice, video, best-effort, and background traffic.
Why is Quality of Service (QoS) important?
It prioritizes critical applications.
Ensures VoIP, video streaming, and gaming have stable connections without lag.
What is a QoS profile in WLAN configuration?
A set of rules that prioritizes different types of network traffic.
This ensures critical applications get the necessary bandwidth.
What are the four common WLAN QoS profiles?
- Voice
- Video
- Best Effort
- Background
Voice: Highest priority (VoIP)
Video: High priority (Streaming)
Best Effort: Normal priority (General traffic)
Background: Lowest priority (Non-urgent tasks)
What happens when a WLAN QoS profile is set to “Best Effort”?
Traffic is treated with normal priority.
Best Effort is the default profile in most networks, meaning data is transmitted as bandwidth allows without prioritization.
True or False:
The “Background” QoS profile is used for high-priority applications.
False
The Background profile is for non-essential traffic like system updates or downloads, ensuring critical applications remain unaffected.
Fill in the blank:
The protocol that reserves bandwidth for real-time applications is ________.
IEEE 802.11e
This standard improves network efficiency by prioritizing delay-sensitive traffic.
What happens when bandwidth management is applied?
It limits speed per user/device.
This prevents congestion by ensuring fair bandwidth distribution among multiple clients.
True or False:
Traffic shaping prioritizes packets based on application type.
True
Traffic shaping regulates bandwidth to ensure smoother network performance.
What is Fast Roaming (802.11r) in WLAN settings?
A feature that allows seamless transition between APs for mobile users.
This reduces authentication time to prevent connection drops in enterprise environments.
Define:
Client Isolation
A security feature that blocks device-to-device communication.
This is often used in guest networks to prevent security risks from unauthorized access.
What is the use of band steering?
To shift devices to 5 GHz.
Band steering reduces congestion on the 2.4 GHz band and improves speed and stability.
List three factors affecting Wi-Fi performance.
- Signal interference
- Number of devices per AP
- Channel congestion
Signal Interference: Disruptions from other devices.
Number of Devices per AP: More devices mean shared bandwidth and slower speeds.
Channel Congestion: Overlapping Wi-Fi channels.
Fill in the blank:
The process of adjusting transmit power to reduce interference is called _____ _____ _____.
Adaptive RF Management
(ARM)
Adaptive RF Management (ARM) optimizes wireless coverage to improve connectivity.
What happens with excessive co-channel interference?
APs compete for the same frequency.
This leads to slower speeds and increased latency, degrading network performance.
