5 Wireless Networking Fundamentals Free Online FlashCards

What is a wireless local area network (WLAN)?

A WLAN connects devices over radio rather than through individual Ethernet cables.

What does an access point do in an infrastructure WLAN?

An access point provides wireless connectivity and bridges client traffic to the network.

How do a BSS and an ESS differ?

A BSS is a group of clients served by one AP radio. Multiple connected BSSs can form an ESS, letting clients move between APs using the same WLAN name and compatible security.

What do the SSID and BSSID identify?

The SSID names a WLAN; the BSSID identifies a particular BSS, commonly by the AP radio’s wireless MAC address.

How can a client discover a WLAN?

Clients discover WLANs through AP beacons or by sending probe requests, then authenticate and associate with an AP.

Does hiding an SSID provide strong security?

No. A hidden SSID can still be discovered and may complicate connections; strong authentication and encryption provide security.

What characterizes an autonomous AP?

An autonomous AP is configured and managed directly, without relying on a wireless LAN controller for its management.

What can a missing or self-assigned client IP address indicate?

A missing or self-assigned IP address often points to DHCP, VLAN, or relay-path problems. Also verify the client received suitable subnet mask, gateway, and DNS settings.

What is the role of a distribution system?

It connects APs and carries traffic toward switches, routers, and services such as DHCP and authentication servers.

What can a FlexConnect AP do?

A configured FlexConnect AP can switch client traffic onto the local wired network; some functions may continue locally during a controller-link outage.

What is the purpose of bridge or mesh AP modes?

Bridge or mesh APs use a wireless link to connect network segments or provide backhaul where cabling is unavailable.

What does an AP do in monitor mode?

A monitor-mode AP scans or monitors radio activity instead of serving ordinary client traffic.