300-120 WLSI: Implementing Cisco Wireless Advanced Solutions

Cisco workgroup-bridge behavior uses 64 frame retransmissions by default. If the parent AP still does not acknowledge the frame after that limit, the station treats the parent as no longer valid and initiates roaming; with drop behavior configured, it stops retrying the frame. 32 is a possible lower, faster-roaming configuration, not the default retry limit in this context.

Cisco DNA Center’s Global Network Health view summarizes the health of managed network devices and breaks it down by device role, such as routers, core, distribution, access, wireless controllers, and access points. Cisco documents this view under Assurance > Health > Network > Global. Cisco Prime Infrastructure Health is a dashboard from a different management platform, while a Users Health view would report client health rather than device-role health.

CSMA/CA is the IEEE 802.11 wireless-medium access method. Wireless stations use carrier sensing and collision-avoidance measures, such as waiting and randomized backoff, because they cannot reliably detect collisions while transmitting as wired Ethernet devices can. The similar expansion using “Media Access” is not the standardized meaning of CSMA; the M stands for Multiple.

APs with internal antennas are generally designed to provide broad, near-omnidirectional coverage around the device, making them appropriate where a relatively wide coverage area is needed. Coverage primarily toward one side, or a patch-antenna pattern, requires directional antennas that concentrate RF energy in a selected direction rather than the broad pattern associated with typical integrated indoor AP antennas.

A primary AP can serve image downloads to at most three same-model subordinate APs at one time because it supports a maximum of three concurrent TFTP connections for this process. Any higher concurrent count is therefore not permitted; remaining subordinate APs wait and retry after a download slot becomes available.