Exam 350-401 topic 1 question 145 discussion

I think it's A - Primed WLC Locally stored controller IPv4 or IPv6 address discovery—If the access point was previously associated to a controller, the IPv4 or IPv6 addresses of the primary, secondary, and tertiary controllers are stored in the access point’s nonvolatile memory. This process of storing controller IPv4 or IPv6 addresses on an access point for later deployment is called priming the access point. https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-6/config-guide/b_cg86/ap_connectivity_to_cisco_wlc.html

The order of selecting a WLC according to the exam guide: 1: If the AP has previously joined a controller and has been configured or "primed" with a primary, secondary, and tertiary controller, it tries to join those controllers in succession. 2. If the AP does not know of any candidate controller, it tries to discover one (which includes the use of option 43). Priming an AP directly overrules option 43, so A should be the correct answer.

A is correct even if option 43 is set up to direct the AP to a specific WLC, the primed configuration takes precedence, and the AP will join the WLC it has been primed for.

Intra-Controller Roaming: client roaming across access points managed by the same controller. Inter-Controller Roaming: client roaming across access points in managed by different controllers in the same mobility group and on the same subnet. Inter-Subnet Roaming: client roaming across access points managed by different controllers in the same mobility group on different subnets.

A is correct

Ref: How to configure the Lightweight AP in order to join the respective WLAN Controller - Cisco Community Post by TCC_2 “… Overview of the Wireless LAN Controller (WLC) Discovery and Join Process … In addition to these methods, the LAP does automatically look on the local subnet for controllers with a 255.255.255.255 local broadcast. Also, the LAP remembers the management IP address of any controller it joins across reboots. Therefore, if you put the LAP first on the local subnet of the management interface, it will find the controller's management interface and remember the address. This is called priming. This does not help find the controller if you replace a LAP later on. Therefore, Cisco recommends using the DHCP option 43 or DNS methods. …” A. The AP is joining a primed WLC Correct answer. B. The APs broadcast traffic is unable to reach the WLC through Layer 2 Wrong answer. C. The AP multicast traffic is unable to reach the WLC through Layer 3 Wrong answer. D. The WLC is running a different software version Wrong answer.

A is the correct answer. Primed.

Only if is a primed wlc the controller will have this behavior.

It should be A

Even if you don't know the right anser you can rule out b, c,d Why should the AP user boadcast or multicast to communicat with the WLC, when he gets the IP Adresse in option 43. Communication between WLC and AP is always unicast! D is Wrong becaus if the Software does not match the AP always loads the correct version from the WLC. So only Anser A ist left

The correct answer is: A. The AP is joining a primed WLC

Only if a Prime WLC exists, we see this behaviour A is correct

Option 43 talks about a LIST of WLCs NOT a single one. It's A.

Should be A the correct answer..

its A, the AP is already primed to another WLC

Correct Answer: A

A is correct. AP try to join primed controller first. If it has no primed controller, goes option 43.