Which two of the following statements represent a preferred wireless LWAPP implementation? (Choose two.)

A.
verify open ports for:
Layer 2 LWAPP on ethertype OxBBBB
Layer 3 LWAPP on UDP 12222 and UDP 12223

B.
use of Layer 3 LWAPP is preferred over Layer 2 LWAPP

C.
use of Layer 2 LWAPP is preferred over Layer 3 LWAPP

D.
verify open ports for:
Layer 2 LWAPP on ethertype OxBABA
Layer 3 LWAPP on UDP 12222 and TCP 12223

E.
verify open ports for:
Layer 2 LWAPP on ethertype OxABAB
Layer 3 LWAPP on TCP 12222 and TCP 12223

Explanation:
Explanation

LWAPP
Lightweight Access Point Protocol (LWAPP) is a draft Internet Engineering Task Force (IETF) standard for control messaging for setup, authentication, and operations between APs and WLAN controllers (WLC).

In the LWAPP RFC draft, LWAPP control messages can be transported at Layer 2 tunnels or Layer 3 tunnels. Layer 2 LWAPP tunnels were the first method developed in which the APs did not require an IP address. The disadvantage of Layer 2 LWAPP was that the WLC needed to be on every subnet on which the AP resides. Layer 2 LWAPP is a deprecated solution for Cisco. Layer 3 LWAPP is the preferred solution. In the configuration, Layer 2 or Layer 3 transport modes can be selected. When set Layer 3, the LWAPP uses IP addresses to communicate with the access points; these IP addresses are collected from a mandatory DHCP server. When set to Layer 2, the LWAPP uses proprietary code to communicate with the access points.

Note

Layer 2 LWAPP tunnels use EtherType code 0xBBBB. Layer 3 LWAPP uses UDP ports 12222 and
12223.

Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 5