200-301 Question #1429: Real Exam Question with Answer & Explanation

The correct answer is A: 802.3ad. When a Cisco Wireless LAN Controller (WLC) has multiple distribution system ports configured with a single IP address, the 802.3ad standard is required to bundle these ports.

Submitted by femi9· Mar 5, 2026<must be one of the domains listed above>

Question

Which standard is required when more than one distribution system port and only one IP address are configured for a Cisco WLC?

Options

A802.3ad
B802.1q
C802.1d
D802.1af

Explanation

When a Cisco Wireless LAN Controller (WLC) has multiple distribution system ports configured with a single IP address, the 802.3ad standard is required to bundle these ports.

Common mistakes.

B. 802.1q is a standard for VLAN tagging and does not address port aggregation.
C. 802.1d is the Spanning Tree Protocol (STP) standard, which prevents network loops but is not used for port bundling.
D. 802.1af is not a commonly recognized networking standard for port aggregation in this context.

Concept tested. WLC port aggregation (LACP/802.3ad)

Reference. https://www.cisco.com/c/en/us/td/docs/wireless/controller/7-0/configuration/guide/c70wlc/c70wlc_ports.html

Topics

#WLC port aggregation#802.3ad#Link Aggregation

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