Free 300-425 Practice Test Questions 2026

Explanation:

The Cisco AireOS WLCs (running version 6.0.4539:44024) originally supported OEAP (OfficeExtend Access Points) with Base or Advanced licenses. However, with newer controller versions (particularly AireOS 8.0+ and later Cisco Catalyst 9800 controllers), OEAP functionality is only supported with a Premium license.

Premium License includes:

OEAP support (required for home/remote worker APs).

Advanced features like application visibility, policy enforcement, and enhanced security.

Why Other Options Are Incorrect:

A) Base – Does not support OEAP in newer controller versions.

C) WPlus – This was a legacy license type (pre-8.0) and is no longer applicable.

D) Advanced – Previously supported OEAP in older AireOS versions, but Premium is now required for OEAP in newer releases.

Reference:

Cisco Wireless Licensing Guide (for AireOS & Catalyst 9800) states that Premium licensing is mandatory for OEAP in modern deployments.

Cisco OEAP 600/700 Series Deployment Guide confirms the licensing requirement for newer controller software.

Explanation:

For Cisco HyperLocation, which provides high-accuracy location tracking (within 1–3 meters), Cisco recommends:

30% cell overlap between adjacent access points (APs).

This ensures seamless AeroScout RFID tag tracking and CMX analytics while maintaining optimal RF coverage.

Why Other Options Are Incorrect:

A)20% – Too low; may cause gaps in location tracking and poor roaming.

C)40% – Excessive overlap can lead to co-channel interference (CCI) and degraded performance.

D)50% – Unnecessary for HyperLocation and could negatively impact network efficiency.

Reference:

Cisco HyperLocation Deployment Guide (officially recommends 30% overlap for best results).

Cisco CMX Design Guide (supports this RF planning requirement for high-accuracy indoor positioning).

Explanation:

To configure High Availability (HA) with Client Stateful Switchover (SSO) between two Cisco Catalyst 9800 (IOS XE) Wireless LAN Controllers (WLCs), the following requirements must be met:

D) Each WLC must have a unique redundancy management IP address.

The redundancy management IP is used for communication between the active and standby controllers.

If both had the same IP, it would cause a conflict, preventing proper HA synchronization.

E) The controllers must run the same operating system version.

HA pairs must run identical software versions to ensure compatibility and seamless failover.

Mismatched versions can lead to synchronization failures or unexpected behavior.

Why Other Options Are Incorrect:

A) The controllers must have the same number of licenses.

While licensing should be consistent for operational purposes, it is not a strict HA requirement.

B) Both WLCs must have the same redundancy management IP address.

Incorrect—each WLC in an HA pair must have a unique redundancy management IP.

C)Both WLCs must have the same service port IP address.

False—service port IPs should be different to avoid conflicts.

Reference:

Cisco Catalyst 9800 Series WLC High Availability Configuration Guide

Requires same software version and unique redundancy IPs for HA/SSO.

Cisco Wireless LAN Controller HA Deployment Best Practices

Explanation:

The issue arises due to Transmit Power Control (TPC) in the 2.4 GHz band, which is part of Cisco’s Radio Resource Management (RRM). Here’s why:

Legacy 802.11b/g devices have lower sensitivity and require a stronger signal to maintain connectivity.

TPC dynamically adjusts AP transmit power to optimize coverage and reduce interference.

If TPC reduces power too aggressively, legacy clients (which lack modern power-saving mechanisms) may lose connectivity because their receivers cannot detect weaker signals.

-67 dBm requirement (5 GHz) does not guarantee sufficient signal strength for 2.4 GHz legacy devices when TPC lowers power.

Why Other Options Are Incorrect:

A) Excessive co-channel interference in the 2.4 GHz band – While possible, the question points to TPC as the root cause, not just interference.

B) Excessive overlapping channels in the 2.4 GHz band – Overlapping channels cause interference, but the issue described is connectivity loss, not just performance degradation.

C) TPC drastically increases Tx power in the 2.4 GHz band – TPC reduces (not increases) power to optimize coverage, which is the problem here.

Reference:

Cisco Radio Resource Management (RRM) Best Practices Guide – Explains how TPC can impact legacy clients.

Cisco Wireless LAN Design for High-Density Environments – Recommends disabling TPC for 2.4 GHz in legacy-heavy deployments.

Solution:

Disable TPC for 2.4 GHz (or set a higher minimum Tx power) to ensure legacy devices remain connected.

Use band steering to push capable clients to 5 GHz, reducing 2.4 GHz congestion.

Explanation:

LAG (Link Aggregation Group)-based redundancy is preferred over port-based redundancy for the following reasons:

B) All interface traffic passes as long as one port is up.

LAG provides link redundancy—if one physical link fails, traffic continues over the remaining links.

In port-based redundancy, a single link failure could disrupt traffic until failover completes.

D) Interface connection to two separate nonstacked switches is available.

LAG supports Multi-Chassis Link Aggregation (MLAG/MCLAG), allowing connections to two different switches for true redundancy.

Port-based redundancy typically requires stacked switches or a single switch.

E) Full bandwidth of all links is available.

LAG load-balances traffic across all active links, utilizing the full aggregated bandwidth.

Port-based redundancy keeps a backup port idle until failover, wasting bandwidth.

Why Other Options Are Incorrect:

A) Packets are always sent out on the same port they are received on.

False—LAG uses load balancing (e.g., via MAC or IP hash), so traffic may exit different ports.

C) The same port has multiple untagged dynamic interfaces.

Irrelevant—This describes VLAN/interface configuration, not a LAG benefit.

F) Ports are grouped into multiple LAGs.

Incorrect—A WLC typically uses a single LAG (not multiple LAGs) for redundancy.

Reference:

Cisco WLC LAG Deployment Guide – Recommends LAG for redundancy and bandwidth efficiency.

Cisco High Availability Wireless LAN Controller Design – Compares LAG vs. port-based redundancy.

Explanation:

In a foreign/export-anchor WLAN design, guest traffic is tunneled from the foreign WLC (where clients connect) to the anchor WLC (where policies are enforced). The system uses anchor priorities to prefer local anchors (e.g., US clients should anchor to the US WLC).

Why US clients are anchoring to Europe:
If the US anchor WLC failed and later recovered, guest sessions may have failed over to European anchors during the outage.

After recovery, some sessions may remain anchored in Europe until they disconnect or reauthenticate.

This is expected behavior in mobility anchor failover scenarios.

Why Other Options Are Incorrect:

A) The foreign WLC failed and recovered.
If the foreign WLC failed, clients would disconnect entirely, not shift anchors.

C) The US anchor WLC is anchored to itself with a priority value of zero.
A priority of zero means "do not use this anchor", but this would not explain why sessions shifted to Europe (they would just fail).

D) The anchor WLC is in the same mobility group.
Being in the same mobility group is required for anchoring, but it doesn’t explain why sessions moved to Europe.

Solution:
Force guest clients to reauthenticate to re-anchor them to the preferred US WLC.

Check anchor WLC health (CPU, memory, HA status) to prevent future failovers.

Reference:
Cisco Wireless LAN Controller Mobility Anchor Configuration Guide

Cisco Guest Access Deployment Best Practices

Explanation:

To achieve high availability (HA) with client Stateful Switchover (SSO), the following requirements must be met:

A) Redundant WLC – Mandatory for HA.

A secondary WLC is required to take over if the primary fails.

Ensures uninterrupted service during failover.

B) Controller high availability pair with one of the WLCs having a valid AP count license – Critical for SSO functionality.

In an HA pair, only one WLC needs an AP license (the standby syncs but does not require a separate license).

Ensures seamless failover without AP disconnections.

Why Other Options Are Incorrect:

C) 10 sec RTT – Irrelevant for HA design.

RTT (Round-Trip Time) matters for latency-sensitive apps, but not for HA configuration.

D) Back-to-back direct connection between WLCs – Not required.

WLCs in an HA pair can communicate over a network link (no need for a direct physical connection).

E) WLC 7.5 code or more recent – Outdated.

Modern deployments use AireOS 8.x+ or Catalyst 9800 IOS XE, not 7.5.

Reference:

Cisco High Availability for Wireless LAN Controllers Deployment Guide

Requires redundant WLCs and HA licensing.

Cisco Client Stateful Switchover (SSO) Configuration

Confirms only one AP license is needed in an HA pair.

Explanation:

When segmenting a corporate WLAN into smaller subnets based on location, Interface Groups are the correct solution. Here’s why:

Interface Groups allow you to:

Map multiple dynamic interfaces (VLANs) to a single WLAN.

Assign clients to different subnets based on AP location, AP group, or other criteria.

This is ideal for location-based subnetting (e.g., different floors or buildings getting different IP ranges).

Why Other Options Are Incorrect:

A) WLC port groups – Used for physical port redundancy (LAG), not subnet assignment.

B) RF groups – Used for Radio Frequency (RF) coordination between controllers, not VLAN/subnet mapping.

C) AP groups – Used for grouping APs for configuration purposes (e.g., different SSIDs or RF settings), but not for subnet assignment directly.

Reference:

Cisco Wireless LAN Controller Configuration Guide (Interface Groups section).

Cisco Enterprise Mobility Design Guide (Best Practices for VLAN Segmentation).

Explanation:

To support seamless roaming between access points, the engineer must implement 802.11r (Fast BSS Transition - FT). Here’s why:

802.11r is specifically designed to reduce handoff time during roaming by:

Pre-authenticating clients before they roam.

Caching security keys to skip full 802.1X re-authentication.

Enabling sub-50ms roaming, critical for voice/video over Wi-Fi (VoWiFi) and real-time applications.

Why Other Options Are Incorrect:

A) 802.11i – Focuses on security (WPA2 encryption), not roaming.

B) 802.11ac – A PHY-layer standard for high throughput (5 GHz), unrelated to roaming.

D) 802.11e – Defines QoS (WMM) for prioritization, but does not improve roaming.

Reference:

IEEE 802.11r-2008 Standard (Fast BSS Transition).

Cisco Fast Transition Roaming Deployment Guide (Best Practices for Voice/Video over Wi-Fi).

Explanation:

When performing a Layer 1 survey using MetaGeek Chanalyzer (or similar tools) on the current operating channel, the Cisco CleanAir AP must be in Monitor Mode. Here’s why:

Monitor Mode allows the AP to:

Scan and analyze RF interference (including non-Wi-Fi sources like microwaves, Bluetooth, etc.).

Report spectrum data to the WLC for CleanAir diagnostics.

Passively listen without transmitting data, making it ideal for RF surveys.

Why Other Options Are Incorrect:

A) Local Mode – The AP serves clients and cannot dedicate full resources to interference detection

B) Sniffer Mode – Used for packet captures, not spectrum analysis (requires Wireshark, not Chanalyzer).

D) SE-Connect – A MetaGeek-specific mode for Wi-Spy adapters, not a Cisco AP operating mode.

Reference:

Cisco CleanAir Technology Guide (Monitor Mode for RF spectrum analysis).

MetaGeek Chanalyzer Documentation (Interference detection with Cisco APs).

Explanation:

When High Availability (HA) with Stateful Switchover (SSO) is configured on Cisco 5508 WLCs, the standby unit is not accessible via normal management interfaces (like the virtual IP or primary WLC's management IP). Instead, you must use:

A) Console connection – Direct physical access to the standby WLC’s console port.

This is the most reliable method since it doesn’t depend on network connectivity.

C) SSH to the service port interface – The service port (a dedicated out-of-band management port) remains active on the standby unit.

Configured with a separate IP (not tied to HA), allowing direct SSH access.

Why Other Options Are Incorrect:

B) SSH to the redundancy management interface of the primary WLC – The redundancy IP is for HA communication, not standby WLC management.

D) SSH to the virtual interface of the secondary WLC – The standby WLC does not respond to the virtual IP (only the active unit does).

E) SSH to the management interface of the primary WLC – This accesses the active unit, not the standby.

Reference:

Cisco 5508 WLC HA Configuration Guide (Standby Unit Access Methods).

Cisco Wireless LAN Controller Command Reference (Service Port Usage).

Explanation:

For an enterprise using Cisco AireOS controllers with Wi-Fi 6 APs and Apple OS devices, Aggregated Probe Response Optimization is the best option to optimize roaming. Here’s why:

Apple devices (iOS/macOS) aggressively probe for networks, which can cause excessive probe requests and slow roaming.

Aggregated Probe Response Optimization reduces unnecessary probe responses from APs, improving:

Roaming speed (fewer probe exchanges).

Battery life (less radio activity).

Airtime efficiency (less broadcast/multicast overhead).

Why Other Options Are Incorrect:

B) Fast SSID Changing – Not a standard Cisco feature; Apple devices handle SSID selection internally.

C) Load Balancing Window – Balances clients across APs but does not directly improve roaming.

D) Client Timers – Adjusts timeout values but does not address Apple’s probing behavior.

Reference:

Cisco AireOS Configuration Guide (Optimizations for Apple Devices).

Apple Enterprise Wi-Fi Deployment Guide (Best Practices for Cisco Controllers).