HCIA-WLAN study plan

Explain how 802.11a/b/g/n/ac/ax differ in frequency band, channel width, modulation, and maximum theoretical rate, and state which band and width each standard can use.

Map the 2.4 GHz and 5 GHz channel plans, identifying which 2.4 GHz channels are non-overlapping and why 5 GHz channels are usually preferred for capacity.

Describe the role of SSID, BSSID, BSS, ESS, and DS, and distinguish infrastructure mode from ad hoc and mesh topologies.

Trace the 802.11 frame exchange for association and for a data frame, naming management, control, and data frame types and the purpose of the three MAC address fields.

Explain CSMA/CA, DIFS/SIFS/AIFS timing, backoff, and RTS/CTS, and describe how hidden-node and exposed-node problems affect throughput.

Describe 802.11 security evolution from WEP through WPA/WPA2 to WPA3, stating what each fixes and which EAP methods are common in enterprise deployments.

Explain 802.1X authentication flow with a RADIUS server, including supplicant, authenticator, and authentication server roles.

Summarize CAPWAP tunnel behavior (control and data channels, DTLS, data encapsulation modes) and how it differs from a fat AP architecture.

Define roaming types (intra-AC, inter-AC, layer 2 vs layer 3) and state what a client and infrastructure each do during a roam.

Classify Huawei WLAN product families by role (access controller, access point, and the AP types for indoor, outdoor, and high-density scenarios) and state typical use cases for each.

Identify the physical interfaces, power options (PoE, DC), and mounting considerations of a representative indoor and outdoor AP.

Explain PoE standards and power budgeting, and calculate whether a given switch port budget can power a stated number of APs.

Describe how an AP boots and discovers an AC (DHCP option, DNS, broadcast, static), and what happens if discovery fails.

Distinguish fit AP, fat AP, and cloud-managed operation and state which product lines and licenses each requires.

Describe the AC initial login, licensing activation, and software upgrade workflow, and list the order in which these should be done on a new deployment.

Configure a basic fit-AP deployment: AC source interface, AP authorization, AP group, and regulatory domain.

Configure WLAN essentials: security profile, SSID profile, traffic profile, and VAP profile, and explain how profiles bind to an AP group.

Configure DHCP for AP and client address pools and verify an AP comes online and a client associates.

Configure WPA2-Enterprise with 802.1X on the AC and a RADIUS server, and verify a client authenticates successfully.

Configure roaming-related parameters (AC/AP group boundaries, layer 3 roaming, and band steering) and explain the effect of each on client behavior.

Configure and compare tunnel forwarding versus local forwarding, and state which traffic path each produces.

Design a small coverage plan: given a floor area and user density, estimate AP count from capacity and coverage and place APs on a sketch.

Configure guest network isolation and rate limiting, and verify isolation with a client-to-client test.

Use AC and AP diagnostic commands to read AP status, client status, and radio statistics, and interpret what each counter means.

Capture and analyze a wireless frame trace to identify association failure causes such as authentication timeout, DHCP failure, or wrong security profile.

Diagnose common faults: AP offline, AP flapping, client unable to obtain an IP address, low throughput, and frequent roaming, stating a likely root cause and first check for each.

Explain how to read signal strength, SNR, noise floor, and channel utilization and set thresholds for acceptable versus poor coverage.

Describe the alarm and log workflow on the AC and how to export logs for escalation.

Perform a site survey workflow: pre-deployment requirements gathering, predictive placement, on-site verification, and post-deployment validation, and state what data each stage produces.

Execute spectrum analysis and channel planning to reduce co-channel interference in a dense deployment, and justify channel and width choices.

Revisit weak areas from earlier weeks by re-answering missed practice questions and correcting your notes.

Explain RF concepts that drive troubleshooting: free-space path loss, Fresnel zone, multipath, MIMO spatial streams, and antenna gain and patterns.

Take two full timed practice exams and score each by domain to find remaining weak areas.

Review every missed question, write the correct reasoning, and re-test those items after 48 hours.

Recite from memory the key facts: standard-to-band-and-rate mapping, PoE classes, CAPWAP ports, 802.1X roles, and the profile binding chain.

Walk through three end-to-end scenarios (new deployment, roaming issue, client connectivity failure) out loud as if explaining to a colleague.