hardMultiple ChoiceObjective-mapped
220-1201 Practice Question: A technician is deploying a wireless network in a…
A technician is deploying a wireless network in a large warehouse with metal shelving. The goal is to provide seamless roaming for handheld scanners. Which technology should the technician implement to ensure clients quickly switch between access points without dropping connections?
⚠ Common exam trap
The 220-1201 exam often tests the distinction between coverage-enhancing features (beamforming, MIMO, mesh) and roaming-optimization protocols (802.11r, 802.11k, 802.11v), leading candidates to confuse signal improvement with handoff speed.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable 802.11r (Fast Roaming) on the access points
802.11r, also known as Fast BSS Transition or Fast Roaming, enables clients to authenticate and reassociate with a new access point using a cached PMK (Pairwise Master Key) from the initial full authentication, reducing the handshake process from four EAP frames to two. In a warehouse with metal shelving causing signal attenuation, this minimizes the time clients spend scanning and reconnecting, ensuring seamless roaming for handheld scanners without dropping connections.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enable 802.11r (Fast Roaming) on the access points
Why this is correct
802.11r, also known as Fast BSS Transition, significantly reduces the time a wireless client takes to re-authenticate when moving between access points within the same network. It achieves this by allowing the client and the new AP to pre-negotiate security keys or by caching existing keys, thus minimizing the authentication handshake duration. This seamless handoff is crucial for applications sensitive to latency, like VoIP or video streaming, ensuring an uninterrupted user experience.
- ✗
Use a wireless mesh topology
Why it's wrong here
A wireless mesh topology primarily focuses on extending network coverage and providing redundancy by allowing APs to communicate wirelessly with each other, rather than requiring a wired backhaul for every node. While it ensures connectivity across a wider area, it does not inherently optimize the client's roaming *process* or the speed of handoff between different APs. Clients still undergo standard authentication procedures when transitioning, which 802.11r specifically addresses.
- ✗
Configure beamforming on each access point
Why it's wrong here
Beamforming is a technique where an access point intelligently directs its wireless signal towards a specific client device, rather than broadcasting uniformly in all directions. This focused transmission improves the signal-to-noise ratio, enhancing data rates, range, and overall connection stability for that particular client. However, beamforming does not accelerate the authentication or re-association process when a client decides to switch its connection from one AP to another.
- ✗
Deploy MIMO antennas
Why it's wrong here
Multiple-Input Multiple-Output (MIMO) technology utilizes multiple antennas on both the transmitter and receiver to improve wireless communication performance. It enhances data throughput and link reliability by enabling spatial multiplexing, sending multiple unique data streams simultaneously, or through diversity techniques. While MIMO significantly boosts the speed and efficiency of a connection *to a single access point*, it does not directly influence the speed or latency involved in a client *transitioning* its connection between different APs.
Quick reference
AAA Protocol Comparison
| Protocol | Port(s) | Encryption | Transport | Primary Use |
|---|---|---|---|---|
| RADIUS | 1812 / 1813 | Password only | UDP | Network access control |
| TACACS+ | 49 | Full packet | TCP | Device administration |
| Diameter | 3868 | Full session | TCP / SCTP | Carrier / mobile networks |
| 802.1X | — | EAP-based | Layer 2 | Port-based access control |
TACACS+ encrypts the entire packet; RADIUS only encrypts the password field — a key exam distinction.
Go deeper
Related to this question
Learn chapter
Network Configuration: IP, DNS, DHCP
Key term
Access Point
An access point is a device that creates a wireless local area network, usually by connecting to a wired network and broadcasting a Wi-Fi signal for computers, phones, and tablets to join.
Key term
Switch
A switch is a networking device that connects devices on a local area network and uses MAC addresses to forward data only to the intended recipient.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 220-1201 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 220-1201 exam.