CCNA Switching and Network Access Practice Question
A client can join a corporate SSID and authenticate successfully, but it consistently loses connectivity when moving between floors. Which area is most strongly suggested for deeper investigation?
⚠ Common exam trap
A common exam trap is assuming that connectivity loss during movement is caused by SSID visibility or initial authentication failure. Since the client can join and authenticate successfully, the problem is not with the SSID broadcast or basic network access. Another tempting mistake is to consider unrelated network configurations such as BGP autonomous system numbers or ACL wildcard masks, which do not affect wireless roaming. The key is to focus on roaming and RF behavior between AP coverage areas, as these directly impact client mobility and session continuity in a wireless environment.
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
✓
Roaming and RF behavior between AP coverage areas
The strongest area for deeper investigation is wireless mobility and RF behavior between the AP coverage areas involved. In practical terms, the client can already authenticate and use the WLAN initially, so the issue is more likely tied to movement, signal transition, channel behavior, or roaming-related operation rather than basic SSID existence or initial authentication alone. This is a mobility-troubleshooting question, not a simple association problem.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Roaming and RF behavior between AP coverage areas
Why this is correct
The key clue is that the client joins and authenticates successfully at the start, but the failure occurs during movement—this is classic roaming behavior. In 802.11 wireless, roaming requires the client to perform reassociation with a new AP, and issues like coverage gaps, channel overlap, neighbor AP signal strength, or lack of 802.11r fast transition can cause traffic loss. Because the problem manifests only after moving between AP coverage areas, roaming and RF behavior are the correct focus.
- ✗
Whether the SSID is visible at all
Why it's wrong here
SSID visibility only affects whether the client can discover the network during a scan; once the client has already associated and authenticated successfully, the SSID is demonstrably being broadcast and received. The problem statement explicitly states the client can join, so invisibility is ruled out as the cause. Roaming failures occur after association, when the client moves between AP coverage areas, not during initial discovery.
When this WOULD be correct
In a different scenario where a user reports being unable to connect to a corporate SSID at all, the question could ask about potential causes for this issue. In that case, investigating whether the SSID is visible would be crucial to determine if the client can see and attempt to connect.
- ✗
Whether the host has a BGP autonomous system number
Why it's wrong here
BGP is an exterior gateway protocol used to exchange routing information between autonomous systems on the Internet, and it has no bearing on wireless client connectivity, 802.11 authentication, or roaming behavior. A host does not need a BGP AS number to join an SSID, and BGP configuration would not selectively break connectivity during movement. This is a distractor that conflates enterprise network routing protocols with client-level Wi-Fi roaming.
When this WOULD be correct
In a question focused on routing protocols and their configuration in a multi-site corporate environment, a scenario might ask about the importance of BGP in ensuring optimal routing paths. Here, understanding the role of autonomous system numbers would be crucial for correct routing decisions.
- ✗
Whether the switch uses a smaller wildcard mask
Why it's wrong here
ACL wildcard masks determine which bits of an IP address are matched, and a smaller wildcard mask actually means a more specific match, not a broader block. If a switch ACL were blocking the client, the initial association and authentication would fail consistently, not just during roaming. The symptom of losing connectivity after moving between APs points to RF transition issues, not to ACL wildcard mask logic.
When this WOULD be correct
If the exam question were focused on routing issues within a network where a switch's configuration impacts the routing of traffic, then investigating the use of a smaller wildcard mask could be relevant. For example, if the question involved troubleshooting routing issues in a multi-VLAN environment, this option could be correct.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
✓Roaming and RF behavior between AP coverage areasCorrect answer▾
Why this is correct
The key clue is that the client joins and authenticates successfully at the start, but the failure occurs during movement—this is classic roaming behavior. In 802.11 wireless, roaming requires the client to perform reassociation with a new AP, and issues like coverage gaps, channel overlap, neighbor AP signal strength, or lack of 802.11r fast transition can cause traffic loss. Because the problem manifests only after moving between AP coverage areas, roaming and RF behavior are the correct focus.
✗Whether the SSID is visible at allWrong answer — click to see why▾
Why this is wrong here
The client can already join the SSID and authenticate successfully, so SSID visibility is not the issue. The problem occurs only during movement, not during initial connection.
★ When this WOULD be the correct answer
In a different scenario where a user reports being unable to connect to a corporate SSID at all, the question could ask about potential causes for this issue. In that case, investigating whether the SSID is visible would be crucial to determine if the client can see and attempt to connect.
Why candidates choose this
Students might think that if the client loses connectivity, the SSID might be hidden or not broadcasting on other floors, but the client's successful initial join indicates the SSID is visible at least in the starting area.
✗Whether the host has a BGP autonomous system numberWrong answer — click to see why▾
Why this is wrong here
BGP is a routing protocol used between autonomous systems in wide area networks, not relevant to wireless client connectivity or roaming within a single enterprise network. Hosts typically do not run BGP.
★ When this WOULD be the correct answer
In a question focused on routing protocols and their configuration in a multi-site corporate environment, a scenario might ask about the importance of BGP in ensuring optimal routing paths. Here, understanding the role of autonomous system numbers would be crucial for correct routing decisions.
Why candidates choose this
A test-taker might confuse BGP with other protocols or think that any connectivity issue could be related to routing, but BGP is not involved in wireless client roaming.
✗Whether the switch uses a smaller wildcard maskWrong answer — click to see why▾
Why this is wrong here
Wildcard masks are used in access control lists (ACLs) to match IP addresses, not directly related to wireless roaming issues. The problem is about physical movement between floors, not ACL configuration.
★ When this WOULD be the correct answer
If the exam question were focused on routing issues within a network where a switch's configuration impacts the routing of traffic, then investigating the use of a smaller wildcard mask could be relevant. For example, if the question involved troubleshooting routing issues in a multi-VLAN environment, this option could be correct.
Why candidates choose this
Students might associate wildcard masks with network troubleshooting or think that a misconfigured ACL could cause connectivity loss, but the specific symptom of losing connectivity when moving floors points to RF/roaming issues, not ACLs.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Visual reference
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
Go deeper
Related to this question
Learn chapter
Interpreting Packet Capture Output for Layer 2/3 Troubleshooting
Key term
CAN
A CAN (Controller Area Network) is a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other without a host computer.
Key term
SSID
An SSID is the public name of a Wi-Fi network that devices use to identify and connect to it.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-301 practice question is part of Courseiva's free Cisco 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 200-301 exam.