This SY0-701 practice question tests your understanding of security architecture. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Guest tablets in a conference room use the same physical switches as employee devices. The security team wants guests to have internet access only, with no route to internal subnets. Which design best meets the goal?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Place guests on a separate VLAN and block internal access with ACLs.
Option B is correct because placing guest tablets on a separate VLAN segments traffic at Layer 2, and applying ACLs on the Layer 3 interface (SVI or router) blocks all routes to internal subnets while permitting internet access. This design ensures that even though guests share the same physical switches, their traffic is isolated from employee VLANs and cannot reach internal resources.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Keep guests on the same VLAN and rely on a separate Wi-Fi password.
Why it's wrong here
A different password does not stop routing between guest and internal devices on the same segment.
✓
Place guests on a separate VLAN and block internal access with ACLs.
Why this is correct
A separate VLAN creates logical segmentation, and ACLs enforce which networks the guests can reach.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use stronger WPA3 encryption on the wireless network and leave the network flat.
Why it's wrong here
Stronger encryption protects the wireless link, but it does not separate guest traffic from internal systems.
✗
Enable MAC address filtering on the switch and allow all ports to remain in the default network.
Why it's wrong here
MAC filtering is easy to bypass and does not provide the network isolation the team needs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse authentication/encryption methods (password, WPA3, MAC filtering) with network segmentation, failing to recognize that only Layer 2 VLAN separation combined with Layer 3 ACLs can enforce routing restrictions between subnets.
Detailed technical explanation
How to think about this question
VLAN segmentation works by assigning different VLAN IDs to guest and employee switchports, creating separate broadcast domains. ACLs applied to the VLAN interface (e.g., 'access-group 101 in' on the guest SVI) can explicitly deny traffic to internal RFC 1918 address ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16) while permitting HTTP/HTTPS outbound. In a real-world scenario, this is often combined with a guest captive portal and NAT to further isolate guest traffic.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SY0-701 question in full detail.
Security Architecture — This question tests Security Architecture — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Place guests on a separate VLAN and block internal access with ACLs. — Option B is correct because placing guest tablets on a separate VLAN segments traffic at Layer 2, and applying ACLs on the Layer 3 interface (SVI or router) blocks all routes to internal subnets while permitting internet access. This design ensures that even though guests share the same physical switches, their traffic is isolated from employee VLANs and cannot reach internal resources.
What should I do if I get this SY0-701 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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