Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
A stateless firewall sits between a DMZ subnet 10.10.10.0/24 and an internal subnet 10.10.20.0/24. Only the web server at 10.10.10.25 should be allowed to initiate TCP sessions to the app server at 10.10.20.20 on port 8443. All other DMZ-to-internal traffic must remain blocked. Which ACL entry is the best fit on the DMZ-facing interface?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
deny tcp 10.10.10.0/24 10.10.20.0/24 eq 8443 followed by permit ip any any
This would block the exact traffic that must be allowed, so it does not meet the business requirement. The trailing permit is also far too broad and would undermine segmentation by allowing other traffic through.
B
Best answer
permit tcp host 10.10.10.25 host 10.10.20.20 eq 8443 followed by deny ip any any
This rule is the least-privilege match for the stated requirement. It allows only the specific source host, destination host, and destination port needed for the application flow, while the explicit deny blocks all remaining DMZ-to-internal traffic on that interface. Because the firewall is stateless, narrowing the source and destination at the entry point is the safest way to prevent unintended exposure.
C
Distractor review
permit tcp host 10.10.20.20 host 10.10.10.25 eq 8443 followed by deny ip any any
This reverses the traffic direction. The app server in the internal subnet is not the initiating host in the requirement, so this rule would not permit the new session from the web server into the internal network.
D
Distractor review
permit ip 10.10.10.0/24 10.10.20.0/24 followed by deny ip any any
This permits every protocol and every port between the two subnets, which is far broader than needed. It increases lateral movement risk and ignores the requirement to restrict access to a single host and port.
Common exam trap
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Technical deep dive
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Related practice questions
Related SY0-701 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Security+ social engineering questions
Practise SY0-701 questions linked to Security+ social engineering questions.
Security+ cryptography practice questions
Practise SY0-701 questions linked to Security+ cryptography.
Security+ IAM questions
Practise SY0-701 questions linked to Security+ IAM questions.
Security+ risk management questions
Practise SY0-701 questions linked to Security+ risk management questions.
Security+ incident response questions
Practise SY0-701 questions linked to Security+ incident response questions.
Security+ malware questions
Practise SY0-701 questions linked to Security+ malware questions.
Security+ vulnerability management questions
Practise SY0-701 questions linked to Security+ vulnerability management questions.
Security+ security operations questions
Practise SY0-701 questions linked to Security+ security operations questions.
Security+ zero trust questions
Practise SY0-701 questions linked to Security+ zero trust questions.
Security+ authentication factors questions
Practise SY0-701 questions linked to Security+ authentication factors questions.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A laptop is suspected of being used in a malware incident. It is still powered on and connected to Wi-Fi. What should the responder do before shutting it down?
Question 2
An employee reports a ransomware note on a file server. The server is still powered on, shares are still being accessed, and management wants service restored as quickly as possible. What should the incident response team do first?
Question 3
An employee reports a ransomware note on a finance laptop. The laptop is still powered on, connected to Wi-Fi, and the user says they were just working in a spreadsheet. Management wants the fastest safe response that also preserves evidence. What should the responder do first?
Question 4
You are handed a company laptop suspected in an insider theft case. Legal says the evidence may be needed in court. Which action best preserves admissibility?
Question 5
A developer wants to reduce the risk of SQL injection in a new customer search form. Which two changes are the best mitigations? Select two.
Question 6
A branch office uses a flat LAN, and a compromise on one user workstation could spread quickly to finance systems. Management wants finance workstations isolated from general users, but finance staff still need access to a central finance application and network printer. What is the best design change?
FAQ
Questions learners often ask
What does this SY0-701 question test?
Authentication checks who the user is.
What is the correct answer to this question?
The correct answer is: permit tcp host 10.10.10.25 host 10.10.20.20 eq 8443 followed by deny ip any any — The correct ACL must allow only one source host, one destination host, and one destination port, because the firewall is stateless and the requirement is tightly scoped. Placing the rule on the DMZ-facing interface ensures unauthorized DMZ traffic is stopped before it can enter the internal trust zone. That approach supports segmentation and least privilege while still allowing the application connection the business needs. Why others are wrong: Option A blocks the needed session and then opens the door to everything else. Option C reverses the flow and would not help a client-initiated connection from the DMZ. Option D is overly permissive because it allows all traffic between the subnets, not just the approved application path.
What should I do if I get this SY0-701 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
Discussion
Loading comments…
Sign in to join the discussion.