- A
permit ip any any deny ip 10.10.0.0 0.0.255.255 192.168.1.0 0.0.0.255 permit tcp host 10.10.1.100 192.168.1.0 0.0.0.255 eq 22
Why wrong: Permits all before deny, making deny useless.
- B
permit tcp host 10.10.1.100 192.168.1.0 0.0.0.255 eq 22 permit ip any any deny ip 10.10.0.0 0.0.255.255 192.168.1.0 0.0.0.255
Why wrong: Permits all traffic after SSH, opening full access.
- C
permit tcp host 10.10.1.100 192.168.1.0 0.0.0.255 eq 22 deny ip 10.10.0.0 0.0.255.255 192.168.1.0 0.0.0.255 permit ip any any
Correct order: permit specific, deny source, permit rest.
- D
deny ip 10.10.0.0 0.0.255.255 192.168.1.0 0.0.0.255 permit tcp host 10.10.1.100 192.168.1.0 0.0.0.255 eq 22 permit ip any any
Why wrong: Denies management traffic before permitting jump host, blocking SSH.
Quick Answer
The answer is Option C, which places the permit statement for SSH from the jump host before the deny statement for the management subnet. This ordering is correct because ACLs are processed top-down with a first-match logic; the explicit permit for the exception must appear before the broader deny rule to ensure the jump host’s traffic is allowed through. On the Cisco DCCOR / CCNP Data Center Core 350-601 exam, this scenario tests your understanding of ACL order of operations, specifically the principle that a permit exception must precede a deny when using overlapping source ranges. A common trap is placing the deny first, which would block the jump host along with the rest of the management network, or forgetting the final permit ip any any, which would drop all other traffic on the management interface. Remember the memory tip: “Permit the exception before the deny, or the exception will die.”
350-601 Security Practice Question
This 350-601 practice question tests your understanding of security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
A data center engineer configures an ACL on a Nexus 9000 switch to block all traffic from the management network (10.10.0.0/16) to the production servers (192.168.1.0/24) except for SSH access from a specific jump host (10.10.1.100). The ACL is applied inbound on the management interface. Which ACL entry is correctly ordered to achieve this requirement?
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
permit tcp host 10.10.1.100 192.168.1.0 0.0.0.255 eq 22 deny ip 10.10.0.0 0.0.255.255 192.168.1.0 0.0.0.255 permit ip any any
Option C is correct because ACLs are processed top-down, and the first match wins. The explicit permit for SSH from the jump host (10.10.1.100) must come before the deny for the entire 10.10.0.0/16 range to ensure the exception is honored. The final permit ip any any allows all other non-management traffic, which is necessary to avoid dropping legitimate traffic on the management interface.
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.
- ✗
permit ip any any deny ip 10.10.0.0 0.0.255.255 192.168.1.0 0.0.0.255 permit tcp host 10.10.1.100 192.168.1.0 0.0.0.255 eq 22
Why it's wrong here
Permits all before deny, making deny useless.
- ✗
permit tcp host 10.10.1.100 192.168.1.0 0.0.0.255 eq 22 permit ip any any deny ip 10.10.0.0 0.0.255.255 192.168.1.0 0.0.0.255
Why it's wrong here
Permits all traffic after SSH, opening full access.
- ✓
permit tcp host 10.10.1.100 192.168.1.0 0.0.0.255 eq 22 deny ip 10.10.0.0 0.0.255.255 192.168.1.0 0.0.0.255 permit ip any any
Why this is correct
Correct order: permit specific, deny source, permit rest.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
deny ip 10.10.0.0 0.0.255.255 192.168.1.0 0.0.0.255 permit tcp host 10.10.1.100 192.168.1.0 0.0.0.255 eq 22 permit ip any any
Why it's wrong here
Denies management traffic before permitting jump host, blocking SSH.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often place the deny rule first, forgetting that ACLs are first-match and that the exception for the jump host must be evaluated before the broader deny rule.
Detailed technical explanation
How to think about this question
Cisco Nexus 9000 switches use TCAM-based ACL processing where entries are evaluated in order of sequence number; a common best practice is to place more specific permits before broader denies. The wildcard mask 0.0.255.255 for 10.10.0.0 matches all hosts in the 10.10.0.0/16 range, and the explicit host entry for 10.10.1.100 must precede it to create an exception. In real-world deployments, forgetting the final 'permit ip any any' can cause unintended traffic drops, especially on management interfaces that may carry control-plane 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 security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
What to study next
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FAQ
Questions learners often ask
What does this 350-601 question test?
Security — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: permit tcp host 10.10.1.100 192.168.1.0 0.0.0.255 eq 22 deny ip 10.10.0.0 0.0.255.255 192.168.1.0 0.0.0.255 permit ip any any — Option C is correct because ACLs are processed top-down, and the first match wins. The explicit permit for SSH from the jump host (10.10.1.100) must come before the deny for the entire 10.10.0.0/16 range to ensure the exception is honored. The final permit ip any any allows all other non-management traffic, which is necessary to avoid dropping legitimate traffic on the management interface.
What should I do if I get this 350-601 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This 350-601 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 350-601 exam.
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