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Security Fundamentals Simulator
Standard ACL Simulator
Build a numbered or named standard ACL on R1. Send packets from PC-A/B/C to the server zone, watch them get permitted or denied. Implicit deny, shadow detection, and 6 exam scenarios baked in.
📡 Send Test Packet
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Speed
⚙️ ACL 10: Rule Builder
📍 Standard ACL Placement Rule: Standard ACLs filter SOURCE IP only. They cannot see the destination. Always apply them as close to the destination as possible to avoid accidentally blocking traffic to other networks. This ACL is applied outbound on Gi0/1 (toward the server zone).
Remark
Action
Src IP
⚠️ Shadow detected: these rules can never be reached:
| Seq | Action | Source IP / Wildcard | Hits | Order |
|---|
Practice: ACL fundamentals & edge cases
Score: 0 / 0
Mixed questions about ACL syntax, placement, wildcards, and exam traps. Next button on right and wrong.
Question
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Drill this into reflex
Claim my free session →When a 'deny any' lands two rules too high
1:1 mentorship with real ACL debug scenarios, lab reviews, and US interview prep. Free first session. No card on file.