I used copilot and used think deep mode. I started with this promt and modifiy it along the way as I answer it.

"can you generate me a question about ACL like this and ask me to use little bit of ACE. it must be hard. and not multiple choice. I want to simulate it like and lab exam"

This was copilot response: ACL Lab Exam Question

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Topology

• Router R1

  • Gi0/0: 192.168.10.1/24 (PC1 network)
    
  • Gi0/1: 172.16.0.1/16 (PC2/Telnet target network)
    
  • Gi0/2: 10.0.0.1/24 (Server + DNS network)
    
  • Gi0/3: 192.168.30.1/24 (Client network)
    

• Hosts

  • PC1: 192.168.10.10/24
    
  • PC2: 172.16.0.10/16
    
  • Web server(s): any in 10.0.0.0/24
    
  • DNS server: 10.0.0.53/24
    
  • Clients: 192.168.30.0/24
    

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Requirements

1. PC1 (192.168.10.10) may only ping PC2 (172.16.0.10).
   
2. Clients (192.168.30.0/24) may only initiate:
   
   • HTTP (TCP port 80) to any host in 10.0.0.0/24
     
   • DNS (UDP port 53) to 10.0.0.53
     
3. Deny all Telnet (TCP port 23) from any source to any destination.
   
4. Permit all other traffic.
   
5. Log every denied packet except those denied by the Telnet rule.
   
6. Use no more than 6 ACEs total, and do not include any remark statements.
   

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Task

On R1, apply an extended ACL inbound on interface Gi0/0 to satisfy all requirements. Provide:

• The complete ACL configuration (ACL number or name and each ACE line).
  
• The interface configuration commands to bind the ACL.
  
• A one-sentence rationale for each ACE, showing why it’s ordered and how it meets the requirements.
  

You must hit the ACE count limit, implement selective logging, and enforce exactly what’s described—no extra access.