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5.10. Reflection Checkpoint

Key Takeaways

Before proceeding, ensure you can:

  • Configure NAT (static, dynamic, and PAT) and verify translations with show ip nat translations
  • Explain WHY DHCP relay is necessary when clients and servers are on different subnets
  • Configure NTP clients and understand the stratum hierarchy for time accuracy
  • Apply the syslog severity scale to filter logs at appropriate levels
  • Describe how QoS classification, marking, and queuing work together to prioritize traffic

Connecting Forward

In Phase 6, you'll learn how to protect the services and infrastructure you've configured. DHCP snooping prevents rogue DHCP servers from disrupting the DHCP process you learned here. ACLs filter the traffic that NAT translates. Understanding these services is essential for securing them properly.

Self-Check Questions

  1. A branch office has 50 users but only one public IP address. Which NAT type would you configure, and what additional identifier allows all 50 users to share that single address?
  2. An administrator configured logging trap 4 on a router. Which message types will be sent to the syslog server, and which will be filtered out?
  3. DHCP clients in a remote subnet aren't receiving addresses even though the DHCP server is functioning correctly. What configuration is missing, and on which device?