Server+ PBQ Lab: Multi-VLAN DHCP, DNS, and Routing Outage

In this Server+ PBQ lab, you are troubleshooting a segmented network outage after a recent infrastructure change. One client VLAN is failing DHCP and falling back to APIPA, a moved application server has partial network reachability, and DNS appears to work for simple lookups while still breaking application repository validation.

You must inspect the client, server, DHCP, DNS, L3 switch, firewall, and logs to identify the full failure chain and choose the clean remediation that restores service without creating a security or persistence problem.