A system administrator receives a support ticket from a workstation user who cannot access internal file shares or the internet following a network switch reboot. Running `ipconfig /all` on the client machine displays an IPv4 address of `169.254.44.102`, a subnet mask of `255.255.0.0`, and a blank default gateway. The network interface card (NIC) status indicator shows a solid green link light with flickering activity. Which of the following is the MOST likely cause of this network issue?
- The client workstation was unable to communicate with a DHCP server and generated an APIPA address.Cevap
- BThe primary corporate DNS server is offline and failing to issue dynamic IP address leases.
- CThe physical Ethernet cable between the workstation and wall port is disconnected or broken.
- DThe workstation requires a Layer 2 switch to route packets across local IP subnet boundaries.
Cevap
The client workstation was unable to communicate with a DHCP server and generated an APIPA address.
An IPv4 address beginning with 169.254.x.x (with subnet mask 255.255.0.0) signifies an Automatic Private IP Addressing (APIPA) self-assignment. This occurs when a DHCP client requests an IP lease but receives no response from any local or relay DHCP server. Because APIPA does not configure a default gateway, communication is limited strictly to local subnet hosts.
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APIPA Address Assignment and DHCP Failure Troubleshooting