A network technician is installing a network-attached security camera on a company subnet designed for . After connecting the camera to an Ethernet wall jack, the technician accesses the camera's status interface and observes the following network details:
- IP Address:
- Subnet Mask:
- Default Gateway: [Blank]
The camera can communicate with a laptop temporarily plugged into the same local switch, but it cannot be accessed by the video management server located on the subnet. Which of the following best explains why the camera cannot reach the management server?
- The camera failed to reach a DHCP server and self-assigned an Automatic Private IP Addressing (APIPA) address, which is non-routable across subnets.Cevap
- BThe local DNS server failed to lease an IP address to the camera, causing the camera to revert to an unassigned local broadcast state.
- CThe camera was automatically assigned a static public IP address, but its port is blocked by a Layer 2 switch.
- DThe camera requires an unmanaged Layer 2 switch to translate APIPA addresses into standard IPv4 packet headers before routing.
Cevap
The camera failed to reach a DHCP server and self-assigned an Automatic Private IP Addressing (APIPA) address, which is non-routable across subnets.
An IP address starting with 169.254.x.x indicates that the network device attempted to obtain an IP address via DHCP but received no response. As a fallback, the operating system generated an Automatic Private IP Addressing (APIPA) address. APIPA addresses allow local Layer 2 communications (explaining why a direct local switch connection works), but because APIPA does not configure a default gateway and is non-routable, packets cannot leave the local subnet to reach the video management server.
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APIPA / IPv4 Link-Local Addressing and DHCP Failure Symptoms