A mobile workstation user moves across an office floor and suddenly loses access to networ… — CompTIA Network+

A mobile workstation user moves across an office floor and suddenly loses access to network resources. Upon checking the client's network settings, a technician observes an IP address of $169.254.112.45$ . What is the primary cause of this wireless connectivity issue?

The wireless client failed to receive an IP address assignment from the DHCP server.Answer
B
The default gateway address was configured on an incompatible IP subnet.
C
The wireless access points are operating on overlapping 2.4 GHz channels.
D
The wireless network adapter has experienced a duplex mismatch with the switch port.

Answer

The wireless client failed to receive an IP address assignment from the DHCP server.

An IP address within the

169.254.0.0/16

range indicates an Automatic Private IP Addressing (APIPA) assignment. This occurs when a wireless client cannot reach a DHCP server to obtain or renew a valid IP address lease upon connecting or roaming.

Step-by-Step Solution

Identify the IP address pattern shown on the client device.

The address

169.254.112.45

falls within the

169.254.0.0/16

APIPA address range.

APIPA addresses are automatically self-assigned by client operating systems when DHCP discovery fails.

Determine why APIPA was assigned during wireless roaming.

The client lost connectivity to the DHCP server or failed to renew its lease when transitioning between access points.

When DHCP requests time out, the client cannot communicate on the local network.

Key Concept

APIPA Address Assignment in Wireless Troubleshooting

Question

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

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