july 2 apipa

Which IP address range is reserved for APIPA?

169.254.0.0 to 169.254.255.255 is reserved for Automatic Private IP Addressing (APIPA).

What is the purpose of APIPA?

APIPA automatically assigns an IP address to a device when a DHCP server is unavailable, allowing limited local network communication.

Under what condition does a Windows device assign itself an APIPA address?

When the device is configured for DHCP but cannot contact a DHCP server.

Can a device with an APIPA address communicate with the internet?

No. APIPA addresses only allow local communication within the same subnet; they are not routable to the internet.

How can you verify if a system is using an APIPA address?

Run ipconfig on Windows and check for an IP in the 169.254.x.x range.

Which protocol is responsible for checking IP address conflicts in APIPA assignment?

ARP (Address Resolution Protocol) is used to detect if the selected APIPA address is already in use on the local network.

What should a technician check if a device has an APIPA address?

Check the DHCP server status and the device's network configuration to ensure it's set to obtain an IP address automatically.

What is the subnet mask associated with APIPA?

The default subnet mask for APIPA is 255.255.0.0.

What is a common sign that a computer has failed to obtain a DHCP address?

The computer has an IP address starting with 169.254, indicating it has fallen back to APIPA.

Multiple Choice: Which of the following addresses is an APIPA address?

a. 10.0.0.1

b. 192.168.1.1

c. 172.16.0.1

d. 169.254.32.5

d. 169.254.32.5 is within the APIPA range and indicates automatic assignment due to DHCP failure.