2.3.2 TCP/IP (APIPA)

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What IPv4 range is set aside for APIPA?

169.254.0.1 to 169.254.255.254

What is the default subnet on APIPA assigned address?

16bit. 255.255.0.0

Acronym: APIPA

Automatic Private IP Addressing

What IPv6 range is set aside for APIPA?

fe80::/10

When would a computer be unable to obtain an IP address automatically?

If it is unable to contact the DHCP server. It's unable to communicate with computers outside of the subnet.

How does APIPA know that no other computers on subnet have the same IP?

It sends out an ARP (Address Resolution Protocol) to the other computers on subnet.

What is APIPA?

Windows feature that automatically assigns an IP address to computer when it is unable to obtain one automatically.

Is APIPA configured by default if your system is set to obtain IP address automatically?

Yes.

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