When a computer configured to obtain an IP address automatically is unable to reach a Dynamic Host Configuration Protocol (DHCP) server, which IP address range will it most likely assign to itself?
Automatic Private IP Addressing (APIPA) allows a computer to assign itself an IP address in the absence of a DHCP server. This functionality, defined in RFC 3927 as link-local addressing, uses a designated range of addresses from 169.254.0.1 through 169.254.255.254. The computer randomly chooses an IP address within this range, allowing for basic communication with other devices on the same local network. This is intended as a temporary solution until a DHCP server can be reached. The 192.168.x.x range is a private IP address space defined by RFC 1918, commonly used in local networks. The 127.0.0.0/8 range (e.g., 127.0.0.1) is reserved for loopback addresses, which are used for network software testing on the local machine. The final option is a subnet mask, not an IP address range; it is used with an IP address to define the network and host portions of the address.
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