What is the dotted decimal equivalent of a /32 prefix length?

A /32 prefix length indicates that all 32 bits of an IPv4 address are used for the network portion, which means there are no bits left for host addresses. In terms of IP addressing, this is typically used for a singular host or a loopback interface.

To convert the prefix length into a dotted decimal format, we focus on the subnet mask. A /32 prefix means the subnet mask has all bits set to 1, which results in an IP address where each octet is full (11111111 in binary). When this binary representation is translated to decimal, it yields 255 for each of the four octets. Therefore, the complete subnet mask for a /32 is 255.255.255.255. This is why the correct answer is the dotted decimal equivalent of a /32 prefix length is 255.255.255.255.

The other options presented do not represent a /32 mask since they have fewer bits set, allowing for varying numbers of hosts in a subnet, which does not align with the singular addressing that a /32 represents.