Final answer:
A /48 site prefix can support a maximum of 65,536 subnets.
Step-by-step explanation:
A /48 site prefix can support a maximum of 65,536 subnets. In IPv6 addressing, a site can be assigned a /48 prefix, which means it has 48 bits to allocate to its subnets. Each bit can be either 0 or 1, giving a total of 2^48 possible combinations. However, some subnets may be reserved for specific purposes (such as loopback or multicast), so the actual number of usable subnets may be slightly lower. Additionally, it's important to note that having a large number of subnets can create management challenges and may not always be necessary for a given network.