Final answer:
An ISP supporting IPv6 can allocate a /48 routing prefix commonly for business customers, but a /24 prefix is associated with IPv4, not IPv6, which makes the statement partially true.
Step-by-step explanation:
The question is asking whether an Internet Service Provider (ISP) that supports IPv6 can allocate a /24 or /48 routing Prefix. The answer is TRUE for a /48 routing prefix but FALSE for a /24 routing prefix. In IPv6, common allocation ranges for end users are usually a /48 for business customers or a /56 for residential customers. Each organization could further split a /48 subnet into multiple /64 subnets for different networks within their operation. A /24 prefix typically does not apply to IPv6 as it is a subnet size associated with IPv4 addressing.