Final answer:
The subnet portion of the given address A. CaféB. 1111 is 1111.
Step-by-step explanation:
The given address, A. Café(B). 1111, can be represented as A. CaféB. 1111
Given the /48 Global Routing Prefix and the /64 subnet prefix, we can deduce that the subnet portion of the address is 1111. This is because the /64 prefix specifies that the first 64 bits of the address are fixed, leaving the remaining 16 bits as the subnet portion.
Therefore, the subnet portion of the given address is 1111.