Question

question 2
what is the prefix associated with the ipv6 address 2001:db8:d15:ea:cc44::1/64?
2001:db8::/64
2001:db8:d15:ea:cc44::/64
2001::/64
2001:db8:d15:ea::/64

Explanation:

In an IPv6 address with a /64 prefix - length, the first 64 bits represent the network prefix. The address 2001:DB8:D15:EA:CC44:1/64 has the first 64 - bit network prefix 2001:DB8:D15:EA::/64.

Answer:

2001:DB8:D15:EA::/64