Question

question 15 which type of ipv6 address is not routable and used only for communication on a single subnet? unique local address loopback address link - local address unspecified address global unicast address

Explanation:

Link - local addresses in IPv6 are used for communication within a single link (subnet) and are not routable across different subnets. Unique local addresses have some limited routing capabilities within an organization's network. Loopback addresses are for testing and self - communication on a single device. Unspecified addresses are used when an address is not yet assigned. Global unicast addresses are routable globally.

Answer:

C. Link - local address