A bot can use a __________ to capture keystrokes on the infected machine to retrieve sensitive information.

What is the name of the IPv6 address that is the same as the IPv4 public addresses?

A. global address B. link-local address C. private D. broadcast

An alternative to each server being required to confirm identities of clients who request service is to use an _______ that knows the passwords of all users and stores them in a centralized database.

Fill in the blank(s) with the appropriate word(s).