When deploying IPv6, which of the following is considered perhaps the most critical and difficult task?

Use a Web ____________________ to preview a report as a Web page.

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

The lack of authentication for computers on the Internet make IP _____________ possible, which is a change in the IP addresses in the headers of malicious packets.

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