Which of the following steps can be taken to configure multiple Web sites to use port 80 as their default and to secure transactions?

Some Web servers can be configured to listen for HTTP requests for multiple Web sites on a single server. Which of the following steps can be taken to configure multiple Web sites to use port 80 as their default and to secure transactions?

A.
Use separate host header names for each Web site.

B.
Install IIS and Apache on the same server to host multiple Web sites.

C.
Bind multiple IP addresses to a single NIC on the server.

D.
Configure the firewall to accept multiple HTTP requests.