How can I achieve webpage redirection (or URL redirection) in apache)

How can I achieve webpage redirection (or URL redirection) in apache-Linux Enterprise Application-Linux server application information? For details, refer to the following. How can I achieve webpage redirection (or URL redirection) in apache ?), For example, I can jump to the http://www.a.com when entering the http://www. B .com in the browser, (the browser address bar shows the http://www. B .com) how to achieve it? But the accessed content is still http://www.a.com content

APACHE version: Apache/2.0.52 system: AS4

In addition
1, can be changed to the form of IP, such as the input IP: http: // 202. 106. *. * Can Jump directly to the http://www. B .com.
2. Is there any command or method in APACHE to view installed modules?

Thank you!