What type of reference is used to identify the location of webpages or files stored on other websites?

What are the two standard ports used by FTP along with their function?

A. UDP 23 control, TCP 20 data B. UDP 20 data, TCP 21 control C. TCP 21 control, TCP 20 data D. TCP 23 data, TCP 21 control

A ________ is specialized software that responds to client requests from Web brows- ers by providing resources.

a) host b) host name c) DNS server d) Web server