HTTP means Hyper Text Transfer Protocol underlying protocol used by the World Wide Web(www).
usa is the server name which is used address in the DNS record
.gov is the Domain names which are used to identify more then one IP addresses
Agencies/federal.shtml a directory is a collection of file resources also called the resource ID.
Since you are searching for researching information, .edu will be more reliable.
.edu is for education purpose, with credits of scholars.
.com is a general URL, it's not relavant to reliability.
The answer is d. full-duplex transmission. This communication setup allows for simultaneous transmit and receive for both parties. As signals are able to be transmitted at the same time two way for both parties, for both directions along the same data carrier medium.
