Your computer can catch a virus if you download an executable program from an untrustworthy site and then open it. Viewing images, filling out forms and so on is harmless. So, most likely, is downloading a program from a respectable source with a reputation to protect. A Web Browser is an application that knows how to interpret and display documents on the World Wide Web. Netscape and Microsoft Internet Explorer are common web browsers in use today.
Cookies help Web sites maintain user states.
The first page on a World Wide Web site, to which supporting pages are linked. A service that sends messages on computers via local or global networks. These protocols were developed to enable communication between different types of computers and computer networks. The Internet Protocol is a connectionless protocol which provides packet routing. TCP is connection-oriented and provides reliable communication and multiplexing.