What must occur before a workstation can exchange HTTP packets with a web server?
A.
A UDP connection must be established between the workstation and its default gateway.
B.
A UDP connection must be established between the workstation and the web server.
C.
A TCP connection must be established between the workstation and its default gateway.
D.
A TCP connection must be established between the workstation and the web server.
E.
An ICMP connection must be established between the workstation and its default gateway.
F.
An ICMP connection must be established between the workstation and the web server.
Explanation:
Explanation/Reference:
HTTP uses TCP port 80.
http://pentestlab.wordpress.com/2012/03/05/common-tcpip-ports/
A web server is a computer system that processes requests via HTTP, the basic network protocol used to distribute information on the World Wide Web. The term can refer either to the entire system, or specifically to the software that accepts and supervises the HTTP requests.
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The Internet Control Message Protocol (ICMP) is one of the main protocols of the Internet Protocol Suite. It is used by network devices, like routers, to send error messages indicating, for example, that a requested service is not available or that a host or router could not be reached.
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