to be used for web servers that distinguished virtual servers based on the IP

address. However, that is remote past. To distinguish between virtual servers

running on the same host, a HTTP header \uv{\texttt{Host:}} is used. Similarly,

\item The fact that the system starts listening on a port means that a TCP

handshake is performed and data is being accepted. The data is stored

in a fixed length buffer and after it is filled out, the connection is still