Demonstrates the functioning
• when accessing a page at the URL (http://rmutk.ac.th/register/semester/)
• browser resolves the server name of the URL (rmutk.ac.th) into an Internet Protocol
address using the globally distributed Domain Name System (DNS)
• returns an IP address such as 203.19.155.8
• browser then requests the resource by sending an HTTP request across the Internet
to the computer at that address.
• requests service from a specific TCP port number (80) that is well known for the
HTTP service.
• fulfill the request and web server it sends an HTTP response back to the browser
indicating success