What is the name given to the primary or introductory page of a website, which usually acts as an index for navigation? MCQ with Answer and Explanation

Explanation:
XML (eXtensible Markup Language) and JSON are commonly used for data interchange in AJAX. However, XML is the 'X' in AJAX, though JSON is now more prevalent.

Explanation:
MIME (Multipurpose Internet Mail Extensions) extends the format of email to support text in character sets other than ASCII, as well as attachments, images, audio, etc.

Explanation:
Ping uses ICMP echo requests to test reachability of a host and measure round-trip time, a basic network diagnostic tool.