[amp_mcq option1=”A protocol identifier” option2=”The letters, WWW” option3=”The unique registered domain name” option4=”WWW and the unique registered domain name E. A protocol identifier, WWW and the unique registered domain name” correct=”option1″]
The correct answer is: A. A protocol identifier.
A URL (Uniform Resource Locator) is a unique address that identifies a resource on the World Wide Web. It is a string of characters that specifies the protocol, domain name, and path to the resource.
The protocol identifier is the first part of the URL and specifies the type of protocol that will be used to access the resource. The most common protocols are HTTP (Hypertext Transfer Protocol) and HTTPS (Hypertext Transfer Protocol Secure).
The domain name is the second part of the URL and identifies the website or web page that contains the resource. The domain name is usually written in the form of a top-level domain (TLD) followed by a subdomain. The TLD is the last part of the domain name and indicates the type of website or web page. The most common TLDs are .com, .net, and .org.
The path is the third part of the URL and specifies the location of the resource on the website or web page. The path is usually written in the form of a directory hierarchy.
Therefore, the only option that must be contained in a URL is a protocol identifier.