Computer Science

Tim Berners-Lee is credited with inventing the World Wide Web between 1989 and 1991, developing the first web browser and server, which laid the foundation for the modern internet.

Digital Subscriber Line (DSL) technology provides internet access by transmitting digital data over the wires of a local telephone network, enabling high-speed internet connections without interfering with voice services.

Tim Berners-Lee is credited with inventing the World Wide Web. Robert Caillou is not known as a co-inventor, and the other options are incorrect. The question incorrectly suggests Robert Caillou was a co-inventor, which is not supported by historical records.

ICT stands for Information and Communication Technology, which refers to technologies that provide access to information through telecommunications. This is the widely accepted and correct expansion of the acronym ICT.

Telnet is a network protocol used to provide a bidirectional, interactive, text-based communication facility for remote login to another host over a TCP/IP network. It allows a user to open a virtual terminal on a remote system, transmitting keystrokes and receiving display output. It is not a gateway, search engine, or browser protocol. The correct description is that Telnet is a network protocol for remote access via command-line interface.

An IP address uniquely identifies a device on the internet, allowing it to send and receive data. It is not a domain name, web browser, or search engine, which serve different functions.

HTML (HyperText Markup Language) is the fundamental language used to create and structure web pages, making option C the correct answer.

HTML header tags range from <h1> to <h6>. By default, <h1> is the largest header and <h6> is the smallest. Among the given options (H1, H2, H3, H4), H4 is the smallest header tag by default. The question asks for the smallest header among the options provided, so the correct answer is H4.

SEO (Search Engine Optimization) is the process of optimizing a website to improve its ranking in search engine results, making it the most effective method among the options listed. PPC (Pay-Per-Click) is a paid advertising method, affiliate marketing involves promoting products for commission, and social media is a platform for engagement, not a direct ranking method.

A search engine uses software called a 'spider' (or crawler) to automatically browse and index documents on the internet, enabling efficient search functionality.