1. The output printed from the computer is called a hard copy.

2. “When we see any text or image or any design inside any computer software, then to make that design or text a document, with the help of a printer, with the help of a hard copy generator. If it is printed on paper, then that printed paper is called a Hard Copy”.

1. Computers on the Internet are uniquely identified through their IP address.

2. IP address (Internet Protocol address) is a digital address used to identify a computer or device on the Internet or any other network.

3. IP address is a set of four numbers. It is in this format 191.150.1.38. Is visible in. The set of numbers for an IP address ranges from 0 to 255. That means the IP address ranges from 0.0.0.0 to 255.255.255.255.

1. A website is a collection of web pages.

2. A website (also written as a website) is a collection of web pages and related content identified by a common domain name and published on at least one web server.

3. A group of related web pages makes up a website.

4. Some examples of a website include-

- News websites, such as CNN.com and BBC.com

- E-commerce websites, such as Amazon.com and eBay.com

- Social media websites, such as Facebook.com and Twitter.com

- Personal websites, such as About.me and Blogger.com

1. Optical fibres use total internal reflection to transfer data. The primary condition for total internal reflection is that the signal must travel from an optically denser medium to an optically rarer medium. Secondly, the angle of incidence must be greater than the critical angle.