Computer Science – The internet and its uses | e-Consult
The internet and its uses (1 questions)
Here's a breakdown of the roles:
DNS (Domain Name System): DNS acts like a phonebook for the internet. It translates human-readable domain names (like www.example.com) into numerical IP addresses (like 93.184.216.34) that computers use to locate each other. Without DNS, we would have to remember long strings of numbers to access websites.
HTTP (Hypertext Transfer Protocol): HTTP is the protocol used for transferring data between a web browser and a web server. It defines how the browser requests resources (like HTML, CSS, and JavaScript) and how the server responds. HTTP uses requests and responses to exchange information. It specifies the format of the data being transferred and the actions to be performed.
TCP (Transmission Control Protocol): TCP is a reliable, connection-oriented protocol that ensures data is transmitted accurately and in the correct order. It breaks data into packets, sends them across the network, and reassembles them at the destination. TCP provides error detection and correction, guaranteeing that the data arrives completely and without errors. It establishes a connection before data transfer and terminates it afterwards.
In summary, DNS allows the browser to find the server, HTTP allows the browser to request and receive the web page data, and TCP ensures that the data is transmitted reliably.