Protocols and DNS

Question 1

How does a DNS work?

Answer 1

A DNS (Domain Name Server) is used to translate the URL to an IP Address. It does this by sending the domain name to the DNS, then, the DNS finds the corresponding IP Address of the domain name sent. This IP address is sent back to the browser. Finally, the browser uses the IP address to access the web page.

Question 2

What is HTTP?

Answer 2

HTTP is a set of rules that is used to send data across the internet.

Question 3

What is HTTPS?

Answer 3

This is a protocol that ensures a secure connection is made between the devices before engaging in the transfer of data. The data packets are encrypted before they are sent across the internet and decrypted once they reach their destination. HTTPS uses SSL and TLS

Question 4

How does SSL encryption work?

Answer 4

1. The web server sends a copy of its SSL certificate to the web browser
2. The web browser confirms the legitimacy of the certificate
3. If legit, the web browser sends a signal back to let the web server know
4. Connection begins