Question

List the DNS name resolution process.

Answer 1

The DNS name resolution process involves translating domain names into IP addresses through a series of queries to various DNS servers, including the browser’s cache, local DNS server, root server, TLD server, and the domain's own name server.

Step-by-step explanation:

DNS Name Resolution Process

The DNS name resolution process is an essential function of the internet that translates human-friendly domain names into IP addresses that computers use to identify each other on the network. Here is a simplified list of the steps involved in the DNS resolution process:

1. The user types a website address into their browser.
2. The browser checks if the IP address is stored in its cache. If it is, the process ends here.
3. If not, the browser sends a request to the local DNS server.
4. The local DNS server checks its cache for the record. If found, it returns the IP address.
5. If the local DNS server does not have the record, it forwards the request to a root name server.
6. The root server directs the request to a Top-Level Domain (TLD) server based on the domain's extension (like .com, .org).
7. The TLD server responds with the IP address of the domain's name server.
8. The local DNS server sends a query to the domain's name server.
9. The domain's name server replies with the IP address of the domain.
10. The local DNS server caches this information and sends the IP address to the user's browser.
11. The browser can now establish a connection to the web server hosting the website using the provided IP address.

This process ensures that users can easily access websites by name rather than having to remember complex numeric IP addresses.