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Networking Beginner

What is DNS (Domain Name System)?

A hierarchical naming system that translates human-readable domain names into IP addresses.

DNS acts as the internet's phone book. When you type "example.com," DNS resolves it to an IP address like 93.184.216.34. The resolution process involves recursive resolvers, root servers, TLD servers, and authoritative nameservers.

Common record types include A (IPv4), AAAA (IPv6), CNAME (alias), MX (mail), TXT (verification), and NS (nameserver). DNS caching reduces lookup times with TTL (Time To Live) values.

Related Terms

Token Bucket Algorithm
A rate limiting algorithm that allows burst traffic by accumulating tokens at a fixed rate and consuming them per request.
IP Address
A unique numerical label assigned to each device on a computer network for identification and communication.
CIDR Notation
A compact method for specifying IP addresses and their associated routing prefix using a slash followed by the prefix length.
NAT (Network Address Translation)
A method of mapping private IP addresses to public IP addresses, allowing multiple devices to share a single public IP.
HTTP/HTTPS
The protocol used for transferring web pages and data between browsers and servers, with HTTPS adding encryption.
WireGuard
A modern, lightweight VPN protocol that uses state-of-the-art cryptography and minimal code for fast, secure tunneling.
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