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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

Network Monitoring
The practice of continuously observing network infrastructure to detect failures, performance degradation, and security threats.
SSL/TLS Certificate
A digital certificate that authenticates a website identity and enables encrypted HTTPS connections.
SDN (Software-Defined Networking)
An approach that separates the network control plane from the data plane, enabling centralized, programmable network management.
Proxy Server
An intermediary server that forwards requests between clients and destination servers, providing caching, filtering, or anonymity.
SNMP (Simple Network Management Protocol)
A protocol for monitoring and managing network devices like routers, switches, servers, and printers remotely.
VLAN (Virtual LAN)
A logical grouping of network devices that creates separate broadcast domains on the same physical network infrastructure.
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