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Networking Intermediate

What is Subnet?

A logical division of an IP network into smaller segments to improve performance, security, and management.

Subnetting divides a large network into smaller, more manageable sub-networks. A subnet mask (e.g., 255.255.255.0 or /24) defines the network and host portions of an IP address.

Benefits include reduced broadcast traffic, improved security through isolation, and efficient IP address allocation. CIDR notation (/24, /16, etc.) specifies subnet sizes concisely.

Related Terms

DNS Record Types
Different types of DNS entries that map domain names to various information like IP addresses, mail servers, and verification strings.
Network Monitoring
The practice of continuously observing network infrastructure to detect failures, performance degradation, and security threats.
WireGuard
A modern, lightweight VPN protocol that uses state-of-the-art cryptography and minimal code for fast, secure tunneling.
ARP (Address Resolution Protocol)
A protocol that maps IP addresses to physical MAC addresses on a local network segment.
SSL/TLS Certificate
A digital certificate that authenticates a website identity and enables encrypted HTTPS connections.
TCP vs UDP
Two transport layer protocols: TCP provides reliable, ordered delivery while UDP provides fast, connectionless delivery without guarantees.
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