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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

ICMP (Internet Control Message Protocol)
A network protocol used for diagnostic and error reporting, including ping and traceroute functionality.
HTTP/HTTPS
The protocol used for transferring web pages and data between browsers and servers, with HTTPS adding encryption.
ARP (Address Resolution Protocol)
A protocol that maps IP addresses to physical MAC addresses on a local network segment.
HTTPS Everywhere
The practice of securing all web traffic with TLS encryption, ensuring data integrity and privacy between browsers and servers.
MTU (Maximum Transmission Unit)
The maximum size of a data packet that can be transmitted over a network without fragmentation.
Proxy Server
An intermediary server that forwards requests between clients and destination servers, providing caching, filtering, or anonymity.
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