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Networking Intermediate

What is IPv6?

The latest version of the Internet Protocol with 128-bit addresses, designed to replace IPv4 and solve address exhaustion.

IPv6 uses 128-bit addresses (e.g., 2001:0db8:85a3::8a2e:0370:7334), providing 340 undecillion unique addresses — enough for every device on Earth. It eliminates the need for NAT, simplifies routing, and includes built-in IPSec support.

IPv6 adoption is growing (40%+ of Google traffic). Dual-stack (running IPv4 and IPv6 simultaneously) is the common transition strategy. Key differences from IPv4 include no broadcast (replaced by multicast), auto-configuration (SLAAC), and simplified headers.

Related Terms

HTTPS Everywhere
The practice of securing all web traffic with TLS encryption, ensuring data integrity and privacy between browsers and servers.
Network Packet
A formatted unit of data carried over a network, containing headers with routing information and a payload with the actual data.
BGP (Border Gateway Protocol)
The routing protocol that makes the internet work by exchanging routing information between autonomous systems.
Firewall
A network security system that monitors and controls incoming and outgoing traffic based on predetermined rules.
Multicast
A network communication method that sends data to multiple recipients simultaneously without duplicating packets for each recipient.
Network Monitoring
The practice of continuously observing network infrastructure to detect failures, performance degradation, and security threats.
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