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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

OSI Model
The seven-layer Open Systems Interconnection model that standardizes network communication functions from physical transmission to application protocols.
Reverse Proxy
A server that sits between clients and backend servers, forwarding client requests and returning server responses on their behalf.
BGP (Border Gateway Protocol)
The routing protocol that makes the internet work by exchanging routing information between autonomous systems.
TCP/IP
The fundamental communication protocol suite of the internet that defines how data is packaged, addressed, transmitted, and received.
DNS (Domain Name System)
A hierarchical naming system that translates human-readable domain names into IP addresses.
Token Bucket Algorithm
A rate limiting algorithm that allows burst traffic by accumulating tokens at a fixed rate and consuming them per request.
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