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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

Overlay Network
A virtual network built on top of an existing physical network, enabling features like container networking and VPNs.
Network ACL
A set of rules that control inbound and outbound traffic at the subnet level, acting as a stateless firewall in cloud and enterprise networks.
Network Topology
The physical or logical arrangement of nodes and connections in a computer network, such as star, mesh, ring, or bus configurations.
Network Monitoring
The practice of continuously observing network infrastructure to detect failures, performance degradation, and security threats.
Subnet
A logical division of an IP network into smaller segments to improve performance, security, and management.
DHCP
A protocol that automatically assigns IP addresses and network configuration to devices on a network.
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