Stage 1 · Lesson 6 of 8
IPv6 addressing
addresses are 128 bits, written as eight groups of four hex digits, such as 2001:db8:10:20::1. Two shortening rules apply: leading zeros in a group can be dropped, and one run of all-zero groups can be replaced by a double colon. Every IPv6 interface has a link-local address starting fe80, used only on that link, and usually a global unicast address that is routable.
almost always use a /64, and hosts can configure themselves with SLAAC (stateless address autoconfiguration) from advertisements, or through DHCPv6. There is no in IPv6; multicast does that job. Operators, mobile networks and clouds rely on IPv6 now.
Common trapusing the double colon twice in one address, which makes it ambiguous and invalid.
A question to check yourself, an AI practice session and 1 cheat sheet entry come with the full roadmap. Unlock
Resources for this stage
Start with· follow one of these
- PlatformFreeCisco Networking Academy
Cisco · Beginner
Start with the free, self-paced Networking Basics course; it uses Packet Tracer from the first modules
- VideoFreeComputer Networking: A Top-Down Approach (Video Lectures)
Jim Kurose and Keith Ross · Intermediate
Free university-level lectures from the authors of the classic textbook, for the why behind every layer
Practise
Keep handy
Also worth your time
A clear comparison of the two transport protocols and when each one fits
- Beej's Guide to Network ProgrammingGo deeper
If you code, write a tiny TCP and UDP client and server to see the transport layer from the inside