Chapter 7 · Watch, then practise
Introduction to IPV6
Read IPv6 addresses and compare IPv6 forwarding with IPv4. Focus on address representation, destination types and the division between a fixed base header and extension headers.
3 questions · 3 with related videos. Matches are based on playlist titles; broader background matches are labeled.
What to study
- 128-bit addresses
- Address compression
- Unicast, multicast and anycast
- IPv6 headers
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Notes
L57: IPv6 Introduction | IPv6 Addresses Notations, Zero Compression, Packet Format, Changes in IPv6
Easy Engineering Classes · 24:44
Supplementary IPv6 address-notation lecture explicitly covers zero compression.
1. Compress an address
Shorten 2001:0db8:0000:0000:0000:0000:0000:0042.
2001:db8::42 removes leading zeros in each group and replaces a consecutive run of zero groups with ::. Use :: at most once in an address so that expansion back to eight 16-bit groups is unambiguous.
L57: IPv6 Introduction | IPv6 Addresses Notations, Zero Compression, Packet Format, Changes in IPv6
Easy Engineering Classes · 24:44 · Background lecture
IPv6 addressing background for the destination categories in this question.
2. Destination types
What is the difference between IPv6 unicast, multicast and anycast?
Unicast identifies one interface. Multicast identifies a group and delivers to its members. Anycast identifies a set but delivers to one member according to routing. IPv6 has no broadcast address; multicast provides the corresponding group-delivery function.
Lec-58: IPv6 Header Format in Hindi | IPv4 Vs IPv6 in Computer Networks
Gate Smashers · 13:07 · Background lecture
IPv6-header background for understanding the packet-format differences; consult the answer for the router-fragmentation rule.
3. An oversized IPv6 packet
Can an IPv6 router fragment a packet to fit the next link?
No. Fragmentation is performed by the source, with a Fragment extension header when needed. A forwarding router that cannot send the packet because of its size discards it and returns an ICMPv6 Packet Too Big message. The IPv6 base header is 40 bytes.