What are the differences between ipv4 and ipv6?

indigowinged

The commands are to show what commands can be used, no example are shown. The article will be updated will be periodically updated with more information.

Internet Protocol

Question	IPv4	IPv6
What is IPv6?	The next version of the Internet Protocol (IP)
How many bit does it have?	32 bit address	128 bit address
Does it use NAT?	Yes	No
Does it use Broadcast?	Yes	No
Does it use ARP?	Yes	No
Does it use Multicast?	Yes	Yes
Does it use Unicast?	Yes	Yes
What is the numbering system?	Decimal	Hexadecimal
What is the loopback address?	127.0.0.1/8	::1/128, ::1
Is IPsec required?	Optional	Built-In

Packet Structure IPv4

Someone people have done a perfect job already; plus more in-depth information: https://en.wikipedia.org/wiki/IPv4#Packet_structure

Packet Structure IPv6

Someone people have done a perfect job already; plus more in-depth information:
https://en.wikipedia.org/wiki/IPv6_packet

Commands

Function	IPv4	IPv6
ICMP	ping	ping6
Trace a route	traceroute	traceroute6, later versions just traceroute
Routes	route, ip	route -6, inet6, also ip -6
Packet capture	tcpdump	tcpdump, later versions support IPv6
DNS	host	host -6
DNS	dig	dig -6
DNS	nslookup	nslookup (search AAAA)
Connection	telnet	telnet (updated for IPv6)
Connection	ssh	ssh -6
Network Interface	ifconfig, ip	ifconfig, ip -6 (inet6)