What is IPv6? What are the benefits of IPv6 Addressing? Write the historical development of IPng.

Internet Protocol version 6 (IPv6)  is  the  latest  revision  of  the Internet  Protocol (IP),  days
of  IPv6  protocol  development  stage  the communications  protocol that  routes  traffic  across
the Internet.  IP  stands  for  Internet  Protocol  which  is  one  of  the  main  pillars  that  supports  the
called  IPng  in  the  early.  It  is  intended  to  replace IPv4.  IPv6  was  developed  by  the Internet
Engineering  Task  Force (IETF)  to  deal  with  the  long-anticipated  problem  of IPv4  address

Every  device  on  the  Internet,  such  as  a  computer  or  mobile  telephone,  must  be  assigned
an IP  address for  identification  and  location  addressing  in  order  to  communicate  with  other
devices.  With  the  ever-increasing  number  of  new  devices  being  connected  to  the  Internet,
the  need  arose  for  more  addresses  than  IPv4  is  able  to  accommodate.  IPv6  uses  a  128-
bit address,  allowing  2128,  or  approximately 3.4×1038 addresses,  or  more  than 7.9×1028 times
as  many  as  IPv4,  which  uses  32-bit  addresses.  IPv4  allows  only  approximately  4.3  billion
addresses.  IPv6  provides  enough  addresses  to  allow  the  Internet  to  continue  to  expand  and  the
industry  to  innovate.  It  is  not,  however,  directly  compatible  with  IPv4,  meaning  that  a  device
connected  via  IPv4  cannot  communicate  directly  with  a  device  connected  using  IPv6.  IPv6

During  the  late  1980s  (88-89)  Internet  has  started  to  grow  exponentially.  The  ability  to  scale
Internet for future demands requires a limitless supply of IP addresses and improved mobility. In
to develop a new protocol for Internet. In 1994 IETF gave a clear direction of IPng or IPv6 after
a long process of discussion.

Benefits of IPv6:

More Efficient Routing: IPv6  reduces  the  size  of  routing  tables  and  makes  routing  more
efficient  and  hierarchical.  IPv6  allows  ISPs  to  aggregate  the  prefixes  of  their  customers'

More Efficient Packet Processing: IPv6's  simplified  packet  header  makes  packet  processing
more efficient. Compared with IPv4, IPv6 contains no IP-level checksum, so the checksum does
because most link-layer technologies already contain checksum and error-control capabilities.

Directed Data Flows: IPv6  supports  multicast  rather  than  broadcast.  Multicast  allows
bandwidth-intensive  packet  flows  (like  multimedia  streams)  to  be  sent  to  multiple  destinations

simultaneously, saving network bandwidth. Disinterested hosts no longer must process broadcast

Simplified Network Configuration: Address  auto-configuration  (address  assignment)  is  built
in to IPv6. A router will send the prefix of the local link in its router advertisements. A host can
Universal Identifier (EUI) 64-bit format, to the 64 bits of the local link prefix.

Security: IPSec, which provides confidentiality, authentication and data integrity, is baked into
in  IPv6.  Because  of  their  potential  to  carry  malware,  IPv4  ICMP  packets  are  often  blocked  by
corporate  firewalls,  but  ICMPv6,  the  implementation  of  the  Internet  Control  Message  Protocol

• August 1990
– First wakeup call by Solensky in IETF on IPv4 address exhaustion
• December 1994

• December 1994

• January 1995

• December 1995

• December 1998


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