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Internet protocol version 6

Internet protocol version 6. BY LIKITHA.S. INTRODUCTION. Also known as IPng (next generation) Developed to alleviate IPv4 address exhaustion A new version of the Internet Protocol Improve upon IP protocol based on operational experience of IPv4 in the Global Internet

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Internet protocol version 6

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  1. Internet protocolversion6 • BY • LIKITHA.S

  2. INTRODUCTION • Also known as IPng (next generation) • Developed to alleviate IPv4 address exhaustion • A new version of the Internet Protocol • Improve upon IP protocol based on operational experience of IPv4 in the Global Internet • 128 bit addressing • Simplified header makes forwarding algorithms more efficient • New extensions and options • IPv6 provides a platform for new Internet functionality that will be needed in the immediate future, and provide flexibility for further growth and expansion

  3. FEATURES OF IPv6 • Larger Address Space • Flexible Header Format • Improved Options • Provision for Protocol Extension • Support for Auto-configuration and Renumbering • Security • Efficient and extensible IP datagram • Routing

  4. LARGER ADDRESS SPACE IPv4 32 bits= 4,294,967,296 possible addressable devices IPv6 128 bits: 4 times the size in bits = 3.4 x 1038 possible addressabledevices = 340,282,366,920,938,463,463,374,607,431,768,211,456 ∼ 5 x 1028 addresses per person on the planet

  5. IP v6 ADDRESSING • IPv6 Addressing rules are covered by multiples RFCs Architecture defined by RFC 4291 • Address Types are : Unicast : One to One (Global, Unique Local, Link local) Anycast : One to Nearest (Allocated from Unicast) Multicast : One to Many • A single interface may be assigned multiple IPv6 addresses of any type (unicast, anycast, multicast). No Broadcast Address.

  6. IPv4 & IPv6 Header Comparison IPv4 Header IPv6 Header - field’s name kept from IPv4 to IPv6 - fields not kept in IPv6 - Name & position changed in IPv6 - New field in IPv6 Legend

  7. IPv6 header TCP header + data next header = TCP IPv6 header Routing header TCP header + data next header = Routing next header = TCP IPv6 header Routing header Fragment header fragment of TCP header + data next header = Routing next header = Fragment next header = TCP IPv6 Extension Headers

  8. Extension Headers • Routing – Extended routing, like IPv4 loose list of routers to visit • Fragmentation – Fragmentation and reassembly • Authentication – Integrity and authentication, security • Encapsulation – Confidentiality • Hop-by-Hop Option – Special options that require hop-by-hop processing • Destination Options – Optional information to be examined by the destination node

  9. IP v6 DATAGRAM HEADER AND PAYLOAD IP V6 PACKET • Each packet is composed of a mandatory base header followed by the payload. • The payload consists of two parts optional extension headers and data from an upper layer. • The base header occupies 40 bytes , whereas the payload contains upto 65,535 bytes of information.

  10. Thank You

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