The document provides an overview of IPv6 including: 1. IPv6 was developed due to address depletion issues with IPv4 and features a 128-bit address compared to IPv4's 32-bit address, providing vastly more address space and eliminating concerns about future address depletion. 2. The structure of IPv6 addresses is fundamentally different than IPv4 addresses, using eight 16-bit segments. 3. IPv6 packet format includes a base 40-byte header and optional extension headers between the header and payload up to 65,535 bytes in length.

1. A PRESENTATION ON:
IPV6
SUBJECT : COMPUTER NETWORKS
SUBJECT CODE :3161007
SEMESTER : 6TH (B-3)
Name: Kirti H Mandal
Enrollment No.: xyz
Guided by :Prof. Pritesh Vasava

2. CONTENT
1. Itroduction to IPv6
2. IPv6 Addressing
3. Ipv6 Packet format
4. Features of IPv6
5. Advantages of IPv6
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3. INTRODUCTION TO IPV6
• An IPv6 address is a 128bits address divided into eight 16bits segements.
• IPv6 is the next generation Internet Protocol designed as the next step of
the IP version 4.(It has 32 bits address)
• IPv6 was designed to enable high-performance and larger address space.(It
has 128 bits address)
• This was achieved by overcoming many of the weaknesses of
IPv4 protocol and by adding several new features.
• The IPv6 was developed due to the address depletion of IPv4.
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4. •The IPv6 was developed due
to the address depletion of
IPv4.
•The structure of IPv6 address
is fundamentally different than
that of IPv4.
•Therefor here is absolutely no
possibility of address depletion
taking place in future.
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IPV6 ADDRESSING
Figure 1 - IPv6 Address - 4 times longer than IPv4

5. IPV6 PACKET FORMAT
• Each packet can be divided into two parts viz header and payload.
• The payload is made up of two parts:
• 1. An optional extension headers and
• 2. The upper layer data.
• The base header is 40 byte long whereas the payload consisting of the
extension header and upper layer data can have information worth upto 65,
535 bytes.
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6. IPV6 PACKET FORMAT
• Version (VER)
• Priority
• Flow label
• Payload length
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7. IPV6 PACKET FORMAT
• Next header
• Hop limit
• Source address
• Destination address
• But this field will contain the address of the next router and not the final
destination if source routing is being used
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8. ADVANTAGES OF IPV6
1. Improved header format:
IPV6 uses an improved header format. In its header format the options are
separated from the base header.
These options are inserted when needed, between the base header and upper
layer data.
The routing process is simplified due to this modification.
The speed of the routing process increases and the routing time is reduced.
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9. ADVANTAGES OF IPV6
2. Larger address space:
IPv6 has 128-bit address, which is 4 times wider in bits is compared to IPv4's
32-bit address space So there is a large increase in the address space.
Address space of IPv6 = (2^128)
3. New options:
IPv6 has increased functionality due to the addition of entirely new options
that are absent in IPv4.
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10. ADVANTAGES OF IPV6
4. More security :
IPv6 includes security in the basic specification.
It includes encryption of packets (ESP: Encapsulated Security Payload) and
authentication of the sender of packets (AH: Authentication Header) for enhancing
the security.
5. Support to resource allocation :
To implement better support for real time traffic (such as video conference), IPv6
includes flow label in the specification.
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11. ADVANTAGES OF IPV6
With flow label mechanism, routers can recognize to which end-to-end flow
the given packet belongs to.
6. Plug and play :
IPv6 includes plug and play in the standard specification.
It therefore must be easier for novice users to connect their machines to the
network, it will be done automatically.
7. Clearer specification and optimization :
IPv6 follows good practices of IPv4 and omits flaws/obsolete items of IPv4.
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Thank you