IPv6 Header

   IPv6 Header:





IPv6 header contains the following things:

• Version - This field contains the version of the IP used in the packet. It is of 4-bit in IP version 6.
• Traffic class - This is an 8-bits field determining the packet priority. Priority values subdivide into ranges: traffic where the source provides congestion control and non-congestion control traffic.
• Flow label - This 20 bits specifies the QoS management. Originally created for giving real-time applications special service, but currently unused.
• Payload length - This 16 bits determines the payload length in bytes. When cleared to zero, the option is a "Jumbo payload" (hop-by-hop).
• Next header - This 8-bits field specifies the next encapsulated protocol. The values are compatible with those specified for the IPv4 protocol field.
• Hop limit - This is an 8-bits field newly introduced in IPv6. It replaces the time to live field of IPv4.
• Source Address - This 128 bits field determines the logical address of the host that is sending the packet.
• Destination Address - This 128 bits field determines the logical address of the host that is receiving the packet.