Question

Which ipv6 header field is known as the priority field?

Answer 1

$\fbox{\\\begin{minispace} \bf Traffic Class\\\end{minispace}}$ is known as the priority field of the IPv6 header field.

Further explanation:

The IPv6 is the recent used exchange internet protocol. It is the streamlines variant of IPv4 and removes the extra fields for better communication of network traffic.

Generally, the size of IPv6 header is 40 bytes. The various fields of IPv6 are as demonstrated below:

Upper Layer Protocol Data Unit: It contains the header of upper layer protocol and its payload. Upper layer protocol data unit is 65,535 bytes. If the length of payload is in excess of 65535 bytes, at that point payload is sent by Hop-by-Hop protocol header.

Extension headers: There may be any number of extensions headers in the IPv6 header and size is also variable. Each extension header denotes the next extension header. The last extension header represents the upper layer protocol data unit. The size of IPv6 extension headers has no limit.

The fields in the IPv6 are as below:

Version: The version of IP is 4 bits and put to 6 bits.

Traffic Class: Traffic class is known as priority field of the IPv6 header. The size of traffic field is 8 bits. It has the same functionality compare to IPv4 type service field. The default flow label is 0.

Flow Label: Flow label represents the sequence of packets from source to destination by using Ipv6 routers. The size of flow label is 20 bits. The source and destination can have multiple flows.

Payload length: The size of payload length is 16 bits.  

Next Header: The size of next header is 8 bits.

Hop Limit: The size of hop limit is 8 bits.

Source Address: The size of source address is 128 bits.

Destination Address: The size of destination address is 128 bits.

The below figure shows the  IPv6 and its different fields.

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Answer details:

Grade: College Engineering

Subject: Computer Science

Chapter: Computer Networks

Keywords:

IPv4, IPv6, header, priority, field, traffic class, protocol, data, extension header, payload, hop, source, destination, address, streamline

Answer 2

Traffic Class header field is known as the priority field.