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An optional feature of IPv6, the jumbo payload option in a Hop-By-Hop Options extension header, [8] allows the exchange of packets with payloads of up to one octet less than 4 GB (2 32 − 1 = 4 294 967 295 octets), by making use of a 32-bit length field. Packets with such payloads are called jumbograms.
The IPv4 header checksum is calculated for the IPv4 header, and has to be recalculated by routers every time the time to live (called hop limit in the IPv6 protocol) is reduced by one. The absence of a checksum in the IPv6 header furthers the end-to-end principle of Internet design, which envisioned that most processing in the network occurs in ...
This is a list of the IP protocol numbers found in the field Protocol of the IPv4 header and the Next Header field of the IPv6 header. It is an identifier for the encapsulated protocol and determines the layout of the data that immediately follows the header. Both fields are eight bits wide.
ICMPv6 provides a minimal level of message integrity verification by the inclusion of a 16-bit checksum in its header. The checksum is calculated starting with a pseudo-header of IPv6 header fields according to the IPv6 standard, [6] which consists of the source and destination addresses, the packet length and the next header field, the latter of which is set to the value 58.
In the IPv4 header, TTL is the 9th octet of 20. In the IPv6 header, it is the 8th octet of 40. The maximum TTL value is 255, the maximum value of a single octet. A recommended initial value is 64. [2] [3] The time-to-live value can be thought of as an upper bound on the time that an IP datagram can exist in an Internet system.
6LoWPAN (acronym of "IPv6 over Low-Power Wireless Personal Area Networks") [1] was a working group of the Internet Engineering Task Force (IETF). [2] It was created with the intention of applying the Internet Protocol (IP) even to the smallest devices, [3] enabling low-power devices with limited processing capabilities to participate in the Internet of Things.
With hop-by-hop transport, chunks of data are forwarded from node to node in a store-and-forward manner. As hop-by-hop transport involves not only the source and destination node, but rather some or all of the intermediate nodes as well, it allows data to be forwarded even if the path between source and destination is not permanently connected ...
An example of the fragmentation of a protocol data unit in a given layer into smaller fragments. IP fragmentation is an Internet Protocol (IP) process that breaks packets into smaller pieces (fragments), so that the resulting pieces can pass through a link with a smaller maximum transmission unit (MTU) than the original packet size.