What is IPv6 packet format?

An IPv6 packet has three parts: an IPv6 basic header, one or more IPv6 extension headers, and an upper-layer protocol data unit (PDU). An upper-layer PDU is composed of the upper-layer protocol header and its payload, which maybe an ICMPv6 packet, a TCP packet, or a UDP packet.

Which are valid IPv6 packet sections?

The fixed header starts an IPv6 packet and has a size of 40 octets (320 bits). The constant 6 (bit sequence 0110). The remaining two bits are used for Explicit Congestion Notification (ECN); priority values subdivide into ranges: traffic where the source provides congestion control and non-congestion control traffic.

Which is the correct format for an IPv6 header?

IPv6 does not include a Header Length field because the IPv6 header is always a fixed length of 40 bytes. Each extension header is either a fixed length or indicates its own length. Replaced by the IPv6 Traffic Class field. Replaced by the IPv6 Payload Length field, which indicates only the size of the payload.

Can IPv6 packets be fragmented?

Unlike IPv4, because intermediate nodes cannot fragment IPv6 fragments, it is essential that the source node either send a packet that is the same as or smaller than the maximum transmission unit (MTU) size for the network path or break packets into fragments that are the same size or smaller than the MTU size for the …

Which is a part of the IPv6 header format?

IPv6 Header Format Component, the data packet of IPv6 encompasses two main parts i.e. header and the payload. The IPv6 consists of 40 bytes long fixed header which contains the following fields. Source: Google Images. Let’s see the significance of the individual components of IPv6 Header in details-.

Where are IPv6 options located in a packet?

IPv6 options are placed in separate extension headers that are located between the IPv6 header and the transport-layer header in a packet. Most IPv6 extension headers are not examined or processed by any router along a packet’s delivery path until the packet arrives at its final destination.

What is the payload length of an IPv6 packet?

Payload Length: 16 bits long. This field indicates the length of the IPv6 payload in bytes. The payload is the part of the IPv6 packet following the IPv6 basic header, including the extension header and upper-layer PDU. This field has a maximum value of 65535.

How many fields are there in an IPv6 address?

Each “grouping” (from here on called fields) of hexadecimal digits is 16 bits, with a total of eight fields. The hexadecimal values of an IPv6 address are not case-sensitive. We can drop any leading zeros in each field of an IPv6 address. For example, consider the following address: 1423:0021:0C13:CC1E:3142:0001:2222:3333