L3

• IPv4 Packet

• IPv6 Packet

  • Header

• Protocol

• DB

IPv4 Packet

https://en.wikipedia.org/wiki/Internet_Protocol_version_4

IPv6 Packet

https://en.wikipedia.org/wiki/IPv6

• An IPv6 packet has two parts: a header and payload.

Header

Extension headers: The IPv6 packet header has a minimum size of 40 octets (320 bits). Options are implemented as extensions.

Protocol

https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml

• IPv4[RFC791]: "Protocol" field, 8 bit

• IPv6[RFC8200]: "Next Header" field

DB

v4/v6 ASN/Country/API: https://networksdb.io/