Editing Network packet (section)

== Terminology ==
In the seven-layer [[OSI model]] of [[computer networking]], ''packet'' strictly refers to a [[protocol data unit]] at layer 3, the [[network layer]].<ref>{{Cite web|title=OSI Model|url=https://www.cloudflare.com/en-in/learning/ddos/glossary/open-systems-interconnection-model-osi/}}</ref> A data unit at layer 2, the [[data link layer]], is a ''[[Frame (networking)|frame]]''. In layer 4, the [[transport layer]], the data units are ''segments'' and ''datagrams''. Thus, in the example of TCP/IP communication over [[Ethernet]], a [[TCP segment]] is carried in one or more [[IP packet (disambiguation)|IP packets]],<!--intentional link to disambig, could be either IPv4 or IPv6 packet--> which are each carried in one or more [[Ethernet frame]]s.