Forskel mellem versioner af "Address resolution protocol"

+ ==Lag placering i ISOs OSI-model==-afsnit
m (robot Tilføjer: yo:Address Resolution Protocol)
(+ ==Lag placering i ISOs OSI-model==-afsnit)
Protokollen [[Reverse address resolution protocol|RARP]] har den omvendte funktion.
==Lag placering i ISOs OSI-model==
Argumenter for at ARP er en ISO's OSI lag 2 protokol:<ref>[ TCP/IP Overview] Citat: "...[Se efter ARP, RARP i:] Figure 2 – Important Internet Protocols in Relation to the OSI Reference Model..."</ref><ref>[ ARP - Q&A] Citat: "...ARP belongs to the OSI data link layer (Layer 2). ARP protocol is implemented by the network protocol driver. ARP packets are encapsulated by Ethernet headers and transmitted...", hovedside: [ TCP/IP Protocol Suite - Questions & Answers] Citat: "...The following is a list of questions and answers (Q&A) documents relating to the various protocols in the TCP/IP protocol suite. The information in these documents is collected from various books, RFCs and other publicly available documents..."</ref>
:* ARP hører til ISO's OSI lag 2, fordi ARP-pakkers højeste (OSI) lag-adresser er (lag 2-switch-bare) lag 2-header-adresser (f.eks. [[Ethernetadresse|ethernet/mac/fysisk/hardware-adresse]]).
:* Der er ingen routbare lag 3-header-adresser (f.eks. IPv4-adresser). Med andre ord ARP-pakker har ingen lag3-header - ergo ingen lag 3 protokol.
:* På lag 2 ethernet har ARP protokolnummeret/typen 0x806. ARP har intet protokolnummer på lag 3 f.eks. IPv4.<ref>[ Does ARP Belong to :Layer 2 Or Layer 3 OSI Reference Model??? - TCP-IP] Citat: "...ARP is definetely a layer 2 protocol . With type = 0x806 [.] If anyone claims that ARP is on L3 , What is the protocol number for ARP ??..."</ref>
:* Evt. IPv4-adresser er indlejret i pakkens [[nyttelast]] (eng. ''payload'') - ikke i en routebar IPv4-header.