ARP request is a layer 2 or layer three message and why?

Created Jan 09, 2019 18:46:33Latest reply Jan 10, 2019 06:54:15 186 3 0 0
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ARP request is a layer 2 or layer three message and why?

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Mohamed_Mostafa  Adept   Created Jan 09, 2019 19:38:03 Helpful(0) Helpful(0)

ARP works at layer 2, its not carried inside layer 3 header.
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https://www.cloudshark.org/captures/354dcd8979e3

ARP has always been a Layer 2 protocol. The reason: The highest layer addresses carried within ARP are Layer2 MAC addresses for typical ARP operation. The IP addresses in the ARP packets are protocol payload, no addressing information of the ARP packet itself.

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x
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Network & Security Engineer
chenhui  Admin   Created Jan 09, 2019 19:03:19 Helpful(0) Helpful(0)

@Diaa_Mohamed commonly, when talking about the network layer, we means OSI reference model, according to the OSI reference model, ARP request packet doesn't contain IP header, it should be considered working at layer 2
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Hamid_84102332     Created Jan 10, 2019 06:54:15 Helpful(0) Helpful(0)

ARP request is L2 as the sender has no specific destination and sends broadcast message to all the devices to get the destination MAC
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