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

Created: Jan 9, 2019 10:46:33Latest reply: Jan 9, 2019 22:54:15 480 3 0 0
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ARP request is a layer 2 or layer three message and why?

  • x
  • convention:

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Mohamed_Mostafa
Created Jan 9, 2019 11:38:03 Helpful(0) Helpful(0)

ARP works at layer 2, its not carried inside layer 3 header.
1

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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chenhui
chenhui Admin Created Jan 9, 2019 11:03:19 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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Mohamed_Mostafa
Mohamed_Mostafa Created Jan 9, 2019 11:38:03 Helpful(0) Helpful(0)

ARP works at layer 2, its not carried inside layer 3 header.
1

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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This article contains more resources

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Hamid_84102332
Hamid_84102332 Created Jan 9, 2019 22:54:15 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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  • convention:

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