Question at position 1 ARP protocol works at __________ layer.LinkPhysicalTransportNetwork

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Question at position 1 ARP protocol works at __________ layer.LinkPhysicalTransportNetwork

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Question restatement: ARP protocol works at __________ layer. Options are: Link, Physical, Transport, Network.

Option 1: 'Link' — This is the correct characterization. ARP operates to map IP addresses to MAC addresses within the local network segment and functions at the data-link layer (Layer 2) boundary, enabling communication on Ethernet networks without involving upper layers. Its behavior relies on the link-layer frame delivery mechanism, not on IP layers, which aligns with the purpose of the Link layer.

Option 2: 'Physical' — The physical layer (Layer 1) deals with raw electrical signals, bit transmission, and hardware specifics. ARP does not operate at this layer; it does not manage signaling or media access, so this choice is incorrect.

Option 3: 'Transport' — The transport layer (Layer 4) handles end-to-end communication, port numbers, and reliability (e.g., TCP, UDP). ARP has nothing to do with transport-layer responsibilities, so this option is incorrect.

Option 4: 'Network' — The network layer (Layer 3) concerns routing IP packets across networks. While ARP is used to enable IP addressing on a local link, the protocol itself is not a network-layer protocol; it serves a data-link-layer function for address resolution. Hence this choice is incorrect.

Question at position 1 ARP protocol works at __________ layer.LinkPhysicalTransportNetwork

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