Is ARP in the transport layer?

ARP is layer 2. The reason being is that a broadcast is sent on layer 2 (data link layer) and ARP will normally not traverse to layer 3 (network layer).

In which layer is ARP protocol used?

layer 2
Address Resolution Protocol (ARP) The Address Resolution Protocol is a layer 2 protocol used to map MAC addresses to IP addresses.

How does ARP work in Layer 3?

The Layer 3 switch places the information from the ARP response into the ARP cache. ARP requests contain the IP address and MAC address of the sender, so all devices that receive the request learn the MAC address and IP address of the sender and can update their own ARP caches accordingly.

Is ARP a layer 2 broadcast?

The ARP request is broadcast at layer-2 to all hosts on the LAN, looking for the host which owns the layer-3 address. The host owning that address will respond with an ARP reply, giving the requesting host its MAC address.

How does ARP work in Layer 2?

In layer 2, the communication happens mostly over the MAC address or physical address(MAC address is the permanent physical address of the computer). So how in the world would the source computer know the destination IP address or the MAC address associated with it? This is where ARP comes into the picture.

Is ARP UDP or TCP?

The ARP protocol is just one component of a TCP/IP or UDP/IP stack.

Is ARP layer 2 or Layer 3 protocol?

ARP works between Layers 2 and 3 of the Open Systems Interconnection model (OSI model). The MAC address exists on Layer 2 of the OSI model, the data link layer. The IP address exists on Layer 3, the network layer.

How does ARP work in layer 2?

Why does ARP work on layer 2 and not layer 3?

But ARP is a separate process with separate packets. You will find no ARP protocol information within an IP packet. This is the reason, why ARP is definitely not a layer 2.5 protocol. You may define layer 2.5 protocols in a sense that additional protocols are added between layer 2 (Ethernet) and layer 3 (IP).

Is broadcast layer 2 or 3?

Layer 2 broadcasts are sent to the broadcast mac address ffff:ffff:ffff if ethernet and so can be received by any device. Layer 3 broadcasts are sent to the broadcast network address, which for an ip network of 10.1.

How does ARP work in network layer?

ARP broadcasts a request packet to all the machines on the LAN and asks if any of the machines are using that particular IP address. When a machine recognizes the IP address as its own, it sends a reply so ARP can update the cache for future reference and proceed with the communication.