The devices include anything on your network, like Macs, PCs, iPhones, iPads, and routers. This will give you a list of devices, as shown below: You can do so by searching Spotlight, using Siri, or going into your Applications folder. Translation: If you need the IP or MAC address for a device on the same network as you, use ARP.įirst, we’ll need to open Terminal. Find Network Devices with ARPĪRP, or Address Resolution Protocol, is a communication protocol that’s used for exploring the link layer address associated with a network layer address. It will show IP addresses and MAC addresses, and is useful for troubleshooting and other situations. It get's better, depending on your hardware, you may not even be on an IP network that is based on Ethernet ATM for example.There’s a Terminal command called arp that lets you find network devices on your local area network (LAN).
You can use ARP, but will only get the MAC address of the first hop. Too bad that most situations with HTTP, which builds on TCP/IP, you are 99.99% never in the same network segment as your user. Here you can only talk to the switch via Ethernet. With a switch in the network a network segment is only cable that connects you to the switch. If you have good old BNC or a hub you have one network segment with all uses. On wire based networks, this depends on the hardware.
Every user on the network can talk via Ethernet to every other user. An entire wireless network is a network segment. So the question is, what is a network segment? It depends on the technology you use, but here are the common cases. But this works as expected only if you are on the same network segment. You can use ARP to get a MAC address for an IP address. It is used to identify for which user on the network segment a packet is.
The MAC address is a unique address of the network card. Here is a short refresher on Ethernet and IP.
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