Arp

Arp is a surname of German origin. Notable individuals include Hans Arp (also known as Jean Arp), a German-French painter and sculptor who was a leading figure in the Dada movement, and Sophie Taeuber-Arp, a Swiss artist and designer who collaborated with Arp and helped advance Dada and constructive art.

In computing, ARP stands for Address Resolution Protocol, a fundamental protocol in TCP/IP networks. It maps IP addresses to hardware (MAC) addresses on local networks by sending broadcast requests and processing replies. Devices maintain ARP caches to speed subsequent communications. IPv6 uses Neighbor Discovery instead of ARP, while ARP remains central to IPv4. ARP spoofing or poisoning is a common security concern, where an attacker sends falsified ARP messages to redirect traffic.

ARP Instruments, Inc. was a U.S. manufacturer of electronic musical instruments active during the 1970s and 1980s. The company produced notable synthesizers such as the ARP 2600 and the Odyssey, which influenced many genres of electronic music.

Geographically, Arp is also the name of a small city in Texas, United States.