ARP stands for Address Resolution Protocol.

ARP Commands. This chapter describes the commands used to configure and monitor the Address Resolution Protocol (ARP) on Cisco ASR 9000 Series Aggregation Services routers . arp command manipulates the System’s ARP cache. The primary function of this protocol is to resolve the IP address of a system to its mac address, and hence it works between level 2(Data link layer) and level 3(Network layer). Syntax. Using the arp command allows you to display and modify the Address Resolution Protocol (ARP) cache.
Right-click on the Start icon and select Command Prompt. Press the keyboard combination WinKey + R, then type cmd at the Run window that appears.
Each time a computer’s TCP/IP stack uses ARP to determine the Media Access Control (MAC) address for an IP address, it records the mapping in the ARP cache so that future ARP lookups go faster. For detailed information about ARP concepts, configuration tasks, and examples, see the Cisco ASR 9000 Series Aggregation Services Router IP Addresses and Services Configuration Guide. The three common ways to launch the Command Prompt window are: Search for cmd using the built-in Windows search tool. ARP command can display and modify the IP-to-Physical address translation tables used by address resolution protocol. To display the arp cache tables for all interfaces, type: arp /a To display the arp cache table for the interface that is assigned the IP address 10.0.0.99, type: arp /a /n 10.0.0.99 Display and modify the IP-to-Physical address translation tables used by address resolution protocol. It also allows a complete dump of the ARP cache. An ARP cache is a simple mapping of IP addresses to MAC addresses. To create permanent static arp cache entries, place the appropriate arp commands in a batch file and use Scheduled Tasks to run the batch file at startup. Examples. Arp is an external command accessed through the C:\Windows or C:\Winnt\System32 directory, and is available for the following Microsoft operating systems as arp…

View the contents of the local ARP cache table ARP-a [inet_addr] [-N if_addr] [-v] Add a static Arp entry for frequent accessed hosts ARP-s inet_addr eth_addr [if_addr] Delete an entry ARP-d inet_addr [if_addr] Key