Static ARP Entries
Static ARP entry is a permanent IP-to-MAC binding in the ARP table (ARP cache). One reason that you may want to do this is if two nodes in the LAN are constantly communicating and never change their IP and MAC addresses.
Address Resolution Protocol (ARP) has been designed in times when network security has not been very developed. Therefore the protocol is clear text with no embedded security.
Address Resolution Protocol (ARP) is a very fundamental protocol in computer networking. When a PC wants to send a message over the network, it has to encapsulate the data down the layers of the OSI model.