The Address Resolution Protocol (ARP) is a low-level protocol located in the TCP/IP protocol stack, responsible for resolving an IP address to its corresponding MAC address. The symptoms of an ARP attack or ARP spoofing malware infection manifest as follows: when using a local area network (LAN), there will be a sudden disconnection, and after some time, the connection will return to normal. For example, the client status frequently turns red, users experience repeated disconnections, and the IE browser frequently encounters errors.