Then result 1 is added to the network segment of clients to get the source address of offline detection packets. The operation AND is performed between this specified IP address and the wildcard mask to obtain result 1. This source address is calculated based on the client network segment and the IP address specified in the access-user arp-detect fallback command. When the device does not function as a gateway, it can send offline detection packets with the source address on the same network segment as clients.
