What happens to a client when a dhcp expires?

When a DHCP lease expires, the client loses its assigned IP address and must request a new lease from the DHCP server. If the client attempts to renew its lease before expiration, it can often retain its IP address if it's still available. If the lease has expired and the client cannot renew, it must go through the DHCP discovery process to obtain a new address, which may result in a different IP being assigned. During this time, the client may temporarily lose network connectivity.