10.20.30.40 and 192.168.1.10 are both private IP addresses, which are used for internal networks. Since both IP's are private addresses, its not really exfiltrating data. Line 2 and 3 is what you want to be looking at. The request is Length 15, but ABCDEFJHIJ is only 10 CHARs in length, but you can see the reply is giving additional information, based on the length.