Port 2105 Open on Network

After a long time of worrying about my network being secure and finally understanding the basic job of the ports I would see open. I recently noticed port 2103 Zephyr-clt and port 2105 eklogin open on my daughters computer. I asked her if she was "Instant Messaging" as that seemed like what the ports were for, but she said no. It was near midnight but I did not think she would fib about it? She did just add a printer that day. Can anyone tell me why these would suddenly appear open?