Kali Linux shows IP was connected [Closed]


I'm new to the unix world, and a couple of days ago I started by getting Kali Linux on my pc in dual boot and started doing some stuff with the help of a friend.

So today I wanted to try alone and at a certain point a typed the command "ls," and it was showing the IP was connected the other day.

Can someone please explain me why? And how to remove it if possible?

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