How to remove network connections?

Question

Network administration

I opened network connections, and there from somewhere +11 created local connections appeared. Where did they come from and how to remove them?

Answer 1

Where did it come from:
Given the presence of the "VirtualBox Host-Only Network", most likely they added new networks to virtual machines every time they created a machine.
Delete through the virtualbox network manager or along with the virtual machine. I do not remember how virtualbox unfortunately.

Answer 2

if we talk about correct deletions, then there are two of them:
1) VM - fixing - merging - adapter 1 - dropping - (for example, change to NAT)
2) Uninstalling VirtualBox

Answer 3