How to use "connection" in a sentence

Maybe there's a connection."

A call came in on Sala's ultranet connection, and her heart jumped.

She was over an hour late for meeting him at the simulator center, and because her ultranet connection didn't come back on until she was almost there, she couldn't even call him or send him a message

She set off along the busy walkway, checking her ultranet connection as she went

Sala checked her ultranet connection for the millionth time

Elliot's mind raced through a list of cases that his law firm was currently handling, searching for some connection with these two intruders, but he couldn't think of one.

could the parietal spot have a direct connection with the frost somehow?"