That desctiption of "ALFA antenna" isn't definite, but from the pictures I see, yes you should be able to connect to a router with external antenna connections.
You might be able to use an outdoor antenna. It would depend on the router you have. High quality cable between the antenna and router can be expensive.
You might be able to use an outdoor antenna. It would depend on the router you have. High quality cable between the antenna and router can be expensive.
That desctiption of "ALFA antenna" isn't definite, but from the pictures I see, yes you should be able to connect to a router with external antenna connections.