Wifi pigtails and connectors

These questions are about pigtails and connections for the microwave-capable cable.

I removed one pigtail from a old Linksys WRT54G WiFi router and another one was removed from the antenna.

I believe that the one from the router has a male connector and the one from the antenna has a female connector.

1. What size is the connector from the WiFi router? Is there a special name for it?

1. What size is the connector from the antenna? Is there a special name for it?

1. Is there a connector that connects directly to the back of the N-connector?

1. Is there an adapter that can downsize the router's connector to the connector from the antenna? Is there a special name for it (other then x-to-x adapter)?

1. Is there an adapter that can connect the N connector to the router antenna? Is there a special name for it (other then x-to-x adapter)?

1. The pigtail from the router looks to be unshielded. Is that OK? Could I hypothetically shield it by wrapping aluminum foil around it?

Thank you so much to everyone that took the time to read my post! Your responses are greatly appreciated!

here are larger versions of the pictures above

http://farm7.staticflickr.com/6042/6401145105_526c38799a_b.jpg
http://farm8.staticflickr.com/7158/6401145533_5c9c3bcc74_b.jpg
http://farm8.staticflickr.com/7007/6401145703_f50b05cf65_b.jpg