Add a password.
Nowadays virtually any wireless router. When you get a router you usually have about 4 lan ports (switch) and wireless router in the same box.
That depends on what you are attempting to do. If you are trying to access the internet, then no, a wireless router is not needed.
A Wireless router is a device that performs the functions of a router but also includes the functions of a wireless access point and a network switch.
A wireless USB adapter allows a computer or wireless device to connect to a wireless router. It is needed for any device which is not wired to an internet connection, to connect.
A wireless router, is a device that not only performs the functions of a router but also acts as a wireless access point. Wireless clients connect to the wireless router to access a common network, the router also often provides access to the internet.
an access point device is one of 2 things. a router, or wireless router connection usb device. with the usb device, you can connect an office computer wirelessly to a wireless router. in the situation of a laptop, it is always the router itself. some routers will require an access code to use.
The device you are referring to is a router.
The WEP key is the encryption code for your wireless router. It is sometimes written on your router itself, but will be stored on your computer so it can access the router itself. If you do not have a wireless router, then you are actually seeing someone else's wireless hotspot. If it is not a public one, then it's not something you are allowed to use - the WEP security is exactly there to keep unauthorised people off the network.
a wireless router
The WEP key is the code used to access a wireless router. You just use the same one your own PC or laptop uses to connect to your wireless router - if you do not own a wireless router, then the connections your DS shows belong to other people, they're passcoded so unauthorised people can't access it.
The WEP key is the same one your PC or laptop uses to access your wireless router. If you don't have a wireless router, then you're looking at someone else's, the WEP key is actually there to stop unauthorised people like you from accessing it.