You will need to have an internet connection to have Xbox live. You can plug your xbox in with an ethernet.
Xbox Live requires an internet connection, either by wireless adapter or ethernet cable.
You can use the xbox 360 still but the adapter or an Ethernet cable enables you to get xbox live and play online
you will need an ethernet cable that you can get from electronics stores.
The adapter connects you to Xbox Live but only if you have a wireless network and if you have a Xbox Live subscription.
Search http://www.youtube.com for xbox without wireless adapter and you will see videos on how to do just that.
Use an ethernet cable and plug that in from your modem or a router then into your xbox 360
The Xbox 360 has no built in WiFi adapter. Without it, the system would have no way to connect to a router to play over Xbox Live, without using a cable. The router is required to access the internet.
What do you mean by adapter?
you buy the wireless adapter
yes unless you have the newest xbox 360 (black slimline), If not you have to use either an adapter or a ethernet cable
no you have to have a xbox adapter.
You need an Xbox wireless adapter.