You posted in the support area for the AirPort Express, AirPort Extreme and Time Capsule.
These products: Compare Apple Wi-Fi base stations AirPort Express AirPort Extreme Time Capsule
I'm not sure how your question relates to one of these products. Can you provide more details?
If you are having trouble connecting your MacBook, you need to post in the MacBook support area, or contact your Internet Service Provider. The link for the MacBook support area is here: