Airport Problems

the airport on mac book air behaves in funny way sometimes. has problems connecting internet through routers. example, in home have 2 routers - although mba can connect both of them, can access internet through 1 of them. have no idea problem , doesn't occur other computers / laptops. also, if i'm @ friend's place problem occur. i'll able connect router won't able access internet.

sorry i'm not able express myself better i'm kinda uneducated in these matters.

possibly issue?

 

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