hi :realy my company push me to be certified in lan wireless and i did not find any materials or courses that is enough to be wireless certified, could u help me plz.and tell me what courses and books i need to be certified.

hi:realy i need to specify the minimum bandwidth between two site connected by leased line 128k for video conferene and ip telephony, and i need to know the equipment needed for this design and the best routers to be in the two locations, realy i di...