Which wireless antenna type is best suited for providing coverage over a wide area?

Which wireless antenna type is best suited for providing coverage in a specific area with minimal interference from other sources?

Which wireless security protocol is vulnerable to various attacks, including replay attacks and dictionary attacks?

Which wireless standard uses the 5 GHz frequency band and supports a maximum data rate of up to 6.9 Gbps using Orthogonal Frequency Division Multiplexing (OFDM) modulation?

Which wireless security protocol uses a pre-shared key for client authentication and provides weaker security features than its successor?