Which type of antenna is used in wireless communication?
A. Omnidirectional
B. Parabolic
C. Uni-directional
D. Bi-directional
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Definitely. But in case someone else comes across this, simply “directional” or “omnidirectional” are the terms you would see (not just on CEH but other security-related certs as well).
What a delightfully ambiguos question. All of these could be used for wireless communications.