Which security mechanism provides encryption for data over radio waves in wireless networks?

Which security mechanism provides encryption for data over radio waves in wireless networks?

• A. PKI
• B. WEP
• C. H.323
• D. SIP

Answer: (B)

In wireless networks, data travels as radio waves, so protecting it means encrypting the frames as they travel through the air. WEP, short for Wired Equivalent Privacy, was designed to provide that protection for 802.11 wireless links by encrypting the payloads with a shared key using RC4 and an initialization vector. PKI, by contrast, deals with certificates and public‑key encryption for authentication and broader communication security, not the specific mechanism that secures wireless frames. H.323 and SIP are signaling protocols for multimedia and VoIP, not methods for encrypting wireless data by default. So the option that provides encryption for data over radio waves in wireless networks is WEP.

In wireless networks, data travels as radio waves, so protecting it means encrypting the frames as they travel through the air. WEP, short for Wired Equivalent Privacy, was designed to provide that protection for 802.11 wireless links by encrypting the payloads with a shared key using RC4 and an initialization vector. PKI, by contrast, deals with certificates and public‑key encryption for authentication and broader communication security, not the specific mechanism that secures wireless frames. H.323 and SIP are signaling protocols for multimedia and VoIP, not methods for encrypting wireless data by default. So the option that provides encryption for data over radio waves in wireless networks is WEP.