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Which IPSec protocol provides encryption?
ESP
AH
IKE
Encapsulating Security Payload (ESP) provides confidentiality, in addition to authentication, integrity, and anti-replay. ESP can be used alone, or in combination with AH (Authentication Header). ESP does not normally sign the entire packet unless it is being tunneled—ordinarily, just the IP data payload is protected, not the IP header. IPsec IKE (Internet Key Exchange) does not do encryption.
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