300-720 · Question #23
When email authentication is configured on Cisco ESA, which two key types should be selected on the signing profile? (Choose two.)
The correct answer is A. DKIM C. Domain Keys. Cisco ESA supports two email authentication signing standards in its signing profiles: (1) DKIM (DomainKeys Identified Mail) - the modern, widely adopted standard that uses asymmetric cryptography to sign outgoing messages with a private key, with the public key published in…
Question
When email authentication is configured on Cisco ESA, which two key types should be selected on the signing profile? (Choose two.)
Options
- ADKIM
- BPublic Keys
- CDomain Keys
- DSymmetric Keys
- EPrivate Keys
How the community answered
(36 responses)- A94% (34)
- D3% (1)
- E3% (1)
Explanation
Cisco ESA supports two email authentication signing standards in its signing profiles: (1) DKIM (DomainKeys Identified Mail) - the modern, widely adopted standard that uses asymmetric cryptography to sign outgoing messages with a private key, with the public key published in DNS for verification; and (2) Domain Keys - the predecessor to DKIM, developed by Yahoo, also supported for legacy compatibility. Both are selectable signing methods in the ESA signing profile. 'Public Keys' and 'Private Keys' are key components used within DKIM/DomainKeys but are not profile type selections. 'Symmetric Keys' are not used in email authentication signing - asymmetric (public/private) key pairs are required.
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