300-720 · Question #138
300-720 Question #138: Real Exam Question with Answer & Explanation
The correct answer is D: Sender Policy Framework. SPF and SIDF are methods for verifying authenticity of email based on DNS records. SPF and SIDF allow the owner of an Internet domain to use a special format of DNS TXT records to specify which machines are authorized to transmit email for that domain. 0/user_guide/b_ESA_Admin_Gu
Question
An administrator needs to configure a Cisco ESA to verify that a specific mail server is authorized to send emails for a domain. To reduce overhead, the administrator does not want SSL type encryption or decryption to be used in this process. What must be configured on the Cisco ESA to meet this requirement?
Options
- ADomainKeys Identified Mail
- BPKI signing keys
- CAsymmetric keys
- DSender Policy Framework
Explanation
SPF and SIDF are methods for verifying authenticity of email based on DNS records. SPF and SIDF allow the owner of an Internet domain to use a special format of DNS TXT records to specify which machines are authorized to transmit email for that domain. 0/user_guide/b_ESA_Admin_Guide_14- 0/b_ESA_Admin_Guide_12_1_chapter_010110.html?bookSearch=true#con_1148397
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