MS-721 Practice Question 3314
Exam: MS-721
Domain: Plan and design collaboration communications systems
Difficulty: hard
When designing an on-premises Session Border Controller (SBC) architecture for Direct Routing, which Transport Layer Security (TLS) cipher suite requirement is mandatory for the SIP signaling interface?
Answer Options
A
TLS 1.2 with mutual authentication (mTLS) and approved cipher suites
B
Unencrypted cleartext HTTP on port 80
C
SSL 3.0 with RC4 encryption
D
Telnet session on port 23
Correct Answer
A: TLS 1.2 with mutual authentication (mTLS) and approved cipher suites
Explanation
Microsoft Direct Routing requires TLS 1.2 with mutual authentication (mTLS) and supports specific cipher suites such as TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 or TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256.