A security engineer deploys a certificate from a command CA to the RADIUS server for use with the EAP-TLS wireless network. Authentication is failing, so the engineer examines the certificates properties:

Issuer: (A commercial CA)

Valid from: (yesterdays date)

Valid to: (one year from yesterdays date)

Subject: CN=smithco.com

Public key: RSA (2040 bits)

Enhanced key usage: Client authentication (1.3.6.1.5.7.3.2)

Key usage: Digital signature, key encipherment (a0)

Which of the following is the MOST likely cause of the failure?

1. The certificate is missing the proper OID.
2. The certificate is missing wireless authentication in key usage.
3. The certificate is self-signed.
4. The certificate has expired.