Option C is not visible but here is the answer:
ChromeOS devices, particularly when managing certificates via the Google Admin console for trusted CAs (e.g., for TLS/SSL inspection or internal services), primarily support:
PEM (.pem, .crt, .cer): This is a Base64 encoded ASCII format, very common.
DER (.der, .cer): This is a binary encoding of the certificate.
PKCS#7 / P7B (.p7b, .p7c): This format can contain a certificate or a chain of certificates, often used for distributing CA chains.
The format that is generally incompatible or problematic, especially for uploading CA certificates (certificates you want devices to trust) via the Admin Console, is:
PKCS#12 (.p12, .pfx)
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jaxclain
1 month ago