To answer this question, we need to understand the different versions of SSL and their vulnerabilities.
SSL (Secure Sockets Layer) is a cryptographic protocol used to secure communication over the internet. Over the years, different versions of SSL have been developed, each with its own security features and vulnerabilities.
Option A) Version 1 - This option is incorrect because SSL version 1 was never publicly released due to security flaws.
Option B) Version 2 - This option is incorrect because SSL version 2 has several security vulnerabilities, including weaknesses in the encryption algorithms and the possibility of protocol downgrade attacks.
Option C) Version 3 - This option is correct because SSL version 3 is the latest version that is not vulnerable. However, it is important to note that SSL version 3 has its own vulnerabilities, such as the POODLE attack (Padding Oracle On Downgraded Legacy Encryption), which led to its deprecation.
Option D) Version 4 - This option is incorrect because there is no SSL version 4. The successor to SSL version 3 is TLS (Transport Layer Security), which is currently in its 1.3 version.
The correct answer is Option C) 3. This option is correct because SSL version 3 is the latest version that is not vulnerable, although it has its own vulnerabilities.