Final answer:
a. IPsec VPN is the best choice for corporate tech as it provides robust security for site-to-site connections and encompasses protocols for authentication and encryption.
Step-by-step explanation:
When researching and recommending the most appropriate VPN technology for corporate use, one must consider IPsec VPN and SSL/TLS VPN. IPsec VPN is typically used for site-to-site connections and can secure communications between routers or between routers and VPN gateways. It encompasses more than just the session layer and includes protocols for mutual authentication and establishment of cryptographic keys before it encrypts data at the packet level, offering a robust solution for a corporate tech environment.
On the other hand, SSL/TLS VPN is more often used for remote access over the internet. It provides secure transmission for web-based applications and is designed to work through browsers, which can be more convenient for users and easier to manage for admins. However, SSL/TLS VPN can be more susceptible to certain attacks and might not offer the same level of security for all traffic as IPsec VPN.
In a corporate setting where secure, reliable site-to-site connectivity is necessary, IPsec VPN might be the best choice. Its ability to operate at the network layer allows for comprehensive protection of data, making it well-suited for an organization's internal communication and resource access requirements.