What is the most cost-effective method to connect two corporate networks after a merger without using leased lines?

Using a site-to-site VPN to connect two corporate networks after a merger is indeed the most cost-effective method, particularly when compared to the alternatives presented. A site-to-site VPN leverages the existing internet infrastructure to create a secure and encrypted connection between the two networks, allowing them to communicate as if they were part of the same network while maintaining data privacy and integrity.

Establishing a site-to-site VPN is generally less expensive than dedicated leased lines, point-to-point T1 lines, or direct private connections, all of which involve significant installation and ongoing costs. Leased lines and T1 connections require dedicated physical infrastructure, which can be costly in terms of both installation and monthly fees, making them less suitable for a cost-sensitive scenario such as a merger. In contrast, a site-to-site VPN can be implemented relatively quickly and with minimal expense, and it does not require specialized hardware or cabling.

In summary, a site-to-site VPN effectively provides a secure and economical solution for integrating networks after a merger, making it the most beneficial choice in this context.