IPSec: Provides network-level security, safeguarding all data traversing the network regardless of the application. Ideal for scenarios where entire network segments or devices need to communicate securely.
Typically requires more complex configuration and management, especially in large-scale or dynamic environments.
TLS: Offers application-level security, targeting specific application communications. Best suited for securing individual sessions between applications, such as browsing, email, or file transfers.
Generally easier to implement for specific applications since it's often built into the application protocols themselves (e.g., HTTPS for web browsers).
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IPSec in tunnel mode creates a VPN, effectively extending the company's network to the remote user. This secures all traffic, regardless of the application. TLS, on the other hand, operates at the application layer (typically on top of TCP) and is specifically designed to secure communication between two applications, such as a web browser and a web server, making it ideal for e-commerce.
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A) While TLS is excellent for web traffic, it doesn't provide network-level security like a VPN. Using TLS for remote access wouldn't protect all network traffic.
B) Using IPSec in transport mode for remote access wouldn't be as effective as tunnel mode. Transport mode only secures the payload of IP packets, not the headers, and is less suitable for creating a full VPN.
D) While IPSec is powerful, it's not the ideal solution for securing individual web transactions. TLS is specifically designed for this purpose and is more efficient and widely supported in web browsers.