A. एटीएम
B. एफडीडीआई
C. लैन
D. क्लाइंट सर्वर

Solution

D. Client Server

Explanation

<p>Call-Based Architecture refers to a setup where clients make requests (or "calls") to servers, which then process and respond.</p><p><br></p><p>This is the foundational concept of the Client-Server architecture.</p><p><br></p><p>It's widely used in networks and applications where multiple clients access shared resources hosted on a server.</p>