Which of the following is not a common backup topology?

• A. LAN-Base
• B. LAN-Free
• C. Server-Free
• D. Server-Base

Answer: (D)

Backup topology describes how data moves from clients to storage and who coordinates the process. In practice you’ll see setups where the backup traffic goes over the LAN to a centralized backup server (LAN-based), where data is moved over a SAN directly to storage without using the LAN (LAN-free), and where no dedicated backup server is involved and data moves directly to storage or a backup appliance (server-free). The term you’re asking about isn’t a widely used category because it doesn’t describe a distinct, recognized mode of operation. A path labeled as server-base would essentially be a variation of the LAN-based model or simply fall under one of the other established topologies, rather than naming a separate approach. That’s why it’s not considered a common backup topology.