Jumbo frames are commonly used in which type of network environment?

• A. SAN
• B. LAN
• C. WAN
• D. Internet

Answer: (A)

Jumbo frames increase the maximum transmission unit beyond the standard Ethernet size, typically to around 9 KB. This reduces the per-packet header overhead and lowers CPU interrupts, which boosts throughput for bulk data transfers. Such efficiency gains are most valuable in storage networks where large blocks of data are moved between servers and storage devices—exactly what SAN traffic does. In SAN environments, high bandwidth and low latency are important, and enabling jumbo frames helps maximize data transfer performance for block storage protocols like iSCSI. WANs and the Internet face diverse paths and MTU mismatches that make end-to-end jumbo frames unreliable, and while LANs can use them, the scenario that benefits most and is commonly implemented is storage-area networks.