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System Design Quiz Practice
Active Recall Drill Session
← Exit Session
Question 1 of 1
medium
System Design
Why do real-time systems implement a fallback ladder (WebSocket → long polling → short polling) instead of only supporting WebSocket?
A
WebSocket is deprecated and shouldn't be used at all
B
Some environments (corporate proxies, older infrastructure) block or poorly support WebSocket connections, so a fallback preserves a degraded-but-functional experience instead of a total feature loss
C
Long polling is always faster than WebSocket
D
This ladder is purely historical and no longer relevant
Check Answer