A rotating proxy automatically changes the exit IP address your traffic uses — either on every request or after a set time. Instead of hammering a target from one address (a fast route to a block), your requests spread across a large pool of IPs, each carrying its own clean reputation. The opposite mode, sticky sessions, deliberately holds one IP when you need continuity.
Rotating gives a fresh IP frequently — ideal for wide crawls where each request is independent and you want to avoid rate limits on any single IP. Sticky holds one IP for a window (often a few minutes) — essential for multi-step flows like logging in, adding to cart, or paginating through results, where changing IPs mid-session looks suspicious or breaks the session.
Most modern residential networks control rotation through the proxy username rather than separate endpoints. On Roam:
-session-ab12cd and change it each request to rotate.-country-<cc> to rotate within a specific country.No API calls, no IP-list management — it's all in the username string.
Use rotation for scraping product catalogs, search results, or any large set of independent pages. Use sticky for account logins, checkout flows, form submissions, and anything where the server tracks a session. Many real jobs mix both: rotate to discover URLs, then stick an IP to work through a specific account or cart.
轮换 IP 就保证不被封吗？
粘性会话能持续多久？
轮换代理要多花钱吗？
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