[롱폴링] 본문 번역 - line3 (#1659)

Author: rlarjsdn3

5-network/10-long-polling/article.md

@@ -1,6 +1,6 @@
 # Long polling
 
-Long polling is the simplest way of having persistent connection with server, that doesn't use any specific protocol like WebSocket or Server Side Events.
+폴링(long polling)을 사용하면 웹소켓이나 server-sent event 같은 특정한 프로토콜을 사용하지 않아도 아주 간단히 서버와 지속적인 커넥션을 유지할 수 있습니다.
 
 Being very easy to implement, it's also good enough in a lot of cases.