There are many types of security cameras, for examples household used IP cameras, more advanced CCTVs with DVR.

Different cameras suit for different needs. If you are looking for to protect your more valuable belongings, I guess a more advanced CCTV system is better than a household used IP cameras.

在這世界上有不同種類的閉路電視，例如：在家用的 IP 攝像頭，又或者比較進階有中央視訊攝錄功能的CCTV。

不同種類的應用環境有些不同，例如如果你要套系統保護比較有價值的東西的時候，你就要需要一套進階系統了。