Answer:
Modify the name via local monitor:
Go to Menu>Camera>OSD>Camera Name;
Modify the name via IE explorer:
(1)Login the device via IE explorer;
(2)Go to Configuration>Image>OSD Settings>Camera Name;
Modify the name via iVMS-4200:
(1)Add the device to iVMS-4200 client;
(2)Go to Device Management>Selected Device>Remote Configuration>Image>Video Display>Camera Name.