more real-time. But some packets may be lost due to network burst traffic and images will be obscure. If TCP protocol is selected, packet loss would not occur and video display will more accurate. But the real-time effect is worse than UDP protocol. If the network is protected by a firewall and it opens HTTP port (80) only, HTTP protocol must be selected. In this mode, audio will not be sent and you can see the video only. If you have no special needs and no idea to choose one among them, simply choose UDP. Generally the client will automatically try these protocols by the following order, UDP → TCP → HTTP. After the client connects to the Network Camera successfully, “Protocol Option” will show the working protocol. The chosen protocol will be recorded in the user's PC and used for next connection. If the network environment is changed or users want to let web browser detect again, select UDP manually to save and then return HOME to connect again.
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