What is 2 way audio IP camera? Do outdoor cameras have audio? What is the best home surveillance system?

Two-way audio is when your security camera lets you both hear what's happening in a room (or outside) and talk through the camera yourself.
Two-Way Voice: Today's best outdoor security cameras can capture exceptionally clear audio, they have echo cancellation and other advanced 
Surveillance Software can keep eye on your home, office, parking area, or anywhere you have an IP camera.
View video from multiple cameras simultaneously. What ip camera software is the best?

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Best Outdoor Security Cameras of 2020 | The Top Outdoor Cameras

These smart outdoor security cams can withstand the elements to keep your ... has a speaker as well and offers two-way audio communication that allows you to  ...

In cloud solutions, a significant part of the cost is the cost of traffic and servers for encoding and decoding video streams, as well as for ai-analysis.

For P2P technologies, encoding and decoding on servers is not required. The server only connects cameras and remote devices.

The video stream is transmitted directly through peer-to-peer connections, bypassing the cloud service.

Web Camera Pro - p2p video surveillance with artificial intelligence.