Mesh is an architecture for multipoint where every participant sends and receives its media to all other participants.

A mesh is a very common technique that is used in WebRTC to build multipoint conferences. It can usually scale to 4-6 participants for video sessions at most.

Advantages of mesh architecture

• Simple to implement in WebRTC
• Requires very little backend infrastructure, keeping the resulting service cheap to operate

Disadvantages of mesh architecture

• Can’t scale to a large number of participants
• Requires a lot of uplink bandwidth from the participants

Other multipoint architectures are routing and mixing.