# Revision history [back]

On what factors is the communication protocol selected ? be it TCP or UDP

Default is TCP (ie: reliable).

Unless user specifies the unreliable transport hint.

Are there some other protocols supported as well ?

No, not by default.

There are some alternative transports available, but you'd have to install those yourself (they're old, but see ethzasl_message_transport fi).

Note: this only answers the question in the context of ROS 1.

On what factors is the communication protocol selected ? be it TCP or UDP

Default is TCP (ie: reliable).

Unless user specifies the unreliable transport hint.

Are there some other protocols supported as well ?

No, not by default.

There are some alternative transports available, but you'd have to install those yourself (they're old, but see ethzasl_message_transport fi).