Connectors are the network components through which Jetty accepts incoming network connections.
Each connector listens on a network port and can be configured with ConnectionFactory components that understand one or more network protocols.
Understanding a protocol means that the connector is able to interpret incoming network bytes (for example, the bytes that represent an HTTP/1.1 request) and convert them into more abstract objects (for example an HttpServletRequest object) that are then processed by applications.
Conversely, an abstract object (for example an HttpServletResponse) is converted into the correspondent outgoing network bytes (the bytes that represent an HTTP/1.1 response).
Like other Jetty components, connectors are enabled and configured by enabling and configuring the correspondent Jetty module.
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Important
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Recall that you must always issue the commands to enable Jetty modules from within the $JETTY_BASE directory, and that the Jetty module configuration files are in the $JETTY_BASE/start.d/ directory.
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You can obtain the list of connector-related modules in this way:
$ java -jar $JETTY_HOME/start.jar --list-modules=connector