* The ncclient library is used for NETCONF communication with network devices.
* To retrieve interface information, you need to use the get operation.
* The get operation allows you to retrieve configuration and operational data from the device.
* In the context of the question, the engineer is creating a Python script to retrieve interface information.
* The correct expression to complete the highlighted section is intf_config, which represents the configuration data for the specified interface.
References:
* Automating Cisco Enterprise Solutions Official Cert Guide
Automating Cisco Enterprise Solutions Official Cert Guide