The Listening section is the second part of the TOEFL-iBT test. you will have this section right after completing the Reading section. And just like it, it will be affected by the long format variable.
This section will usually take 41-57 minutes long. Depending on whether you get the short or long format in this section.
The best thing to do is to be prepared for the long format as we will only know which format we receive when we start the test.