I'm interviewing for a Technical Program Manager position in a network planning/data center design team . I would like to know if any of you have worked or are working with TPM's in this domain and what technical knowledge (in networking) do you expect them to have?

or what kind of technical stuff do they usually come across? I have a technical round with the company in which they will ask me basic networking stuff so just want to be sure about how to prepare for it.