Being familiar with a wide range of terminology used in your profession, knowing the functions it performs, and what issues they create in the operations of the IT infrastructure is crucial for anybody at the senior level. You need to be aware of these terms, and you also need to coach your team on them and communicate them clearly and efficiently to non-technical business users. You're likely to be asked many questions about these during the interview for a senior technical support engineer role. The best way to prepare for this is to review the terminology used in your profession before the interview.