People give based on the reputation of the institution therefore these past contacts and networks may or may not be of any real use. It is a red-flag to me when I am asked about previous donors and networks. It is a violation of professional ethics to solicit donors from a previous position.
Donors belong to the institution not the development professional.
A better question would to ask what is your knowledge of the giving community. Although non-profits are in competition for dollars, development professionals are NOT sales people. We don't work on commission.
I would suggest that the non-profit expecting a new employee to bring in his/her own contacts does not fully understand how to develop and expand their donor base and my be in need of
education on the subject.