complex technical questions in difference fields of the networking technologies like mpls, bgp, ospf, switching, I wouldn't say it's an easy one, they also focus on your english language so make sure you're well prepared

Unfortunately the passing based on years of experience in the field exceeding 5 years at least, besides your level of knowledge and certifications.I called the interviewer after a while asking about feedback.He told me they chose another guy with more technical background and experience although I think I performed in interview very well.