CCIE has a large market demand for routing switching and a large number of candidates. Zero-based off-the-job training generally lasts 5-8 months.

CCIE security is a little more difficult, the number of examinees is small, the market demand is not as big as that of routing exchange, but the development prospect is good, and the off-job training is about 5- 10 month.

The top three training institutions in China, Wolf, Yahweh and Internet China, have high pass rate and good quality.