Objectively speaking, for those who have not been exposed to this knowledge before, the exam is still very difficult. It is recommended that you have more than 3 years of data communication experience and have been trained by relevant Huawei institutions before the exam, so that you can have confidence. All aspects of the exam should also be carefully prepared. I know a colleague who specializes in data communication in Huawei. Working for more than two years, I am very familiar with switches and routers all day. As a result, he failed the first time and made up the exam. I may have started to be careless. This certificate is similar to Cisco's ccna in gold content, but the examination registration and training costs are higher than Cisco's, and hcda is more practical than ccna in Huawei Datacom products used by almost all operators in China. Although Cisco started as a router.