First of all, HCIE certification exam is more difficult, the scope of the exam is very broad, including digital communications, data centers, security, wireless and other aspects of the exam time is also relatively long, usually requires candidates to complete within 8 hours. Moreover, the topics of HCIE exams are more complex and in-depth compared to HCIP exams, which require candidates to have deeper theoretical knowledge and practical experience to be able to cope with the exams. Secondly, HCIE certification exam involves a very wide range of knowledge, the exam content includes theoretical knowledge and practical operation, requiring candidates to have a certain mastery of various technical areas, such as IP network design, routing protocols, security technology, network optimization, etc., the exam is more difficult than HCIP certification. Finally, the exam time is relatively tight, candidates need to complete a series of exam questions within the specified time, including multiple choice questions, design questions, experimental questions and other parts, which requires candidates to have a high degree of professionalism and practical experience to be able to complete the exam.