Because I have seen Cisco, Huawei is not clear, so I will talk about Cisco. Cisco's certification is divided into CCNA, CCNA, CCNP and CCIE, and the level is from bottom to top. CCIE is great. Huawei and Cisco have three similar certifications. If the gold content is higher, Cisco's is higher.
CCNA talks about the basic knowledge of network, while CCNP talks about various routing protocols, switching technologies and debugging. Now NP has been revised, and the new version has added voice and QOS, without debugging. CCIE is more in-depth than NP in content, mainly hands-on experiments. After all, learning these things is for use.
All the above are what network engineers need to know. Security engineers mainly focus on routing security and firewall technology. But if you learn security, routing and switching are the foundation. Whether it is a network engineer or a security engineer, if you are proficient, someone will want it. Now employers generally require NP. But the status quo is that NP is all over the street.
If you have time, energy and money, I suggest taking an ie exam. Now there are more IE interviews, so the pass rate is very low, and now it is more popular. IE is divided into several fields, such as routing switching, voice, security, etc., and only one direction is selected in the exam. As for training, generally every place has a special training institution. For example, there are many training institutions in Beijing, which you can find through Google. At that time, the training and accommodation cost about 6,000 yuan, and the total examination cost was 5,000 yuan (four times, once 1200).
If you really want to work in network, you must be familiar with routing technology, OSPF, how to handle packets, BGP, switching technology and HSRP.
If it is better to have a certificate than nothing in order to find a job, you can take CCNP.