If it's an Internet network, cisco certified is an authoritative certification.

Cisco certified is divided into CCNA, CCNP and CCIE.

CCNA is an entry-level certification in cisco certified. Cisco Network Engineer Certification.

Now, if you want to take the exam, CCNP is more practical.

Cisco's exams are all in English, but the requirements are not high. It is enough to have a basic knowledge of English.

If you want to do relevant training, I recommend you to come to Dalian Sichuang. A22-2, Carrefour Science and Technology Building, Xi 'an Road, is fully equipped. Come and see how it suits you when you have time. It's no use saying no matter how good it is. I hope it helps you.