Cisco training in IT, repair and programming is such a complex and potentially high-risk process that most people would prefer to work with someone who has reached an industry standard. Certifications are not from the state, but from a professional society, often nationally recognized. Because Cisco is such a large company, it has its own certification standard. This manufacturer of networking systems is also constantly improving its own technology.
This is why when you go in for exam certification, you don't just finish the assignment and finish your training. Training is ongoing because the technology moves fast and so certifications must be renewed periodically. Some certifications, such as 350-001, may only be valid for a specific period of time. In order to stay within a professional society's certified list, you may also have to show evidence of continued learning. Certifications are not recommendations, but are also affiliated with these organizations.
Certification standards change with the market and this is one of several reasons why the certification is not limited to one state or one company. It is an objective endorsement of your skills, making you responsible to your industry. This is the assurance you can give to your contacts. Sites like ExamTrace can help you to study for certification examinations. They are difficult but if you study well and know the material, you can pass!