Cisco’s career certifications program covers all areas of networking providing the aspirant engineer with the relavant, job-aligned skills and official stamp of ability on the resume.
Certifications at the associate level can help launch a new recruit into roles such as the network engineer and network administrator titles. A certification at the professional level will probably position the individual well in a senior network engineer or network manager position, and an expert-level certification would be something to aim for in pursuit of the most senior roles and recognition for networking talent, something similar to what an MBA or MSc might do for a business career.
Within each of the Cisco certification levels, there are concentrations and specializations, so it is important to study your options well, and think about the aspects of networking that stimulate you the most. Check out here for detailed overview of certifications, specializations and recommended trainings.