CCDA

It is a starting to mid-level certification designed for IT professionals who can design running scared and switched network infrastructures containing LAN, WAN, and dial access services for various companies. It has as its requirement the understanding and abilities to set up, configure, and operate basic network infrastructures. One therefore needs to pass this one exam to attain CCDA certification and the CCDA is valid for three years. Basic functions of those pursuing this certification generally take account of network administrator, network infrastructure administrator, infrastructure engineer and network designer.

CCDP
This is a mid to advanced-level certification especially designed for IT professionals who can design routed and switched networks containing LAN, WAN, and dial access services, applying modular design practices and ensuring the complete resolution responds optimally to the business and technical needs and is premeditated to be highly on hand. It takes account of various prerequisites for example CCNA and CCDA.

CCIE

This is an advanced-level certification particularly designed for IT professionals who have the training, understanding, knowledge, experience, exposure and confidence to deal with the most competitive and challenging tasks in their fields. Getting hold of highly sophisticated Cisco certifications like CCNP, CCDP, CCIP, and CCSP will be absolutely desirable and advantageous before taking on the CCIE. It generally involves four important tracks like:
1. CCIE Service Provider
2. CCIE Routing and Switching
3. CCIE Security
4. CCIE Voice

CCIP

It is a mid-level certification for IT professionals who have a thorough knowledge as well as understanding of networking technologies in the service provider arena involving IP routing, IP QoS, BGP, and MPLS. Job roles of those pursuing this certification generally take account of network administrator, infrastructure administrator, infrastructure engineer, infrastructure specialist, and network engineer.

CCNA

It is an entry-level certification meant for network administrators and engineers. It is generally comprised of two forms: The CCNA Composite 640-802 and The Interconnecting Cisco Network Devices 1 and 2 (ICND1 and ICND2). Most of professionals and experts mull over CCNA to be the defacto Network Engineering exam that qualifies a user to drive a small to medium business network. It opens doors for new exams like the CCNP and CCDP certifications. Overall, it is a very compatible and also very challenging exam.

CCSP

This is an advanced-level certification designed for IT professionals who are keenly and dynamically involved in developing business solutions and designing and delivering compound levels of security departments. These individuals in general are answerable for designing and implementing Cisco secure networks. Job roles of those pursuing this certification generally take account of network security professional, systems security professional, and infrastructure security specialist.