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Virtual Network Functions are known as the software implementations of network functions deployable on network functions virtualization infrastructure (NFVI) such as vFW, VLB, vPCRF, vIMS etc. The totality of all the hardware and software components that build the environment where VNFs are deployed is known as Network Functions Virtualization Infrastructure (NFVI). The NFV infrastructure can span several locations. The network that provides connectivity between these locations is the main part of NFV infrastructure.
You do not need to go for CCNA or CCNP if you are going for CCIE exam. You can register for CCIE written exam online and after18 months of passing the written exam you can go for CCIE lab exam. The registration have to be done a week before the date of the lab exam. As a network engineer you can start learning by choosing anyone of the following tracks for your career.
If you are going to start your career or you are an experienced network engineer you can start with anyone of the following available tracks.
- Routing and switching.
- Data center.
- Service provider.
You are recommended to go for Routing and Switching if you are at the starting level or you are an experienced engineer in networking field. Security track is recommended for security engineers. Almost all the tracks required above 80% marks for passing the exam.