Based on the latest evolving job market in recent times, CISCO technologies has upgraded and their associate level certification that is CCNA Voice, CCNA Wireless, CCNA Security and CCDA certifications requires you to only hold a CCNA certification and that is the only pre-requisite according to the new updated change for the new certification that come under CCNA .As we all know that The Cisco Certified Network Associate (CCNA) voice certification is for all those who aim to core knowledge and skills in administration of voice networks and secured voice networks services in organizations and involves implementing Cisco IOS Unified Communications, and the skills also include Voice Engineer Voice Manager, Voice Administrator. Upon completion of the CCNA Voice certification, you will be able to work on various VoIP technologies such as IP Telephony, Handset, Call Control, Voicemail Solutions, IP PBX etc.
You will be required to clear 640-461 Exam successfully to gain the certification. The Validity remains three years.