Deploying Cisco Voice over IP Solutions If you've got a wide area network (WAN) already, putting interoffice voice traffic on it is an obvious application for it. Voice signals take up so little bandwidth, and the cost savings can be so significant, that Voice over IP (VoIP) deserves serious consideration. However, you can easily throw away years of cost savings by bringing in... CCNA Exam Certification Guide (CCNA Exam 640-407) CCNA Exam Certification Guide is a comprehensive study tool for CCNA Exam #640-407. Written by a CCIE and Certified Cisco Systems Instructor and reviewed by Cisco technical experts, CCNA Exam Certification Guide helps you understand and master the exam objectives. Section-by-section objective lists keep you focused on the material...
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