http://www.articleheaven.net en-us editorial@articlealley.com In recent years, with the development of network technology, CCNA certification has become a global standard for many renowned IT companies. More and more training centers focus their training on CCNA and CCNP courses, usually with very expensive training... http://www.articleheaven.net/ccna-practice-test-870854.html 28th April 2009 Networking giant Cisco has unveiled new systems within its unified communications (UC) and TelePresence portfolios. Enhancements to the UC system include mobile access, improved video collaboration, and extended interoperability across applications and... http://www.articleheaven.net/new-cisco-telepresence-system-851073.html 09th April 2009