The first product the company marketed was called the Advanced Gateway Server (AGS). later Mid-Range Gateway Server (MSG), the Compact Gateway Server (CGS), the Integrated Gateway Server (IGS)and the AGS+. nterconnecting of Cisco Networking Devices. Exam: 640-821: Introduction to Cisco Networking Technologies. There are CCNP, CCIE, CCDA, CCDP, CCSP .
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