Cisco Systems began as a small startup in a San Francisco living room in 1984. Its founders were researchers at Stanford University who devised a "gateway server" to connect computers from different departments. At this time, Transmission Control Protocol (TCP)/IP was beginning to enter the networking community, and this husband and wife team (Len and Sandy Bosack) decided to take a chance and make a commercial version of their server. Cisco Systems'first generation of products were known as gateway servers, and the product line had four iterations:
Advanced Gateway Server (AGS)
Mid-Range Gateway Server (MGS)
Integrated Gateway Server (IGS)
Advanced Gateway Server Plus (AGS+)
These servers provided basic LAN-to-WAN ...