The Lippis Report Issue 44: Secure Domains

November 12th, 2004

To understand secure domains, it is helpful to think of virtual LANs or VLANs. The first time I remember hearing about VLANs was in the early 90s, when I took a meeting in my Massachusetts offices with Charlie Giancarlo, while he was at a company called Network Equipment Technologies (NET). Charlie was trying to describe how ATM switches could emulate Ethernet broadcast domains and to that end used the term VLANs. I remember the light bulb going off in my head when Charlie, struggling to define an emulated LAN, said this is not an emulated LAN but more like a ?¢‚Ǩ?ìVirtual" LAN. All the Ethernet switch vendors, such as UB, Synoptics, Cabletron, Kalpna, Synernetics, Crescendo/Cisco, Alantech were using the term VLANs to describe a technique to create, modify and in essence manage broadcast domains.
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The Lippis Report Issue 43: Trusted LANs Emerge

November 3rd, 2004

Local Area Network or LAN changes have ebbed and flowed on a nearly consistent five-year basis. In 1990 the worldwide $100M plus 10Mbs shared Ethernet market was emerging as the LAN standard. It was only five years later that the introduction of 100 Mbs fast Ethernet and the introduction of Ethernet switching usurped 10Mbs shared Ethernet. Between 1995 and 2000 two
very important introductions were made to switched LANs: virtual local area networking (VLANs) and 1 Gbs Ethernet. Now with every new generation of LANs, the market has grown by billions of dollars. The transition from shared to switched LANs was explosive, growing a $5.2B market in 1995 to over $14B in 2000. Part of this nearly triple market expansion was due to the transition from switched LANs to VLANs. The period between 2000 and 2003 showed flat to negative growth, due mostly to the global economic slump, but the LAN market is about to make another fundamental transition from VLANs to ?¢‚Ǩ?ìTrusted LANs", which will grow this market again by billions of dollars. The key value proposition of Trusted LANs is the provisioning of secure internal networks or LANs at high speeds independent of whether transport is wireless or wired. In short, Trusted LANs will be the new organizing principal for LANs.
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