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Cisco Systems, Inc. (NASDAQ:Â CSCO, SEHK: 4333) is a multinational corporation with 63,000 employees and annual revenue of US$35 billion as of 2007. Headquartered in San Jose, California, it designs and sells networking and communications technology and services under five brands, namely Cisco, Linksys, WebEx, IronPort, and Scientific Atlanta. Initially, Specials on used Cisco Equipment manufactured only enterprise multi-protocol routers but gradually diversified its product offering to move into the home user market with the purchase of Linksys while also expanding its offering for corporate customers.
Routers connect with two or more logical subnets, which do not necessarily map one-to-one to the physical interfaces of the router. The term layer 3 switch often is used interchangeably with router, but switch is really a marketing term without a rigorous technical definition. In marketing usage, it is generally optimized for Ethernet LAN interfaces and may not have other physical interface types.
The switch is referred to as a “gate” when abstracted to mathematical form. In the philosophy of logic, operational arguments are represented as logic gates. The use of electronic gates to function as a system of logical gates is the fundamental basis for the computer—i.e. a computer is a system of electronic switches which function as logical gates.
Voice over Internet Protocol (VoIP) is a protocol optimized for the transmission of voice through the Internet or other packet switched networks. VoIP is often used abstractly to refer to the actual transmission of voice (rather than the protocol implementing it). VoIP is also known as IP Telephony, Internet telephony, Broadband telephony, Broadband Phone and Voice over Broadband. “VoIP” is pronounced voyp.
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Filed under: Product Reviews, a product review Tagged: cisco products, cisco routers, cisco services, cisco switches, Cisco Systems, Ethernet LAN, layer 3 switch, Voice over Internet Protocol
