Overview of E- Business Technologies Irwan Sembiring

Categories of e-Business Technology 2 Network Gear & Services Outsourcers Web Applications Business Applications Security & Disaster Recovery Data Storage & Management

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5 Packet Switching TCP = TRANSMISSION CONTROL PROTOCOL (Breaks messages into packets and reassembles them) IP = INTERNET PROTOCOL (Moves packets around the Internet) SOURCE: J. DECEMBER

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ISDN 64 Kbps to 128 Kbps Integrated Services Digital Network (ISDN) provides high-speed access through a digital switching system, using two 64 Kbps data channels and one 15 Kbps signaling channel. The 64 Kbps channels can be used for either data or voice. The channels can be combined to deliver 128 Kbps data service. ISDN is a symmetrical service offering the same speed for sending data as for receiving data. ISDN is inherently more costly than a Digital Subscriber Line, because it requires additional digital switching equipment. The adaptation for digital switches to handle a substantial volume of data calls is quite expensive. Also, ISDN is limited to 128 Kbps, while xDSL has a wide variety of available bandwidths. 7

Digital Subscriber Line (DSL) 144 Kbps to 9 Mbps A technology using standard copper telephone lines to provide secure, reliable, high-speed Internet access. This is a general term for any local network loop that is digital in nature. DSL technology is available in several varieties. xDSL is the generic term for the suite of DSL services, where the "x" can be replaced with any of the letters that represent one of the various types of DSL technology (ADSL, HDSL, IDSL, MDSL, RADSL, SDSL, VDSL). 8

Microwave 256 Kbps to 1.5 Mbps A system offering data speeds of 256 Kbps to 1.5 Mbps. This can be a cost-saving alternative for remote locations, as installation does not require a telephone connection. Irwan Sembiring 9

T1 Up to Mbps A digital transmission link with a capacity of Mbps. T1 uses two pairs of normal twisted wires, the same as found in most residences. T1 is a standard for digital transmission in the United States. T1 lines are used to connect networks across remote distances. A fractional T1 can also be used to provide a portion of a full T1 connection – for example, one-half a T1 is 772 Kb Introduction (Henry C. Co) 10

Personal Satellite System Up to 2 Mbps download Under a one-way satellite system, an antenna (dish) receives signals from a satellite. The earth station then connects to a wireline system, cellular carrier or other carrier. Download speeds can reach 2 Mbps. Another system, such as T-1 or modem, can be used for uplink. Introduction (Henry C. Co) 11

Cable Modem Up to 4 Mbps Several cable companies have begun offering high- speed data access and phone service to subscribers. Data speeds vary due to neighborhood usage, but can be as high as 4 Mbps. Introduction (Henry C. Co) 12

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The router is a device which inter-connects networks in an heterogeneous environment. The router also serves as a routing switch-board. Routers connect two or more networks and forward data packets between them. When data arrives from one of the segments, the router decides, according to it's routing table, to which segment to forward that data. 14

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The load balancer distributes user requests to multiple servers based on traffic volume and server availability. Many of today's load-balancing products also provide content- based balancing, which allows Web administrators to match traffic to server power by designating a large, fast disk array for image content and a fast and secure server for Secure Sockets Layer (SSL) and electronic commerce transactions. Some load balancers can perform trickier maneuvers, such as isolating Common Gateway Interface requests and sending them to a separate server or prioritizing SSL traffic over HTML traffic. 16

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Switches These devices relay data between servers instantly. Where routers coordinate the flow of traffic into and out of your Web farm, the switch directs the flow of packets on the inside. 18

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See presentation on “Security”

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See presentation on “SCM, CRM, & ERP”

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