IntroductionXYZ Company This is a fictitious case example of XYZ company, that shows how a company might build a corporate network from scratch utilizing the internet.(Basically benefits of the internet)
Function of Telecommunication Visualization1. Transmitting at the whopping speed of terabit over fiber optic cable.2. Twisted pair phone line coming into business as straw at a operating speed DSL. Competitive Local Exchange Carrier’s (CLEC’s)CLEC’s bring new connection system in 1990’s; such as cable modem, optical fiber, wireless, satellite and faster wire line.
Internet & Telecommunication Internet actually started its journey in 1990’s by US Department of Defense for their ARPANET Because of constant technological change managers can’t concentrate on their strategy In late 90’s the page of internet became slower, so managers get much time to use internet on their operation
Internet’s Attributes Ubiquity (everywhere at once) Reliability ScalabilityThis norms makes todays life end to end IP network
XYZ Company XYZ Company which makes and sells widgets in the process of installing a corporate network. CTO has to make a lots of decision That’s why he wants to introduce the Internet has a heart of XYZ’s corporate operations
Network Options An intranet for use by employees An extranet for use by suppliers and some large customers The Internet as the all important central public networkHe also creates computer based system where clients and employees make a request from other computers which responded by server computers
Serving remote users Every PC will be outfitted with a network interface card (NIC) that lets it talk to the network. XYZ has four choices of communications wiring: i.Twisted pair(the standard telephone line) ii.Coaxial Cable (like cable TV) iii.Fiber optic(glass fiber that carries signals via light pulse, backbone networks) iv. Wireless
Serving remote users(Contd.) For employees working from computers in their homes, who need to transmit larger and larger files such as PowerPoint and presentation, the CTO could choose, DSL Modems Cable Modems
Serving remote users(Contd.) Finally they decide to connect these remote users to the corporate network and provide the speed and security they need. They have company supplied laptops and PDAs.
Serving local users In the office, all the computers and telephones will be connected directly to an always on LAN. The various LANs in XYZ’s offices will use three types of computers to route traffic: i. Hubs are repeaters ii. Switcher are smarter iii. Routers are smarter
Other’s network CTO wants to introduce Ethernet for sharing videos and multimedia with employees at a specific time in greater speed. LAN is always connected with Intranet which is protected from outside Firewall It means “ A server lets email but doesn’t permit access to application code” It is only accessible by the employees with their given protected password and ID.
Intranet –Communicating betweenoffices To help XYZ employees communicate between sites using WAN, the CTO set up a high speed asynchronous transfer mode (ATM)-up to 622mbps. ATM is used by telephone companies for their network backbones. However, due to the high cost of ATM long distance bandwidth, the CTO might not be able to afford it.
Intranet –Communicating betweenoffices (contd.) Gigabit Ethernet which operates at speed of 1gbps (10⁹bit per second), it has been outselling ATM because it is less costly.
Network Advantages Communication Shared peripherals Shared data Flexible access Control of user access rights Centralized administration Simultaneous access to the Internet