Technology Guide 4 Telecommunication & Internet

Agenda Telecommunication terminology Communication media Network architecture concepts Enterprise networking Internet

Telecommunication Terminology Telecommunication Data communication Components –Hardware –Media –Software –Protocols –Providers

Telecommunication Terminology Signals –Analog: amplitude & frequency –Digital Modem Multiplexer –Frequency division, time division, statistical time division, wavelength division Front-end process Concentrator

Agenda Telecommunication terminology Communication media Network architecture concepts Enterprise networking Internet

Communication Media Cable media Wireless media

Cable media Types –Twisted-pair wire –Coaxial cable –Fiber optics Pros & Cons

Wireless media Types –Microwave –Satellite Geostationary earth orbit (22,300) Medium earth orbit (6,000) Low earth orbit (400 – 1,000) –Radio –Infrared Pros & cons

Wireless media Applications –Cellular radio technology –Mobile computing –Personal communication system –Personal digital assistance

Agenda Telecommunication definition Communication media Network architecture concepts Enterprise networking Internet

Network Architecture Concepts Transmission characteristics Protocols Open system interconnection (OSI) Interface Topology Types

Transmission characteristics Speed –Bits per second (bps) –Baud rate (Hertz) Direction –Simplex –Half-duplex –Full-duplex Mode –Asynchronous –Synchronous Accuracy –Horizontal –Vertical –Cyclic redundancy checking

Protocols Definition –Rules & procedures for transmission Protocol types –Token passing –Carrier sense multiple access/collision detection –Transmission control protocol/internet protocol (TCP/IP)

Open system interconnection (OSI) Physical layer Data link layer Network layer Transport layer Session layer Presentation layer Application layer

Interface Transmission interfaces –Parallel data transfer –Serial data transfer –Universal asynchronous receiver/transmitter Network interfaces –Interface card –Routers –Bridges –Gateways

Topology Ring Bus Star Web Hybrid

Types LAN –Private branch exchange (PBX) –Centrex MAN WAN VAN –Packet switching –Frame relay –Asynchronous transfer mode (ATM) –Integrated services digital network (ISDN) –Digital subscriber line (DSL) –Fiber distributed data interface Virtual private network (VPN) Backbone

Agenda Telecommunication terminology Communication media Network architecture concepts Enterprise networking Internet

Enterprise Networking - Types Client/server –Distributed presentation –Remote presentation –Distributed logic –Remote data management –Distributed data management Peer-to-peer Intranet Extranet Internet

Enterprise Networking Open Systems Goals Connectivity Portability Interoperability Scalability Others?

Agenda Telecommunication terminology Communication media Network architecture concepts Enterprise networking Internet

Internet kiosks Protocols: TCP/IP Telnet Internet Service provider (ISP) World wide web (Web) Browser Web site/web page

Internet Search engines or metasearch engines Uniform resource locator (URL) Hypertext transfer protocol (http) Usages –Research – –Chat program –Newsgroup –Electronic bulletin boards (EBBs) –E-commerce

Points to Remember Telecommunication terminology Communication media Network architecture concepts Enterprise networking Internet

Discussion Questions Why does an organization need a reliable network? What are the general selection criteria for a network? What kind networks are useful to an university such as CSUS? What kind networks are needed by a company such as Intel?

Assignment Review technology guides 1-2 & 4 and chapters 1-5 Read chapter 6 Group assignment Research paper