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 NetworkingOpen Systems Goals

• Connectivity

• Portability

• Interoperability

• Scalability

• Others?

Agenda

• Telecommunication terminology

• Communication media

• Network architecture concepts

• Enterprise networking

• Internet

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– E-mail– 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