Download Technology Guide 3

Technology Guide 4
Telecommunication & Internet
Agenda
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Telecommunication terminology
Communication media
Network architecture concepts
Enterprise networking
Internet
Telecommunication Terminology
• Telecommunication
• Data communication
• Components
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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
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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
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Cellular radio technology
Mobile computing
Personal communication system
Personal digital assistance
Agenda
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Telecommunication definition
Communication media
Network architecture concepts
Enterprise networking
Internet
Network Architecture Concepts
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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)
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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
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Interface card
Routers
Bridges
Gateways
Topology
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Ring
Bus
Star
Web
Hybrid
Types
• LAN
– Private branch exchange (PBX)
– Centrex
• MAN
• WAN
• VAN
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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
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Telecommunication terminology
Communication media
Network architecture concepts
Enterprise networking
Internet
Enterprise Networking - Types
• Client/server
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Distributed presentation
Remote presentation
Distributed logic
Remote data management
Distributed data management
Peer-to-peer
Intranet
Extranet
Internet
Enterprise Networking
Open Systems Goals
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Connectivity
Portability
Interoperability
Scalability
Others?
Agenda
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Telecommunication terminology
Communication media
Network architecture concepts
Enterprise networking
Internet
Internet
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Internet kiosks
Protocols: TCP/IP
Telnet
Internet Service provider (ISP)
World wide web (Web)
Browser
Web site/web page
Internet
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Search engines or metasearch engines
Uniform resource locator (URL)
Hypertext transfer protocol (http)
Usages
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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