PART II Introduction to the Foundation of information Technologies Session 10-11 Telecommunication and networks
HUANG Lihua, Fudan University Session 10-11 Telecommunication and Networks PART Ⅱ Introduction to the Foundation of Information Technologies
Agenda 1. Telecommunications 2. Computer Networks and Enterprise network 3. Internet/Intranet/extranet 4. Wireless Computing
HUANG Lihua, Fudan University Feb., - July., 2005 Agenda 1. Telecommunications 2. Computer Networks and Enterprise Network 3. Internet/Intranet/Extranet 4. Wireless Computing
服务器 马马马早旱 工作站C 十楼 光缆一區 金融工程实验室 卫口 其它楼层都仿照十楼的 数台集线器,以提供足 够的信息点,对高带宽 的系统,例如:服务器 缆一 可以直接连接到交换机 缆一 集线器 五楼及机房 校园网 光纤 换机 双绞线 ATM WWW服务器 服务器 光缆一 其它楼层都仿照十楼的 光缆一m噩 数台集 够的信息点,对高带宽 的系统,例如:服务器 光缆— 可以直接连接到交换机 管理学院 旦旦 李达三楼 数据库、 NOTES服务 电网络结构 105、106香港班教室 HUANG LIhua, Fudan University
HUANG Lihua, Fudan University 主交换机 光缆 光缆 集线器 光纤 交换机 光 缆 光缆 金融工程实验室 五楼及机房 集 线 器 光缆 光缆 光缆 105、106香港班教室 校园网 ATM 双绞线 交换机 WWW服务器 数据库、NOTES服务 器 双绞线 双绞线 双绞线 交换机 服务器 服务器 说明 其它楼层都仿照十楼的 配置，由一台交换机联 数台集线器，以提供足 够的信息点，对高带宽 的系统，例如：服务器 光缆 可以直接连接到交换机 光缆 工作站/PC 说明 其它楼层都仿照十楼的 配置，由一台交换机联 数台集线器，以提供足 够的信息点，对高带宽 的系统，例如：服务器 可以直接连接到交换机 十楼 九楼 八楼 七楼 六楼 四楼 三楼 二楼 一楼 管理学院 李达三楼 网络结构
务织企业肉络系统 厘匚聞 公用电话网 服务器 备份服务器 磁盘阵 网络管理工作站 ■■■ 远程访问服务器 厂办工作站 (董事长、总经理、财务 外贸、销售、生产) 办公大楼工市為 岫(原料仓库、成品仓库、卡丝车间、缝 Hub 纫车间、定型车间、包装车间) (辅料仓库、国产及 圈机、太和兴车间) 北楼二作繼 南楼工作组 安全监视系统 安全监视系统
纺织企业网络系统 主服务器 HUB 磁盘阵 列 备份服务器 网络管理工作站 公用电话网 远程访问服务器 厂办工作站 办公大楼工作组 （董事长、总经理、财务 、 外贸 、销售、生产 ） Hub 南楼工作组 （原料仓库、成品仓库、卡丝车间、缝 纫车间、定型车间、包装车间 ) Hub 北楼工作组 （辅料仓库、国产及毛 圈机、太和兴车间） 安全监视系统 安全监视系统
Which Business tasks are Requiring telecommunications Network is Computer Network is System
HUANG Lihua, Fudan University Network is Computer. Network is System. Which Business Tasks are Requiring Telecommunications
TELECOMMUNICATIONS Communicating information Via electronic means over some distance Service provided by telecom companies telephone, mobile phone, wireless transmission data communication. Cable TV, satellite,…
HUANG Lihua, Fudan University TELECOMMUNICATIONS • Communicating information VIA electronic means over some distance • Service provided by telecom companies: telephone, mobile phone, wireless transmission, data communication, Cable TV, satellite, ………….. *
Telecommunication Concept Telecommunication is the electronic collection, exchange, and processing of data or information, including text, picture, voice, and other information that is digitally coded and intelligible to a variety of electronic machines omputer Computer Communicatio Communication Processor Processor Network Software
HUANG Lihua, Fudan University Telecommunication Concept • Telecommunication is the electronic collection, exchange, and processing of data or information, including text, picture, voice, and other information that is digitally coded and intelligible to a variety of electronic machines. Computer Communication Processor Communication Processor Computer Network Software
The Spectrum of Telecommunications-based Service Available POTS-plain old · Broadcast tv telephone service Communications Entertainment. High-definition TV Cellular/PCS systems Enhanced Pay-per-view Mobile radio Video-on-demand Video telephony Interactive TV Videoconferencing Interactive video games Telecommuting Video catalog shopping Internet access Distance learning Image networking Desktop multimedia Transaction service Information transactions
HUANG Lihua, Fudan University The Spectrum of Telecommunications-based Service Available • Broadcast TV • High-definition TV • Enhanced Pay-per-view • Video-on-demand • Interactive TV • Interactive video games • Video catalog shopping • Distance learning • Desktop multimedia • POTS-plain old telephone service • Cellular/PCS systems • Mobile radio • Video telephony • Videoconferencing • Telecommuting • Internet access • Image networking • Transaction service Communications Information transactions Entertainment
Electronic Signals Telecommunication media can carry two basic type of signals, ANALOG(模拟) and dIgital 数字) Analog signals are continuous waves that" carry information by altering the characteristics ( amplitude振幅 and frequency频率) of the wave Digital signals are discrete on-off pulses that convey information in terms of ls and Os, just like the cpu in computer 00101101911010010101011011000109000b11010010010 nalog data transmission Digital data transmission wave signal pulse signal)
HUANG Lihua, Fudan University Electronic Signals • Telecommunication media can carry two basic type of signals, ANALOG(模拟) and DIGITAL （数字）. • Analog signals are continuous waves that “carry” information by altering the characteristics ( amplitude振幅 and frequency频率) of the wave. • Digital signals are discrete on-off pulses that convey information in terms of 1s and 0s, just like the CPU in computer. 0 1 0 0 1 0 1 0 Analog data transmission (wave signal) Digital data transmission (pulse signal) 0010111010011101001010101110111100100010000101111010110100111010010010110010101101100
O Telecommunication System Computers Terminals(Input /Output Devices) Communications Channels(media) · Processors( Modems调制解调器; multiplexers(多 路转接器; Internetwork Processors) Host Network software Host Compute Computer Telecommunication media (channelS) PC or Multiplex Modem Front End Termina Modem k- Multiplex Processor Front end Receiver Processor
HUANG Lihua, Fudan University Telecommunication System • Computers • Terminals (Input / Output Devices) • Communications Channels (media) • Processors (Modems调制解调器; multiplexers(多 路转接器;Internetwork Processors) • Network software Host Computer PC or Terminal Multiplex Modem Modem Multiplex Front End Processor Host Computer Front End Processor Receiver Telecommunication media (channels)