計算機網(wǎng)絡(luò)第五版(英文版)-文庫吧資料
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【正文】 2) Source: David Lazer et al., “Computational Social Science”, SCIENCE, 323, 721724 (2022) Exploring Study (1) 1. Use plex work theory and dynamics of human behavior (DHB) to analyze social works and optimize social working service (SNS). 2. Research on opinion evolution and interference model on Inter, specially on social working service (SNS). Uses of Computer Networks (1) ? Computer Cluster A puter cluster consists of a set of loosely connected puters that work together so that in many respects they can be viewed as a single system. S e r v e r AS e r v e r BS t o r a g e F a r mFrom Wikipedia Uses of Computer Networks (2) ? Cloud Computing (1) From Wikipedia Infrastructure as a Service (IaaS) Platform as a Service (PaaS) Software as a Service (SaaS) Uses of Computer Networks (3) ? Cloud Computing (2) – Architecture From Wikipedia Uses of Computer Networks (4) ? Cloud Computing (3) – Deployment Models ? Private Cloud ? Community Cloud ? Public Cloud ? Hybrid Cloud Source: Wikipedia Uses of Computer Networks (5) ? Clientserver module – The Network maybe VPN which is over Inter – Provide many services over the work ? The Web is an example of clientserver puting. ? Emerce Request Reply Uses of Computer Networks (6) ? TriplePlay Networks (1) – 青海省公檢法信息通信網(wǎng)為例 – Icon ? Router Uses of Computer Networks (7) ? TriplePlay Networks (2) Switch Uses of Computer Networks (8) ? TriplePlay Networks (3) Uses of Computer Networks (9) ? PeertoPeer Networks – They are overlay works – There are no fixed clients and servers Uses of Computer Networks (10) ? The Category of Network Use (1) – Resource sharing – Persontoperson munication ? VoIP, video conference ? Desktop sharing ? Instant messaging, like Skype, MSN, , etc. ? Blog, Twitter ? Wiki, like Wikipedia, etc. – Emerce, includes online auctions – Entertainment, like MP3, IPTV, games, etc. Uses of Computer Networks (11) ? The Category of Network Use (2) – Ubiquitous puting (Ubip, 普適計算 ) / Ubiquitous works (Ubi, 泛在網(wǎng)絡(luò) ) ? Wireless Sensor works (WSN) ? Powerline works ? RFID (Radio Frequency IDentification) ? Inter of things (IOT, 物聯(lián)網(wǎng) ) Ubi IOT WSN Source: Wikipedia Source: 鄔賀銓 , 《 中國下一代互聯(lián)網(wǎng)的研究和 CNGI項目 》 , Uses of Computer Networks (12) ? Wireless Networks and Mobile Computing – WiFi, cellular works, WSN, etc. – Sensor works can be built with ZigBee, WiFi, etc. – Smart phones – GPS – Mmerce – Wearable puters Source: Wikipedia Network Hardware (1) ? Transmission technology – Pointtopoint links ? It is Important to find good route from the source to the destination. ? Unicasting – Broadcast links ? Broadcasting, multicasting S e r v e rP C P CS e r v e rS e r v e rS e r v e r Network Hardware (2) ? Networks can be classified by their scale Scale Type Vicinity PAN (Personal Area Network) Building/Campus LAN (Local Area Network) City MAN (Metropolitan Area Network) Country WAN (Wide Area Network) Pla The Inter (work of all works) Personal Area Network ? Connect devices over the range of a person ? PAN can be built with Bluetooth, ZigBee, or RFID Local Area Network ? Connect devices in a home or office building ? Called enterprise work in a pany ? How the sharing munication channel is allocated? Metropolitan Area Network ? Example MAN based on cable TV ? WiMAX Wide Area Network (1) ? Sub is collection of lines and routers ? The transmission line may own lines or lease SDH links ? Example WAN connecting three branch offices Tag router switch / Multiservice switch router (MSR) Wid
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