AMTI 5 Networking: Discovery, Communication, Collaboration Antonius Rachmat C
Problem • Organisasi semakin besar, data-data semakin besar, cabang semakin banyak, karyawan semakin banyak, pesaing dan customer semakin banyak • Dibutuhkan integrasi antar mereka yang mampu melintasi berbagai daerah, platform, dan teknologi • Solusi: networking systems, desktop, web, dan mobile based • Dibutuhkan juga netwoked device
Networked Devices • Networked devices are devices that communicate with a network. • Technologies include: laptops, PDAs, cell and smartphones, wikis, intranets, and extranets, GPSs, POS terminals, and RFID which allow information to be rapidly collected, processed, shared, and acted upon for competitive survival and advantage taking. • Feature-rich wireless devices make collaboration easier and more productive which indicates a more integrated, always-connected business environment and lifestyle.
iPhone, BlackBerry, Android
Local Area Network (LAN) • LAN consists of the following components: – LAN file server is a repository of various software and data files for the network – Nodes are the client machines on the LAN – Wired or wireless communication media that connects the devices
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Local Area Network (Continued) • LAN network interface card (NIC) is a special adapter that links an individual device to the communication medium and specifies: – The rate of data transmission; – The size of the message units; – Addressing information attached to each message – The network topology
• Network operating system (NOS) manages the server and routes and manages communications on the network. 6
Network Operating System
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Wide Area Network (WAN) • Wide area networks (WANs) are networks that cover large geographic areas. – WANs typically connect multiple LANs – WANs have large capacity and combine multiple channels (fiber optic, satellite, microwave, etc.) – WANs are provided by common carriers, such as telephone companies (Sprint, AT&T, etc.)
Going Wireless • Wifi - simple wireless networks • WLAN - expanding the wireless connection • WiMax - Long-range wireless
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What is Wi-Fi? • Short for wireless fidelity. • It is a wireless technology that uses radio frequency to transmit data through the air. • Wi-Fi is based on the 802.11 standard: – 802.11a – 802.11b – 802.11g
• 802.16 - WIMAX
Wi-Fi Alliance • Non-profit standards organization. • Global organization that created the Wi-Fi brand name. • Formerly the Wireless Ethernet Compatibility Alliance. • Logo:
Konsorsium WiFi • Beberapa perusahaan yang tergabung pada konsorsium WiFi
802.11 Standard • 802.11 is primarily concerned with the lower layers of the OSI model. • Data Link Layer – Logical Link Control (LLC). – Medium Access Control (MAC).
• Physical Layer – Physical Layer Convergence Procedure (PLCP). – Physical Medium Dependent (PMD).
Perbedaan WIFI
Spesifikasi
Kecepatan
Frekuensi
Transfer data
802.11b
11 Mb/s
2,4GHz
5 Mbit/s
802.11a
54 Mb/s
5 GHz
40 Mbit/s
802.11g/turbo
54/108 Mb/s
2,4 GHz
20 Mbit/s
802.11n
100 Mb/s
2,4 GHz
54 Mbit/s
Bluetooth and WiFi Intelligence Revolution
is the trade name for the popular wireless technology used in home networks, mobile phones, video games and more.
Bluetooth • Bluetooth adalah sebuah teknologi komunikasi wireless (tanpa kabel) yang beroperasi dalam pita frekuensi 2,4 GHz • Menyediakan layanan komunikasi data dan suara secara real-time antara host-host Bluetooth dengan jarak jangkauan layanan yang terbatas. • Application Area: – Data and voice access points – Cable replacement – Ad hoc networking
Bluetooth class
Sistem utama bluetooth • sebuah radio transceiver, • baseband link management, – Baseband (processor core, SRAM, UART, PCM USB) Interface, flash, dan voice codec
• Fungsional baseband: – Baseband link controller: menghubungkan perangkat keras radio ke baseband processing dan layer protokol fisik. – Link manager: melakukan aktivitas-aktivitas protokol tingkat tinggi seperti melakukan link setup, autentikasi dan konfigurasi.
Bluetooth Layer
Bluetooth Profile
Voice Communication • Examples of Internet telephony (VoIP)
The Network Computing Infrastructure
Chapter 4
Framework for IT support of Communication
Chapter 4
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Finding Information
Chapter 4
Search Engine
Search Engines Google Yahoo Ask.com Bing Aol
Metasearch Engines iBoogie Metacrawler Mamma Dogpile Metasearch Engine: sends user requests to several other search engines and/or databases and aggregates the results into a single list or displays them according to their source
Web 2.0 examples • • • • • •
RSS delivery of content Blogs – Web logs + comments Wikis – content created in community Instant Messaging + SMS, Voice over IP – Ex: Skype Podcasting
Folksonomy / Tagging • Folksonomi merupakan hasil pengategorian oleh pengguna. • Secara demokratis pengguna menerapkan tag sesuai dengan kecocokan mereka terhadap isi materi. • Folksonomi mengatasi kerumitan konsep kategori yang terstruktur formal dan bertingkat yang disebut taksonomi. • Kelemahan folksonomi misalnya tidak luput dari derau (noise), bisa terjadi ada banyak tag/label yang kosakatanya salah, tidak semua user tag/label tersebut cocok
Tagging
THE 1% RULE applications get better the more people use them
1% Contribute 10% Comment
100% Consume
Fitur Web 2.0 • Search – The ease of finding information through keyword search.
• Links – Link guides to other relevant information.
• Authoring – being the creation of a few to being constantly updated. – In wikis, the content is iterative in the sense that users undo and redo each other's work. – In blogs, content is cumulative in that posts and comments of individuals are accumulated over time.
Fitur Web 2.0 • Tags – Categorization of content by creating tags: simple, one-word user-determined descriptions to facilitate searching and avoid rigid, pre-made categories.
• Extensions – Powerful algorithms that leverage the Web as an application platform as well as a document server.
• Signals – The use of RSS technology to rapidly notify users of content changes.
Collaboration…. Collaboration refers to efforts of two or more entities (individuals, teams, groups or organizations) who work together to accomplish certain tasks. – Work group – Virtual group (team)
• Groupware: e-Groupware • Tele conferencing/Teleseminar: Adobe Acrobat Connect • Video conference : YM, Skype, Netmeeting • Web conferencing:Microsoft Office Live Meeting, Soho • Real time collaboration tool: Google Wave
Social Networking
Social Web / Network • Identitas: siapakah Anda? • Reputasi: apa pendapat orang tentang Anda? – Karma?
• Keberadaan: dimanakah Anda? • Hubungan: Anda terhubung dengan siapa? Siapa yang Anda percaya? – Social graph / friends
• Kelompok: bagaimana Anda mengorganisasikan hubungan? – Clique
• Percakapan: apa yang Anda diskusikan? – Komentar-komentar
• Berbagi: content apa yang Anda sediakan bagi yang lain untuk beriteraksi? – Status
Social Networking Shrinks the World • Social networking via mobile phones is shrinking the world to the size of a small screen. • Micro-blogging is the sending of messages up to 140-160 characters. • With more than 3 billion mobile handsets in use in the world (1 for every 2 people on the planet) a powerful force for changes in business and collaboration as well as politics and societies have emerged. • News media, universities, public safety, and other organizations are using the technology to deliver information to a wide audience quickly.
Adv & Disadv of Mobile Social Network • Advantages – More Coverage – Mobility – Save time:upload a photo to Flickr in this two- or three-minute gap while waiting for a bus – Other capabilities: GPS
• Disadvantages – – – –
text input speed (Qwerty? 2 vs 10 fingers) Screen size (Qvga, be very aware of image rendering speeds) Bandwidth & cost (be aware of download) No yet standards
Social Network Service
Wiki System
http://en.wikipedia.org/wiki/List_of_wiki_software
Wikis: what for? • Wikipedia • Documentation • Collaboration -> flexible, simple freeform project management • Intranet or extranet based • Great for unstructured content, can be structured with categories, tags, data trackers
Why use a wiki? • • • • • •
Easy to learn – no HTML required Easy way to share knowledge Easy way to collaborate Ability to revert back to old versions Ability to track who’s done what & where Collaboration among friends and/or colleagues
Wiki features • Use a standard web-browser • Shared, editable • Wysiwyg + wiki syntax for simple links and formatting • Powerful revision control: Every single change is tracked. Who/what/when + ability to show the difference • Email notification of changes (opt-in)
NEXT • E-Business & E-Commerce
