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Networking Trends

Networking Trends. Habib Youssef, Ph.D. youssef@ccse.kfupm.edu.sa Department of Computer Engineering King Fahd University of Petroleum and Minerals Dhahran, Saudi Arabia. Overview. Network Convergence Growth in Network Usage Application Trends Bandwidth Requirements Standardization

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Networking Trends

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  1. Networking Trends Habib Youssef, Ph.D. youssef@ccse.kfupm.edu.sa Department of Computer Engineering King Fahd University of Petroleum and Minerals Dhahran, Saudi Arabia Networking Trends/Habib Youssef

  2. Overview • Network Convergence • Growth in Network Usage • Application Trends • Bandwidth Requirements • Standardization • Result: Network Convergence • Converged Network Architecture • Consequences of Convergence • Policy Based Management Networking Trends/Habib Youssef

  3. Growth in Network Usage • World wide web has permanently changed networking. • Millions of individual users access the internet from home regularly • Home offices are on the increase • Businesses are using the Internet for commerce. • Increasingly, individual organizations are maintaining their own intranets Networking Trends/Habib Youssef

  4. Internet User Growth • World Wide Web Users in Millions Networking Trends/Habib Youssef 1995 1996 1997 1998 1999 2000

  5. Current Trends in Applications • Web pages now provide animated graphics, audio & video. • Ease of use is expected of applications. • Number of functions are expected from a single application (e.g., Web browsing, Mailing, Calendaring etc.). • Diverse data types are expected to be handled by a single application (e.g., Documents embedding spread sheets, graphics, voice etc.) Networking Trends/Habib Youssef

  6. Future Trends in Applications • Entertainment on demand • Movies, TV shows, Sports …. on demand • Video conferencing • Online publishing • Majority of books & other publications will be online • Electronic banking & cash • Electronic banking will displace checks & cash in commerce • Telecommuting • Employees will perform jobs from remote locations • Electronic sales • Goods & services will be sold by web • Distance learning Networking Trends/Habib Youssef

  7. Predicted Bandwidth Requirements Two-way MPEG/ Video Conferencing Internet Video Telecommuting WWW Internet/FTP Networking Trends/Habib Youssef

  8. Technology Trends • Devices capable of integrating a number of technologies are being designed and produced e.g. a single switch may interface ATM, FDDI, fast Ethernet. • Layer 2 and Layer 3 (IP switches) are being designed and produced. • To meet increased bandwidth needs and application sophistication new standards are being proposed. • Devices capable of prioritizing and filtering are becoming available. Networking Trends/Habib Youssef

  9. Technology Essential Technology characteristics to support future applications • Manageability • Policy responsive network, administrative partitioning • Scalability • Cost effective growth, bandwidth on demand, Usage & application based prioritization, multi vendor solutions • Reliability • Utility like uptime, self healing networks, embedded security enforcement • Next generation features & services • Advanced application functionality, ability to easily create new applications & services Networking Trends/Habib Youssef

  10. Standardization Efforts • Standards are necessary to maintain flexibility & to avoid the clutches of proprietary designs. Some forthcoming standards: • ITU: H323 • Supports packet switched networks to carry telephony traffic • IEEE: 802.1p, 802.1Q • Support prioritization of data traffic at layer 2, this enables QoS • IETF: RTP, ISLL, RTSP • Real-time Transport Protocol, Integrated Services over Specific Link Layers & Real-Time Streaming Protocol enable IP networks to carry multimedia traffic Networking Trends/Habib Youssef

  11. Case Example Why should the company pay for separate inter-branch telephone charges when the VPN could carry voice traffic? Leased Line / VPN Head Office Network Internet Leased Line/ VPN Leased Line/ VPN Branch Office Network Branch Office Network Networking Trends/Habib Youssef

  12. Result : Network Convergence Converged networking is an emerging technology thrust that integrates voice, video & data traffic over a single network Networking Trends/Habib Youssef

  13. Network Convergence Network Convergence entails convergence in various aspects e.g. • Payload Convergence • Different data types are carried in same communications format (e.g., layer 1 audio & video streams as well as layer 3 packets may be carried in layer3 datagrams ) • Protocol Convergence • The move is away from multi-protocols to a single protocol namely IP • Physical Convergence • All payloads travel over the same physical network (QoS & CoS may however be used to differentiate service requirements Networking Trends/Habib Youssef

  14. Network Convergence (Contd..) • Device Convergence • A single switch may support Ethernet packet forwarding, IP routing, ATM etc. • Application Convergence • A single application integrates formerly separate functions (e.g., Web pages allow interactive communication) • Technology Convergence • Same technology (e.g., ATM) is used for both LANs & WANs • Organizational Convergence • Centralization of networking, telecommunication & computing services under a single authority Networking Trends/Habib Youssef

  15. Converged Network Architecture • A large converged network will probably be composed of LANs and WANs • They will not be homogenous networks, due to: • Differing economic and performance requirements over LANs and WANs • Differing bandwidth, delay and jitter requirements • Two possible scenarios are presented. Networking Trends/Habib Youssef

  16. Converged Network Example 1 • Edge network: Switched or routed Ethernet • Core Network: ATM or Frame Relay etc. LAN Edge Network LAN Edge Network WAN core network Networking Trends/Habib Youssef

  17. Parallel core networks Traffic is filtered into different service classes at exit from LAN, and routed via different networks: Connection oriented ATM for multimedia traffic Packet switched WAN for bursty LAN traffic Converged Network Example 2 LAN Edge Network LAN Edge Network ATM Packet Switched WAN Networking Trends/Habib Youssef

  18. Summary Explosive increase in Transmission Bit Rates And Switching Capacities Abundant Computing power, DSP, Compression etc. Distributed operating systems, Middleware, Intelligent agents, Real time database systems. Deregulation/ Convergence Technology Globalization, Deregulation Increased competition, Partnerships Rapid introduction of Revenue generating services Evolution in Network And Services User Growth & Appl. Sophistication Anytime, Anywhere, Anymedia connectivity, transparency, Flexibility, manageability, Reliability Standardization Networking Trends/Habib Youssef

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