Lecture Basic network management: Chapter 12 - Trung tâm Athena

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Bài giảng Basic network management, chương 12 giới thiệu các mô hình mạng WAN. Trong chương này người học có thể biết được các kết nối WAN như leased line, ADSL, PSTN. Mời các bạn cùng tham khảo để biết thêm các nội dung chi tiết.

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Nội dung Text: Lecture Basic network management: Chapter 12 - Trung tâm Athena

Chapter 12: Wan Overview  Objective • WAN Transmission Technology • Leased Line • ADSL • PSTN ATHENA
Introduction  In order to take advantage of WAN services, local networks and individual users must select a method for gaining access  Service providers offer a wide range of WAN access options  Each designed to meet a specific set of transmission needs in an efficient and cost effective manner ATHENA
WAN Overview  WANs connect remote sites.  Connection requirements vary depending on user requirements, cost, and availability. ATHENA
WAN Technology  Leased line  Frame Relay  ISDN (integrated services digital network)  ADSL ATHENA
Leased Line ATHENA
Leased Line  Provider assigns connection parameters to subscriber. ATHENA
What is “DSL”? • A family of access technologies that utilize high transmission frequencies (up to 1 MHz) to convert ordinary phone lines into highspeed data conduits ATHENA
ADSL “Consumer DSL” • Designed to coexist with POTS, unlike most other DSL types • “Slow” upstream for lowdatarate requests • “Fast” downstream for bursts of rich graphics and multimedia content • ATHENA
ADSL and POTS A Key Feature of ADSL Is CoExistence with POTS Customer Premise Central Office • Permits transmission of both signals on the same wire pair • Offloads data circuit from the voice switch • “POTS Splitter” at the CO separates analog POTS from data • “Microfilters” at the customer premise prevent offhook interference between analog voice signal and ADSL signal ATHENA
ADSL Access Small Branch Headquarters Office Cisco 6x00 (DSLAM) Serial ADSL WAN ATHENA 10
PSTN ATHENA
Summary  Wide area network  Leased line  ADSL  PSTN ATHENA