Internet Bandwidth Management and Web Caching - apricot PDF
Preview Internet Bandwidth Management and Web Caching - apricot
Internet Bandwidth Management and Web Caching Gihan V. Dias ICT Agency of Sri Lanka ©2004 Gihan Dias Objectives to understand: • Why bandwidth should be managed • Principles of bandwidth management • Implementation of B/W management – at user layer – at network layer – at application layer APRICOT - 04/02/23 2 Intended Audience Technical personnel at: • Organisations with low / medium- speed Internet connections and many users • Small / medium ISPs with broadband and leased-line customers APRICOT - 04/02/23 3 Outline of Session - Morning • Importance of bandwidth mgmt. • Internet traffic characteristics – why bandwidth management works • Bandwidth management methods – restrict Internet usage – time shift traffic – managing multiple Internet connections APRICOT - 04/02/23 4 Outline (cont.) – Morning • Network-layer bandwidth mgmt. – QoS techniques – using QoS techniques for bandwidth management. APRICOT - 04/02/23 5 Outline (cont.) - Afternoon • What is caching and Squid? • Obtaining and Installing Squid • How Squid works • Configuring Squid • Bandwidth Management • Transparent Caching / Authentication • Cache Manager and Log files APRICOT - 04/02/23 6 Example Technologies • Network Layer: – Cisco IOS • Application Layer – Squid • The above are the most common (and used by us) – Other products have similar features APRICOT - 04/02/23 7 Bandwidth Management Internet Connections ISP ISP network network Backbone Bandwidth-limited links networks ISP network • Customers connect to an ISP • ISPs connect to backbone Customer Networks APRICOT - 04/02/23 9 Internet Connections (cont.) • Cost of connections is based on bandwidth – cost of connection is a major part of network cost – organisations only obtain as much bandwidth as they can afford – many organisations in Asia-Pacific only have 64kb/s – 2Mb/s connections APRICOT - 04/02/23 10
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