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Lecture 10

IST 233 Lecture 10: IST 233 M001 Molta 2:20:17

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Information Studies
IST 233
David Molta

IST 233 M001 Molta 2202017 FCAPS: NetworkSecurity Framework o Fault: quickly fixing whats broken o Configuration: insuring that all hosts and internetwork devices are appropriately configured and updates o AccountingAuditing: Keeping track of usage, forensic analysis capabilities o Performance: monitoring application throughput, proactively planning for growth o Security: insuring that all devices and information is adequately secured based on risk analysis A fool with a tool is still a fool o HP argued that effective network management is mostly a managementprocess problem and only secondarily a technical problem that can be addresses with tools o Managers need to understand the pain points in their information systems and plan accordingly o Managers need to develop a strategy that explicitly addresses all elements of the network Management Timeframes o Management is a complex undertaking with many dimensions to consider. One key element is balancing your effort between short, medium and long term issues Strategic (35 timeframe): Choosing the right design, architecture, standards, vendors, policies and employees Tactical (budget year): Managing the implementation of currently budgeted projects Operational (day to day): Making the trains run on time, daytoday incident response o Managers need to be proactive not reactive Dashboard Metaphor o Provide the essential information you need in order to drive your network Network Performance Metrics o Speed: transmission speed in vits per second, the higher the better o Latency: time delay in packet delivery, measured in milliseconds (ms), the lower the better o Errors: percentage of incorrect bits or packets o Availability: percentage of time network is available to users Speed: A complex performance metric o RatedRaw speed vs throughput Raw speed overhead = throughput Throughput is always lower than raw speed o Shared vs dedicated bandwidth WiFi is shared, Ethernet is dedicated A sites Internet connection is shared o Individual vs aggregate throughput Speed of a single user with no contention Network Quality of Service (QoS) o High quality network service is a subjective judgement; QoS is an objective measure o Network QoS involves classification and prioritization of network traffic Some apps, like video, have throughput requirements Some apps, like VoIP, have strict latency requirements Common QoS metrics: Speedthroughput
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