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key part of network monitoring. But real network monitoring also includes monitoring the health of applications and the hardware on which they run. Traditional network monitoring relies on tools like Netflow, Syslog collection, and the Simple Network Management Protocol (SNMP) to gauge the health of monitored systems. Multicloud solutions use many of these same tools. Monitoring Netflow helps to ensure that traffic is properly flowing between systems, whereas Syslog helps to measure the health of the applications themselves. You use SNMP to check on the health of the underlying hardware. With these three components, you can effectively measure the health of the systems and ensure that your infrastructure is operating efficiently. There is one more dimension of network monitoring that is required for multicloud architecture: performance monitoring. To gain a full picture of the health of your web application, you need to know how it is responding to real queries from all over the world and across cloud providers. Performance monitoring allows organi‐ zations to test web applications and measure performance from spe‐ cific locations. This type of monitoring can also alert you to network activity that other types of network monitoring cannot, such as potential distributed denial of service (DDoS) attacks or possible BGP hijacking incidents. Combining performance monitoring with Netflow, Syslog, and SNMP monitoring gives teams a complete picture of the perfor‐ mance of web applications and enables organizations to be more confident about web application functionality. Network monitoring is only part of the monitoring equation, though. Security monitoring is also necessary to ensure the health of multicloud environments. Security Monitoring, Logging, and Notification Having all the layers of security in place only improves the security of your multicloud infrastructure if alerts are being addressed prop‐ erly and in a timely manner. Target famously ignored early alerts of its much-reported 2013 data breach, which wound up costing the company hundreds of millions of dollars. Target is not alone. Com‐ Security Monitoring, Logging, and Notification | 35

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