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What advanced network monitoring techniques do experienced system administrators recommend?

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Network monitoring is a vital skill for any system administrator who wants to ensure optimal performance, security, and reliability of their network infrastructure. However, network monitoring can also be challenging, especially when dealing with complex, dynamic, and heterogeneous environments. That's why experienced system administrators use advanced techniques to collect, analyze, and troubleshoot network data. In this article, we'll share some of these techniques and how they can help you improve your network monitoring skills.

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José Quintino Costa

Microsoft MVP | MCT | Azure Solutions Architect | Azure Administrator | Azure Security Engineer

1 Packet Capture and Analysis

One of the most powerful tools for network monitoring is packet capture and analysis. Packet capture allows you to capture the raw data that flows through your network, while packet analysis allows you to inspect and decode the content, structure, and protocols of each packet. Packet capture and analysis can help you identify and diagnose network issues, such as congestion, latency, errors, misconfigurations, attacks, and anomalies. You can use tools like Wireshark, tcpdump, or nmap to perform packet capture and analysis on your network devices or hosts.

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José Quintino Costa

Microsoft MVP | MCT | Azure Solutions Architect | Azure Administrator | Azure Security Engineer
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Experienced system administrators often recommend advanced network monitoring techniques that include deep packet inspection for detailed traffic analysis, anomaly detection using AI and machine learning to identify unusual patterns, network traffic analysis for real-time visibility, and automated alerts for proactive issue resolution. They also suggest integrating log management for comprehensive data analysis, using performance baselines to detect deviations, and employing network segmentation for security and easier management. These techniques provide a robust framework for maintaining network health and security.

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Vusal Quliyev

System Administrator
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What is network monitoring? Network monitoring, also frequently called network management, is the practice of consistently overseeing a computer network for any failures or deficiencies to ensure continued network performance. Technically, network monitoring can be viewed as a subset of network management, but the two are considered equivalent in practice. Network monitoring collects and reports on a variety of data from a computer network, including routers, switches, firewalls, load balancers and even endpoints, like servers and workstations. The collected data is filtered and analyzed to identify a variety of network problems. These network problems can include the following: device failures link outages interface errors packet loss

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2 NetFlow and sFlow

Another advanced technique for network monitoring is NetFlow and sFlow. NetFlow and sFlow are protocols that enable you to collect and export statistics about the traffic that passes through your network devices, such as routers, switches, or firewalls. NetFlow and sFlow can help you monitor the volume, direction, and type of traffic on your network, as well as the source and destination of each flow. You can use tools like ntopng, Cacti, or SolarWinds to visualize and analyze the NetFlow and sFlow data that you collect from your network devices.

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3 SNMP and WMI

A third advanced technique for network monitoring is SNMP and WMI. SNMP and WMI are protocols that enable you to query and manage the status, configuration, and performance of your network devices and hosts. SNMP and WMI can help you monitor the health, availability, and utilization of your network resources, such as CPU, memory, disk, bandwidth, or processes. You can use tools like Nagios, Zabbix, or PRTG to poll and display the SNMP and WMI data that you collect from your network devices and hosts.

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4 Syslog and Event Logs

A fourth advanced technique for network monitoring is Syslog and Event Logs. Syslog and Event Logs are protocols that enable you to collect and store the log messages that are generated by your network devices and hosts. Syslog and Event Logs can help you monitor the activity, events, and alerts on your network, such as errors, warnings, failures, or security incidents. You can use tools like Logstash, Splunk, or Graylog to aggregate and analyze the Syslog and Event Logs data that you collect from your network devices and hosts.

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5 Network Mapping and Discovery

A fifth advanced technique for network monitoring is network mapping and discovery. Network mapping and discovery are processes that enable you to discover and visualize the topology, components, and connections of your network. Network mapping and discovery can help you monitor the structure, layout, and dependencies of your network, as well as the changes and updates that occur on your network. You can use tools like Nmap, Zenmap, or Spiceworks to scan and map your network devices and hosts.

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6 Network Simulation and Testing

A sixth advanced technique for network monitoring is network simulation and testing. Network simulation and testing are processes that enable you to create and run scenarios that mimic the behavior and conditions of your network. Network simulation and testing can help you monitor the performance, functionality, and resilience of your network, as well as the impact of potential changes or problems on your network. You can use tools like GNS3, Packet Tracer, or NetSim to simulate and test your network devices and hosts.

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7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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What advanced network monitoring techniques do experienced system administrators recommend?

1

2

3

4

5

6

7

1 Packet Capture and Analysis

2 NetFlow and sFlow

3 SNMP and WMI

4 Syslog and Event Logs

5 Network Mapping and Discovery

6 Network Simulation and Testing

7 Here’s what else to consider

System Administration

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What advanced network monitoring techniques do experienced system administrators recommend?

1

2

3

4

5

6

7

1 Packet Capture and Analysis

2 NetFlow and sFlow

3 SNMP and WMI

4 Syslog and Event Logs

5 Network Mapping and Discovery

6 Network Simulation and Testing

7 Here’s what else to consider

System Administration

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