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Copy file name to clipboardExpand all lines: articles/network-watcher/traffic-analytics.md
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---
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title: Traffic analytics
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title: Traffic analytics overview
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titleSuffix: Azure Network Watcher
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description: Learn what Azure Network Watcher traffic analytics is, and how to use it for viewing network activity, securing networks, and optimizing performance.
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author: halkazwini
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ms.author: halkazwini
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ms.service: azure-network-watcher
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ms.topic: concept-article
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ms.date: 12/24/2024
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ms.date: 12/29/2024
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ms.custom: references_regions
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#CustomerIntent: As an Azure administrator, I want to use Traffic analytics to analyze Network Watcher flow logs so that I can view network activity, secure my networks, and optimize performance.
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To use traffic analytics, you need the following components:
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-**Network Watcher**: A regional service that you can use to monitor and diagnose conditions at a network-scenario level in Azure. You can use Network Watcher to turn network security group flow logs on and off. For more information, see [What is Azure Network Watcher?](network-watcher-monitoring-overview.md)
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-**Network Watcher**: A regional service that you can use to monitor and diagnose conditions at a network-scenario level in Azure. You can use Network Watcher to turn flow logs on and off in your subscription. For more information, see [What is Azure Network Watcher?](network-watcher-monitoring-overview.md) and [Enable or disable Azure Network Watcher](network-watcher-create.md).
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-**Log Analytics**: A tool in the Azure portal that you use to work with Azure Monitor Logs data. Azure Monitor Logs is an Azure service that collects monitoring data and stores the data in a central repository. This data can include events, performance data, or custom data that's provided through the Azure API. After this data is collected, it's available for alerting, analysis, and export. Monitoring applications such as network performance monitor and traffic analytics use Azure Monitor Logs as a foundation. For more information, see [Azure Monitor Logs](/azure/azure-monitor/logs/log-query-overview?toc=/azure/network-watcher/toc.json). Log Analytics provides a way to edit and run queries on logs. You can also use this tool to analyze query results. For more information, see [Overview of Log Analytics in Azure Monitor](/azure/azure-monitor/logs/log-analytics-overview?toc=/azure/network-watcher/toc.json).
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-**Log Analytics workspace**: The environment that stores Azure Monitor log data that pertains to an Azure account. For more information about Log Analytics workspaces, see [Overview of Log Analytics workspace](/azure/azure-monitor/logs/log-analytics-workspace-overview?toc=/azure/network-watcher/toc.json).
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-**Log Analytics workspace**: The environment that stores Azure Monitor log data that pertains to an Azure account. For more information about Log Analytics workspaces, see [Overview of Log Analytics workspace](/azure/azure-monitor/logs/log-analytics-workspace-overview?toc=/azure/network-watcher/toc.json) and [Create a Log Analytics workspace](/azure/azure-monitor/logs/quick-create-workspace?toc=/azure/network-watcher/toc.json).
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- Additionally, you need a network security group enabled for flow logging if you're using traffic analytics to analyze [network security group flow logs](nsg-flow-logs-overview.md) or a virtual network enabled for flow logging if you're using traffic analytics to analyze [virtual network flow logs](vnet-flow-logs-overview.md):
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- Information about the flow, such as the source and destination IP addresses, the source and destination ports, and the protocol.
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- The status of the traffic, such as allowed or denied.
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For more information about network security group flow logs, see [Network security group flow logs overview](nsg-flow-logs-overview.md).
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For more information, see [Network security group flow logs overview](nsg-flow-logs-overview.md) and [Create a network security group flow log](nsg-flow-logs-portal.md#create-a-flow-log).
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-**Virtual network (VNet)**: A resource that enables many types of Azure resources to securely communicate with each other, the internet, and on-premises networks. For more information, see [Virtual network overview](../virtual-network/virtual-networks-overview.md?toc=/azure/network-watcher/toc.json).
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- Information about the flow, such as the source and destination IP addresses, the source and destination ports, and the protocol.
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- The status of the traffic, such as allowed or denied.
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For more information about virtual network flow logs, see [Virtual network flow logs overview](vnet-flow-logs-overview.md).
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For more information, see [Virtual network flow logs overview](vnet-flow-logs-overview.md) and [Create a virtual network flow log](vnet-flow-logs-portal.md#create-a-flow-log).
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> [!NOTE]
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> For information about the differences between network security group flow logs and virtual network flow logs, see [Virtual network flow logs compared to network security group flow logs](vnet-flow-logs-overview.md#virtual-network-flow-logs-compared-to-network-security-group-flow-logs).
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To learn about the differences between network security group flow logs and virtual network flow logs, see [Virtual network flow logs compared to network security group flow logs](vnet-flow-logs-overview.md#virtual-network-flow-logs-compared-to-network-security-group-flow-logs).
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> [!NOTE]
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> To use Traffic analytics, you must assign one of the following [Azure built-in roles](../role-based-access-control/built-in-roles.md) to your account:
> ||[Network contributor](../role-based-access-control/built-in-roles.md?toc=/azure/network-watcher/toc.json#network-contributor) and [Monitoring contributor](../role-based-access-control/built-in-roles.md?toc=/azure/network-watcher/toc.json#monitoring-contributor)|
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>
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> If none of the preceding built-in roles are assigned to your account, assign a [custom role](../role-based-access-control/custom-roles.md?toc=/azure/network-watcher/toc.json) that supports the actions listed in [Traffic analytics permissions](required-rbac-permissions.md#traffic-analytics).
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