Merge pull request #46006 from stversch/patch-1

Update architecture.md

Author: ktoliver

articles/asc-for-iot/architecture.md

@@ -35,7 +35,7 @@ Azure Security Center for IoT is composed of the following components:
 Azure Security Center for IoT works in one of two feature workflows: Built-in and Enhanced  
 
 ### Built-in
-In **Built-in** mode, Azure Security Center for IoT is enabled when you elect to turn on the **Security** option in your IoT Hub. Offering real-time monitoring, recommendations and alerts, Built-in mode offers singe-step device visibility and unmatched security. Build-in mode does not require agent installation on any devices and uses advanced analytics on logged activities to analyze and protect your field device. 
+In **Built-in** mode, Azure Security Center for IoT is enabled when you elect to turn on the **Security** option in your IoT Hub. Offering real-time monitoring, recommendations and alerts, Built-in mode offers single-step device visibility and unmatched security. Build-in mode does not require agent installation on any devices and uses advanced analytics on logged activities to analyze and protect your field device. 
 
 ### Enhanced 
 In **Enhanced** mode, after turning on the **Security** option in your IoT Hub and installing Azure Security Center for IoT device agents on your devices, the agents collect, aggregate and analyze raw security events from your devices. Raw security events can include IP connections, process creation, user logins, and other security-relevant information. Azure Security Center for IoT device agents also handle event aggregation to help avoid high network throughput. The agents are highly customizable, allowing you to use them for specific tasks, such as sending only important information at the fastest SLA, or for aggregating extensive security information and context into larger segments, avoiding higher service costs.