# InstanceAttachmentEnaSrdUdpSpecification
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ENA Express is compatible with both TCP and UDP transport protocols. When it's enabled, TCP traffic automatically uses it. However, some UDP-based applications are designed to handle network packets that are out of order, without a need for retransmission, such as live video broadcasting or other near-real-time applications. For UDP traffic, you can specify whether to use ENA Express, based on your application environment needs.

## Contents
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 ** enaSrdUdpEnabled **   
Indicates whether UDP traffic to and from the instance uses ENA Express. To specify this setting, you must first enable ENA Express.  
Type: Boolean  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/ec2-2016-11-15/InstanceAttachmentEnaSrdUdpSpecification) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ec2-2016-11-15/InstanceAttachmentEnaSrdUdpSpecification) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ec2-2016-11-15/InstanceAttachmentEnaSrdUdpSpecification)