# Ubuntu Azure Kernel Network Performance

Not all Azure Linux VM's are created equal, particularly when it comes to network performance 💨  
   
The Ubuntu Azure kernel is the most optimized for network performance on Azure. The majority of Linux 🖥 in Azure runs on Ubuntu making it the OS of choice for developers and admins.  
   
Here are a few benefits of using Ubuntu 22.04 LTS Azure images over other available Linux flavors:  
\- Currently runs on 5.15.x kernel version which is higher than some other available images  
\- Pre-configured with DNS caching using systemd-resolved  
\- Multi-path TCP (MPTCP) settings enabled allowing for multiplexing of connections into a single data-stream for increased resiliency and throughput  
\- Azure Accelerated Networking provides consistent ultra-low network latency  
   
Check if you're Ubuntu VM is running on the optimized Azure Linux kernel to get the above benefits and more by running "uname -r", example output below which ends in "-azure":  
𝟱.𝟭𝟱.𝟬-𝟭𝟬𝟮𝟵-𝗮𝘇𝘂𝗿𝗲

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