- If traffic is raw TCP/UDP (like for databases) -> pick L4. 𝐋7 𝐋𝐨𝐚𝐝 𝐁𝐚𝐥𝐚𝐧𝐜𝐞𝐫 - An L7 load balancer operates at the application layer, and so it can see URLs, HTTP headers, cookies, ...