ALB Product Supports SNI

The ALB product supports the SNI feature, which primarily solves the disadvantage of only being able to use one certificate for a listener. After creating an HTTPS listener, SNI is enabled by default. When the client initiates an SSL handshake request, it submits the requested domain information. Upon receiving the SSL request, ALB will search for the corresponding certificate based on the requested domain. If a certificate corresponding to the domain is found, it will return the certificate; if no certificate corresponding to the domain is found, it will return the default certificate.

ALB supports this feature by default when configuring an HTTPS listener, meaning it supports binding multiple certificates.