What Are the Differences Between Public Bandwidth and Private Bandwidth?

Public Bandwidth

Public bandwidth is the bandwidth consumed when data is transferred between cloud instances and the Internet. You can configure the public bandwidth when creating an ECS or bind an EIP to an ECS after the ECS is created.

Public bandwidth is classified into inbound bandwidth and outbound bandwidth.

Inbound bandwidth is the bandwidth consumed when data is transferred from the Internet to the cloud. For example, when resources are downloaded from the Internet to ECSs, that consumes inbound bandwidth.

Outbound bandwidth is the bandwidth consumed when data is transferred from the cloud to the Internet. For example, when ECSs provide services accessible from the Internet and external users download resources from the ECSs, this consumes outbound bandwidth.

Private Bandwidth

Private bandwidth is the bandwidth consumed when data is transferred between ECSs in the same region and on the same private network. ECSs can also be connected to cloud databases, load balancers, and OBS through private bandwidth. The private bandwidth size depends on the instance specifications.