What Is Virtual Private Cloud?
Virtual Private Cloud (VPC) allows you to provision logically isolated virtual private networks for cloud resources, such as cloud servers, containers, and databases. You can create subnets, security groups, network ACLs, route tables, and more to manage cloud resources flexibly. You can also use EIPs to connect cloud resources in VPCs to the Internet, and use Direct Connect and VPN to connect on-premises data centers to VPCs to build a hybrid cloud network.
Product Architecture
The following describes the basics, security, connectivity, and O&M of VPCs.
Item |
Brief |
Details |
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VPC basics |
A VPC is a logically isolated virtual private network. You can define a CIDR block for each VPC and add one or more subnets. You can also configure route tables to control where the traffic from your subnet is directed. VPCs are logically isolated from each other, but subnets in a VPC can communicate with each other by default. |
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VPC security |
Security groups and network ACLs protect the cloud resources deployed in a VPC. |
Network ACLs protect subnets, while security groups protect instances in a subnet. If both security group and network ACL rules are configured, traffic matches network ACL rules first and then security group rules. For details, see What Is Access Control? |
VPC connectivity |
You can combine VPC and other networking services to build networks to meet different requirements.
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VPCs and Subnets FAQs
- What Is Virtual Private Cloud?
- Which CIDR Blocks Are Available for the VPC Service?
- How Many VPCs Can I Create?
- Can Subnets Communicate with Each Other?
- What Subnet CIDR Blocks Are Available?
- Can I Modify the CIDR Block of a Subnet?
- How Many Subnets Can I Create?
- How Do I Make the Changed DHCP Lease Time of a Subnet Take Effect Immediately?
- Why Can't I Delete My VPCs and Subnets?
- Can I Change the VPC of an ECS?
- Why Is the ECS IP Address Released After the System Time Is Changed?
- How Do I Change the DNS Server Address of an ECS?
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