Security & Compliance第 43 / 100 题
In a VPC, which stateful virtual firewall controls inbound and outbound traffic at the instance level?
a.Network access control list (NACL)
b.Security group
c.Internet gateway
d.Route table
解析
A security group acts as a stateful firewall at the instance (ENI) level, where return traffic is automatically allowed. NACLs, by contrast, are stateless firewalls that operate at the subnet level.
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