Which AWS instance address has the following characteristics?
“If you stop an instance, its Elastic IP address is unmapped, and you must remap it when you restart the
instance.”
A.
None of these
B.
EC2-VPC Addresses
C.
EC2-Classic Addresses
D.
Both
IP Address Differences Between EC2-Classic and EC2-VPC
The following table summarizes the differences between IP addresses for instances launched in EC2-Classic, instances launched in a default subnet, and instances launched in a nondefault subnet.
Characteristic EC2-Classic Default Subnet Nondefault Subnet
Public IP address (from Amazon’s public IPv4 address pool)
Your instance receives a public IP address.
Your instance receives a public IP address by default, unless you specify otherwise during launch, or you modify the subnet’s public IP address attribute.
Your instance doesn’t receive a public IP address by default, unless you specify otherwise during launch, or you modify the subnet’s public IP address attribute.
Private IPv4 address
Your instance receives a private IP address from the EC2-Classic range each time it’s started.
Your instance receives a static private IP address from the IPv4 address range of your default subnet.
Your instance receives a static private IP address from the IPv4 address range of your subnet.
Multiple IPv4 addresses
We select a single private IP address for your instance; multiple IP addresses are not supported.
You can assign multiple private IP addresses to your instance.
You can assign multiple private IP addresses to your instance.
Network interfaces
IP addresses are associated with the instance; network interfaces aren’t supported.
IP addresses are associated with a network interface. Each instance has one or more network interfaces.
IP addresses are associated with a network interface. Each instance has one or more network interfaces.
Elastic IP address (IPv4)
An Elastic IP address is disassociated from your instance when you stop it.
An Elastic IP address remains associated with your instance when you stop it.
An Elastic IP address remains associated with your instance when you stop it.
DNS hostnames (IPv4)
DNS hostnames are enabled by default.
DNS hostnames are enabled by default.
DNS hostnames are disabled by default, except if you’ve created your VPC using the VPC wizard in the Amazon VPC console.
IPv6 address Not supported. Your instance cannot receive an IPv6 address. Your instance does not receive an IPv6 address by default unless you’ve associated an IPv6 CIDR block with your VPC and subnet, and either specified an IPv6 address during launch, or modified your subnet’s IPv6 addressing attribute. Your instance does not receive an IPv6 address by default unless you’ve associated an IPv6 CIDR block with your VPC and subnet, and either specified an IPv6 address during launch, or modified your subnet’s IPv6 addressing attribute.
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