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Amazon Virtual Private Cloud
Amazon Virtual Private Cloud (VPC) is a commercial cloud computing service that provides users a virtual private cloud, by "provision() a logically isolated section of Amazon Web Services (AWS) Cloud".〔 Enterprise customers are able to access the Amazon Elastic Compute Cloud (EC2) over an IPsec based virtual private network.〔(Amazon to soothe Enterprise fears with Virtual Private Cloud )〕〔(Amazon launches Virtual Private Cloud service )〕 Unlike traditional EC2 instances which are allocated internal and external IP numbers by Amazon, the customer can assign IP numbers of their choosing from one or more subnets.〔(Amazon Integrates With Datacenter Using Private Clouds VPC Peering )〕 By giving the user the option of selecting which AWS resources are public facing and which are not, VPC provides much more granular control over security. For Amazon it is "an endorsement of the hybrid approach, but it's also meant to combat the growing interest in private clouds".〔(Amazon Adds a Virtual Private Cloud VPC Peering )〕 ==IP Addressing== Initially, users are able to choose a range of IP addresses for their VPC. Within this range, users can assign various private and public IPv4 (not IPv6)〔 addresses to instances in the VPC in order to communicate with the Internet and other instances of VPCs. These addresses are assigned to specific instances rather than the user's entire VPC account.〔 Assignment of Public IP addresses is not possible, instead the address is assigned and unassigned in certain cases, causing the address of an instance to change. When a consistent IP address is needed, a third type of IP Address, Elastic IP addresses, can be used in place of Public IP addresses.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Amazon Virtual Private Cloud」の詳細全文を読む
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