V Flashcards
validation
See template validation.
value
Instances of attributes for an item, such as cells in a spreadsheet. An attribute might have multiple values.
Tagging resources: A specific tag label that acts as a descriptor within a tag category (key). For example, you might have EC2 instance with the tag key of Owner and the tag value of Jan. You can tag an AWS resource with up to 10 key–value pairs. Not all AWS resources can be tagged.
Variable Envelope Return Path
See VERP.
verification
The process of confirming that you own an email address or a domain so that you can send email from or to it.
VERP
Variable Envelope Return Path. A way in which email sending applications can match bounced email with the undeliverable address that caused the bounce by using a different return path for each recipient. VERP is typically used for mailing lists. With VERP, the recipient’s email address is embedded in the address of the return path, which is where bounced email is returned. This makes it possible to automate the processing of bounced email without having to open the bounce messages, which may vary in content.
versioning
Every object in Amazon S3 has a key and a version ID. Objects with the same key, but different version IDs can be stored in the same bucket. Versioning is enabled at the bucket layer using PUT Bucket versioning.
VGW
See virtual private gateway.
virtualization
Allows multiple guest virtual machines (VM) to run on a host operating system. Guest VMs can run on one or more levels above the host hardware, depending on the type of virtualization.
See Also PV virtualization.
See Also HVM virtualization.
virtual private cloud
See VPC.
virtual private gateway
(VGW) The Amazon side of a VPN connection that maintains connectivity. The internal interfaces of the virtual private gateway connect to your VPC via the VPN attachment and the external interfaces connect to the VPN connection, which leads to the customer gateway.
visibility timeout
The period of time that a message is invisible to the rest of your application after an application component gets it from the queue. During the visibility timeout, the component that received the message usually processes it, and then deletes it from the queue. This prevents multiple components from processing the same message.
volume
A fixed amount of storage on an instance. You can share volume data between containers and persist the data on the container instance when the containers are no longer running.
VPC
Virtual private cloud. An elastic network populated by infrastructure, platform, and application services that share common security and interconnection.
VPC endpoint
A feature that enables you to create a private connection between your VPC and an another AWS service without requiring access over the internet, through a NAT instance, a VPN connection, or AWS Direct Connect.
VPG
See virtual private gateway.