N Flashcards
namespace
An abstract container that provides context for the items (names, or technical terms, or words) it holds, and allows disambiguation of homonym items residing in different namespaces.
NAT
Network address translation. A strategy of mapping one or more IP addresses to another while data packets are in transit across a traffic routing device. This is commonly used to restrict internet communication to private instances while allowing outgoing traffic.
See Also Network Address Translation and Protocol Translation.
See Also NAT gateway.
See Also NAT instance.
NAT gateway
A NAT device, managed by AWS, that performs network address translation in a private subnet, to secure inbound internet traffic. A NAT gateway uses both NAT and port address translation.
See Also NAT instance.
NAT instance
A NAT device, configured by a user, that performs network address translation in a VPC public subnet to secure inbound internet traffic.
See Also NAT gateway.
network ACL
An optional layer of security that acts as a firewall for controlling traffic in and out of a subnet. You can associate multiple subnets with a single network ACL, but a subnet can be associated with only one network ACL at a time.
Network Address Translation and Protocol Translation
(NAT-PT) An internet protocol standard defined in RFC 2766.
See Also NAT instance.
See Also NAT gateway.
n-gram processor
A processor that performs n-gram transformations.
See Also n-gram transformation.
n-gram transformation
Amazon Machine Learning: A transformation that aids in text string analysis. An n-gram transformation takes a text variable as input and outputs strings by sliding a window of size n words, where n is specified by the user, over the text, and outputting every string of words of size n and all smaller sizes. For example, specifying the n-gram transformation with window size =2 returns all the two-word combinations and all of the single words.
node
Amazon Elasticsearch Service (Amazon ES): An Elasticsearch instance. A node can be either a data instance or a dedicated master instance.
See Also dedicated master node.
NoEcho
A property of AWS CloudFormation parameters that prevent the otherwise default reporting of names and values of a template parameter. Declaring the NoEcho property causes the parameter value to be masked with asterisks in the report by the cfn-describe-stacks command.
NoSQL
Nonrelational database systems that are highly available, scalable, and optimized for high performance. Instead of the relational model, NoSQL databases (like Amazon DynamoDB) use alternate models for data management, such as key–value pairs or document storage.
null object
A null object is one whose version ID is null. Amazon S3 adds a null object to a bucket when versioning for that bucket is suspended. It is possible to have only one null object for each key in a bucket.
number of passes
The number of times that you allow Amazon Machine Learning to use the same data records to train a machine learning model.
