Rename ndncatchunks to ndnget
Change-Id: I260e552746e900a73c2ce773bd91d9b6fa384734
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+# ndnget
+
+**ndnget** is a consumer program that fetches the segments (Data packets) of a named object,
+optionally discovering the latest version of the object, and then writes the content of the
+retrieved object to the standard output.
+
+## Version discovery in ndnget
+
+If a version component is present at the end of the user-specified NDN name, the provided version
+number will be used, without any version discovery process. Otherwise, discovery Interest(s) will
+be sent out to fetch metadata of the solicited content from which the Data version will be resolved.
+For more information about the packet format and naming conventions of Interest and Data packets
+used for version discovery in ndnget, please refer to:
+[Realtime Data Retrieval (RDR) protocol](https://redmine.named-data.net/projects/ndn-tlv/wiki/RDR).
+
+## Interest pipeline types in ndnget
+
+* `fixed`: maintains a fixed-size window of Interests in flight; the window size is configurable
+ via a command line option and defaults to 1.
+
+* `aimd` : adjusts the window size via additive-increase/multiplicative-decrease (AIMD).
+ By default, it uses a Conservative Window Adaptation, that is, the congestion window
+ will be decreased at most once per round-trip-time.
+
+* `cubic`: adjusts the window size similar to the TCP CUBIC algorithm.
+ For details about both aimd and cubic please refer to:
+ [A Practical Congestion Control Scheme for Named Data
+ Networking](https://conferences2.sigcomm.org/acm-icn/2016/proceedings/p21-schneider.pdf).
+
+The default Interest pipeline type is `cubic`.
+
+## Usage examples
+
+To retrieve the latest version of a published object, the following command can be used:
+
+ ndnget /localhost/demo/gpl3
+
+To fetch a specific version of a published object, you can specify the version number at the end
+of the name. For example, if the version is known to be 1449078495094, the following command
+will fetch that exact version of the object (without version discovery):
+
+ ndnget -Nt /localhost/demo/gpl3/v=1449078495094
+
+For more information, run the programs with `--help` as argument.