Differences

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--- gcp:c [2023/05/05 08:55] – fgm
+++ gcp:c [2023/05/22 19:03] (current) – fgm
@@ Line 5: / Line 5: @@
       * https://sre.google/workbook/canarying-releases/
     * Elsewhere: serving a release to a predefined test population, as opposed to A/B which is statistics-based
+  * [[wp>CIDR]] = Classless Inter-Domain Routing
+    * A 1993 replacement for the legacy class-based (A, B, C..) IPv4 addressing architecture, replacing the old fixed size network addresses by sizes defined as powers of two, leading to the ''x.y.z.t/nn'' notation (''1 < nn < 23''), describing the number of bits making up the network part in an IP address, starting from the leftmost bits.
+    * The largest network, with mask ''/0'' covers the entire IPv4 addressing space
+    * The smallest network, with mask ''/32'' covers a single IPv4 address
+    * In practice, GCP networks need a minimum of 4 reserved IP addresses, hence 8 to be practical, for a smallest network mask of ''32-log2(8) = /29'', and the largest network is a ''/16'' for 64 addresses.
+    * Standardized as [[https://datatracker.ietf.org/doc/html/rfc4632|RFC 4632]]
   * Cloud Load Balancing
     * An umbrella product for GCP load balancing offerings