In computer networking
, dot-decimal notation
(also known as quad-dotted notation
and dotted quad notation
addresses) is a method of writing binary numbers in octet
(decimal) numbers separated by dots (full stops
). The dots allow for convenient separation of the individual octet values.
For example, the hexadecimal number 0xFF000000 can be expressed in dotted-decimal notation as "255.0.0.0".
IPv4 addresses are almost universally presented in dot-decimal notation (see illustration).
A similar notation is widely used in typography to number sections of documents (see ISO 2145