Point to Point Protocol (PPP) Tutorial. Point-to-Point Protocol (PPP) is an open standard protocol that is mostly used to provide connections over point-to-point serial links. The main purpose of PPP is to transport Layer 3 packets over a Data Link layer point-to-point link.
1 Notice, in the following example, the above citation corresponds with the first word of the source as listed in the Bibliography. . .: McCollister, Betty. ' 2 The Social Necessity of Nurturance.' Humanist. 3  Jan/Feb 2001.
Definition of citation for English Language Learners. : 1  an official order to appear before a court of law. : 2  a formal public statement that praises a person for doing something good or brave. : 3  a line or short section taken from a piece of writing or a speech.