Question 1__________________ is located at the subscribers premises. Question 2 The ______________ is the last responsibility of the service provider Question 3_______________ was created to be us

 Question 1__________________ is located at the subscribers premises. 

 Question 2 The ______________ is the last responsibility of the service provider  

Question 3_______________ was created to be used as a connection-oriented protocol at the Data Link layer for use with X.25.  

Question 4______________ is a proprietary connection-oriented protocol used at the Data Link layer and carries no identification of the type of protocol being carried inside its encapsulation.