110) IEEE Project 802 divides the data link layer into which upper sublayer and which lower sublayer ?

111) One important characteristics of the hub architecture of ARC - net is

112) Which of the following device is used with an X-25 network to provide service to asynchronous terminals

113) Frequency of failure and network recovery time after a failure are measures of what concept of a network

114) When a protocol specifies that address of the sender means the most recent sender and not the original source, what does this mean