1. What state is the sender in if it is only waiting for a packet from the network? a. Steady state b. Ready state c. Waiting state d. Blocking state 2. Several APIs have been designed for communication. Which one of the following choices is not among them? a. Socket Interface b. TLI c. STREAM d. UDP 3. If a station is not aware of another station's transmission, due to some obstacles or range problems, a collision may occur causing the transmission to be what? a. transferred b. forwarded c. stopped d. undetected 4. What is used to identify packets during data transfer? a. VCI b. PCP c. CMSA d. LCR