21) server/client, and producer/consumer A. Profinet IRT C. PowerLink B. EtherCat E. Sercos D. HART 22) In Profinet the standard TCP/IP performance class is used for A. Hard Real Time application C. Soft real Time Application B. None Real Time application E. A and C D. A and B 23) Clock-synchronized cycle times less or equal than one millisecond is provided by A. Profinet IRT B. Profinet RT C. Profinet standard TCP/P D. All of the above E. None of the above 24) Which of the following is not True about EtherCat A. Master/Slave Architecture B. Ring Topology: daisy chain C. An example of "on top of Ethernet" Industrial Ethernet technologies D. Extensibility 25) One of the following doesn't characterize an Industrial application message A. Periodic traffic with deadlines B. Very Long Packets (in Giga bytes) C. Acyclic packets (alarms) with D. May require Prioritization () ( and 2 gl bounded latency 26) Which of the following is not true about wireless Ad hoc networks? A. nodes can only transmit to other B. Always needs a Base station to nodes within link coverage operate C. Communications are usually D. No connection to larger Internet decentralized 27) Given a Physical layer implementation of a wireless communication, which of the following relations is true? A) decrease power increase SNR->decrease BER B) decrease power decrease SNR->increase BER C) increase power decrease SNR->increase BER