1. State whether the following statements are true or false. Please justify your a. In an error-free data network, the IP packet received by IP layer at server b. Using multilevel signaling, it is possible to arbitrarily increase the bit rate answer and show all work, 120 pointsl is identical to that transmitted by the client at the physical layer by increasing the number of levels that each pulse carries. Frame error rates as seen at Layer 2 (data link layer) is always greater than or equal to bit error rate at Layer 1 (physical layer) c. d. For a given noise density and signal power, Shannon's channel capacity indicates that capacity is directly proportional to channel bandwidth. It is not necessary to use link-layer ARQ for TCP based applications since TCP already has an error control mechanism e. f. Given that the minimum Hamming Distance of Hamming(7,4) code discussed in class is 3, it cannot detect any more than 3 errors. g. Efficiency of CSMA/CD MAC is always better than Slotted-ALOHA In addition to verifying the IP header checksum of an incoming packet and forwarding the packet to an output node based on destination IP address, a typical IP router has to re-compute the header checksum before forwarding the IP packet from input node to output node. h. i. In a router with an M/M/1/K discipline, it is always good to increase the queue depth K since it reduces blocking probability. By inspecting Layer-2 MAC address, it is possible to uniquely identify the IP multicast address of an ongoing IP multicast session j