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- Consider building a CSMA/CD network running at 10Mbps over a cable with no repeaters. If the signal speed in the cable is 106 km/sec and minimum frame size is 1500 bytes, then what is the cable length (km)?Consider a CSMA/CD network that transmits data at a rate of 100 Mbps (108 bits per second) over a 1 km (kilometer) cable with no repeaters. If the minimum frame size required for this network is 1250 bytes, what is the signal speed (km/sec) in the cable?Consider building a CSMA/CD network running at 1 Gbps over a 1km cable with no repeaters. The signal speed in the cable is 200000km/sec. What is the minimum frame size?
- Suppose we have a reservation system with 50 users, frame transmission time of 0.6 sec, v = 0.3. (a) What is the effective frame transmission time? (b) What is the efficiency/throughput if all stations are transmitting? (c) What is the efficiency/throughput if a minislot can reserve up to 7 frames?Consider two systems are connected with LAN cable. The length of the cable is 3 kilometers and the data transmitted at a rate of 30 MB/s. The signal speed in the cable is 2.5 x 108 m/s. What is the minimum frame size in bits in the CSMA/CD network?Assume that the propagation speed in a coaxial cable is 2 ∙108 m/s a. Packets are transmitted using the ABP (alternate bit protocol) over a full-duplex 5-km coaxial cable with a 5 Mbps transmission rate. The packets and ACKs are 1500 bits long. The transmitter and receiver use a CRC chip and their processing time is negligible. How many packets are transmitted every second when there is no transmission error? b. Five transmission lines identical to the one discussed in a) are connected in series. A buffer is used at each connection between the links to store packets as required. How many packets will go through the five lines every second when there are no transmission errors? Now assume that a packet or its acknowledgement is corrupted on any given link with probability p. What is the new packet transmission rate through the five links? Comment. Assume the processing delays and queuing delays for both ends are negligible.
- Consider two hosts S and R connected directly by a link. A link has a transmission speed of 107 bits/sec. It uses data packets of size 400 bytes. Data needed to transmitted is 400 bytes. Length of the link is 600 km and the propagation speed are 3 × 108 meter per second. T is the transmission delay and P is the propagation delay. The propagation delay in millisecond and transmission delay in microsecond respectively areIn a CSMA/CD network with a data rate of 10 Mbps, the minimum frame size is found to be 512 bits over maximum cable length 2500 m. what should be the maximum cable length if we increase the data rate to 100 Mbps?A signal in a network has a propagation velocity of 1.77x10" m/s and a delay of 4.3 us introduced by each repeater. If the round trip delay for two computers at either end of a link that includes three repeaters is 52.92 us, calculate the length of this link? Express your answer in kilometers.
- Consider that the link capacity of a channel is 512 Kbps and round – trip delay time is 1000ms find the bandwidth delay product.A TCP connection is established through 10 wireless hops in an acoustic underwater ad hoc network. Assume that each hop is 100 meter in the average, acoustic signals travel 1500 meter per second, 10 kilobit data can be sent per second over a link, the source node has one megabyte of data to send, the receiver window size is 64 kilobytes, the maximum segment size is 1 kilobyte and the average processing delay for routing at each node is one millisecond. Assume also that the following segments do not reach the destination: 67, 112, 137. What would be the average utilization of the links for this connection if there is not another communications through them? Explain an alternative approach to increase the bandwidth utilization?10. For a 10 Mbps data link using 12,000-bit frames, and assuming that electrical signals propagate at 2.5 x 108 m/s: a. How long does it take to introduce a single frame onto the link? b. How long does it take for the trailing edge of the frame to travel 1,620 km? c. What is the total transmission time of this frame, from start to finish?