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- 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.CAT-6 twisted pair cable is a commonly used computer networks cable that provides afrequency bandwidth of up to 250 MHz. It is suitable for most varieties of Ethernet overtwisted pair up to 1000 BASE-T (Gigabit Ethernet). Determine whether a signal-to-noise ratio(SNR) of 20 dB is adequate to transmit 0.9 Gbps on this cable?Efficiency Principle:Ethernet V1 access protocol was designed to run at 10 Mbps over 2.5 Km using 1500 Byte packets. This same protocol needs to be used at 100 Mbps at the same efficiency (utilization). What distance can it cover if the frame size is not changed? (Note: be careful with the units.
- . For a 10 Mbps Ethernet with 100 stations connected to it has 50 % efficiency. Velocity of propagation is 2.1 x 10 m/sec. Find the ratio of transmission to propagation delay.Q) In pure ALOHA protocol the highest throughput is achived when G= and the channel can have a maximum utilization value of about percent.Computer A, B C, D and E is arranged in a ring topology. Calculate the propagation delay of sending one digital signal packet from Computer A to Computer E if the distance in each computer link is 2m.
- Suppose that we are sending a 30 Mb MP3 file from a source host to a destination host. All links in the path between source and destination have a transmission rate of 10 Mbps. Assume that the propagation speed is 2 × 108 meters/sec, and the distance between source and destination is 10,000 km. 1. Now suppose there is only one link between source and destination, and there are 10 FDM channels in the link. The MP3 file is sent over one of the channels. What is the end-to-end delay?In 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?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 are
- Let the two host X and Y connected via a packet switch with 107 bits per second links. Switch is placed at 50 km from X. X and Y are located at 100 Kilometer apart also the propagation speed along the link is 2 × 108 m/s. The switch begins forwarding a packet after 0.1 milliseconds it receives the packet. If 1000 bytes of File are needed to be transmitted and each packet size is 500 bytes, the time elapsed between the transmission of the first bit of data and the reception of the last bit of the data in millisecond isWhat is the delay of sending a data file from a source station to a destination station? Suppose that the length of the data file is 2 Mbytes and the bandwidth of the channel is 1600 bps, and the network link between the sender and receiver is 20000 Km and the speed of the light inside the link is 2x108 meters/second? Assume that the delay is composed of only transmission time and propagation time.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?