Channel utilization with pipelining. Suppose a packet 10K bits long, the channel transmission rate connecting a sender and receiver is 10 Mbps, and the round-trip propagation delay is 10 ms. How many packets can the sender transmit before it starts receiving acknowledgments back? O 100 O 10,000 O 1000 10 O 1
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- We send real-time voice from Host A to Host B over a packet-switched network (VolP). Host A converts analog voice to a disital 64 Kbps bitstream on the fly then groups the bits into 64-byte packets. As soon as Host A gathers a packet, it sends it to Host R (Obviously a data packet must be generated first before any bit inside it can be transmitted). There is one link between Hosts A and B; its transmission rate is 10 Mbps and its propagation delay is 10 msec. As soon as Host B receives an entire packet, it converts the packet's bits to an analog signal How much time (in milliseconds) elapses from the time a bit is created from the original analog signal at Host A) until the bis arrived at Host B and gets decodedas part of the analog signal at Host B)? Hint Calculate the time to generate a packet of 648 time to transmit this packettime to propagate Your aewwer should only contain umbers rounded to the hundredth (For example 123 S) PrviousConsider sending real-time voice from Host A to Host B over a packet-switched network (VolP). Host A converts analog voice to a digital 64 kbps bit stream on the fly. Host A then groups the bits into 56-byte packets. There is one link between Hosts A and B; its transmission rate is 2 Mbps and its propagation delay is 10 msec. As soon as Host A gathers a packet, it sends it to Host B. As soon as Host B receives an entire packet, it coverts the packet's bits to an analog signal. How much time elapses from the time a bit is created (from the original analog signal at Host A) until the bit is decoded (as part of the analog signal at Host B)?A sender with window size (W=3) is connected to a selective repeat receiver by a link with bandwidth =106 bytes/second and propagation delay of 0.25 msec. The receiver sends Positive ACK for correctly received packets. For each packet sent, the sender sets a timer with time out value of 5 msec. On receiving an ack for a packet, the timer for that packet is cancelled. If the timer expires, that packet is retransmitted immediately. Assume that the sender sends packets 1, 2, and 3 (at t=0, packet size =1000 Bytes) and packet 2 is lost. NO other packet is lost. Under this scheme , at what time in msec would all the packets been received at the receiver.
- 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 areConsider two hosts, A and B that are connected by a transmissions link of2.1 Mbps. Assume that packets are of length 2.0 Kb (Kilobits) and the length of the link is 100Km. a. What is the propagation delay from A to B, that is the amount of time from when the first bit of the packet is transmitted at A, until it is received at B? b. What is the transmission time of the packet at A (the time from when the first bit of the packet is sent into the wire and the time at which the last bit is sent into the wire). c. Suppose now that that length of the link is doubled. What is the propagation delay from A to B now and what is the transmission time? d. Now suppose that node C is connected to node B also by a 2 Mbps, 100 Km link. How long does it take from when the first bit is transmitted by A to when the last bit is received at C, assuming B operates in a store-and -forward manner?A sender with window size (W=3) is connected to a go back N receiver by a link with bandwidth =106 bytes/second and propagation delay of 0.25 msec. The receiver sends Positive ACK for correctly received in order packets. For each packet sent, the sender sets a timer with time out value of 5 msec. On receiving an ack for that packet, the timer is cancelled. If the timer expires, that packet is retransmitted immediately. Assume that the sender sends packets 1, 2, and 3 (at t=0, packet size =1000 Bytes) and packet 2 is lost. NO other packet is lost. Under this scheme , at what time (in msec) would all the packets been received at the receiver.
- Consider a network connecting two systems located 4000 kilometers apart. The bandwidth of the network is 500 x Mbps. The propagation speed of the media is 4 × 106 meters per second. It is needed to design a Go-Back-N sliding window protocol for this network. The average packet size is 107 bits. The network is to be used to its full capacity. Assume that processing delays at nodes are negligible. What is the minimum size in bits of the sequence number field?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 isConsider sending real-time data from Host A to Host B over a packet-switched network. Host A takes an 8-bit measurement every millisecond, and Host A collects these into 64-byte packets. There is one link between Hosts A and B; its transmission rate is 5 Mbps, its propagation delay is 2 × 108 meters/sec, and its length is 3 km. As soon as Host A gathers a packet, it sends the packet to Host B. How much time elapses from the time that Host A begins to take the first measurement in a packet until the entire packet reaches Host B?
- What are the propagation time and the transmission time for a 5-MB (megabyte) message (an image) if the bandwidth of the network is 1 Mbps? Assume that the distance between the sender and the receiver is 12,000 km and each word requires 8-bit with light travels at 2.4 * 108 m/sSuppose that Bob sends N back-to-back packets (numbered 1 to N) to Alice over two links (shown below) with the link between Bob's computer and the router having a transmission rate of R bits/sec (bps), and the link between the router and Alice's computer having a transmission rate of 2R bps. Bob Alice R bps 2R bps Router Find a formula, in terms of N, L and R, that characterizes the end-to-end delay of sending the N packets to Alice (i.e., the time needed for the last bit of the Nth packet to arrive at Alice since Bob starts transmitting the first bit of the first packet). Consider only the transmission delay that occurs in sending packets in your analysis. Show your work in detail. Also, using your formula, N = 800 packets, L find the end-to-end delay when 400 bits, and R = 100 bps.Consider a network using slotted aloha medium access control protocol, where each frame length is of 8000 bits. The channel Bandwidth rate is 10 KBps. The average number of transmissions at each node are 20 frames per second and propagation delay is 10 ms. The average number of successful transmissions is given by ? (Round off to two decimal places).