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- 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 systems P and Q connected via a router R with the bandwidth of 2 Gbps. The length of the packet is 1000 bytes. The propagation delay between P and Q is 200 microseconds. The distance between the P and R is 10 km while the distance between R and Q is 5 km. The propagation speed in meter per second if each link is having the same 10³ km/s? propagation speed 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?
- In this problem you will be doing some elementary calculations oftransmission and propagation delays.Consider 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 thelength of the link is 100Km.a. What is the propagation delay from A to B, that is the amount of timefrom when the first bit of the packet is transmitted at A, until it is receivedat B? and 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).A link has a transmission speed of 1010 bits/sec. It uses data packets of size 2000 bytes each. The efficiency of the stop-and-wait protocol in this setup is exactly 30%. Determine the value of the one-way propagation delay in milliseconds. Assume that the acknowledgement has negligibletransmission delay, and its propagation delay is the same as the data propagation delay. Consider the same transmission speed and packet size for Go back-N protocol with window size 8 and find the channel utilization.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.
- 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 two-link network in which Host A has a 1 Mbps connection with a 10 ms propagation delay and the router has a 15 Mbps link with a 25 ms propagation delay. Host A sends Host B a 1500-byte packet. What is the packet transmission delay from the router to Host B (in milliseconds)?Consider a router that transmits bits onto a transmission medium at the rate of 2 Mbps. Let the link be 3 km in length, and bits propagate through the transmission medium at the speed of (approximately) 3x10^8 meters/sec. What is the transmission delay in seconds to transmit a packet of size 2,0o0 bits onto the link? a. 1x10^-5 seconds O b. .001 seconds с. 1 second d. -4 seconds
- Host A is sending data to host Bover a full duplex link. A and B are using the sliding window protocol for flow control. The send and receive window sizes are 5 packets each. Data packets (sent only from A to B) are all 1000 bytes long and the transmission time for such a packet is 50 µs. Acknowledgment packets (sent only from B to A) are very small and require negligible transmission time. The propagation delay over the link is 200 µs. What is the maximum achievable throughput in this communication?In this problem, we consider sending real-time voice from Host A to Host B over a packet-switched network (VoIP). 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 and when a packet is formed, it is send to host B. There is one link between Hosts A and B; its transmission rate is 2 Mbps and its propagation delay is 10 msec. What's the elapsed time since when the first bit is formed (from the original analog signal at Host A) until the bit is received at host B?Consider two hosts, A and B, connected by a single link of rate R bps. Suppose that the two hosts are separated by m meters, and suppose the propagation speed along the link is s meters/sec. Host A is to send a packet of size L bits to host B. a. Suppose host A begins to transmit the packet at time t= 0, at time t-dtrans, where is the last bit of the packet? b. Suppose dprop is greater than dtrans. At time t =dtrans, where is the first bit of the packet? c. Suppose dprop is less than dtrans. At time t =dtrans, where is the first bit of the packet? d. Suppose s=2.5 x 108, L=100 bits, and R=28 Kbps. Find the distance m so that dprop = dtrans.