Assume that an end-to-end communications system is made up of three networks with date rate in Mbps ρ1, ρ2, and ρ3, respectively. Ignoring the other delay components, what is the total end-to-end delay to transmit a packet size of λ?

I need the answer as soon as possible

14. The link length is 2000km, the data transmission rate is 1kbit/s, and the data that needs to be sent is 100bit. The data propagation rate on this link is 2x10 m/s. Suppose we can see the bits transmitted on the link, try to draw the bits on the line we see: a) When 100bit is just sent. b) After another 0.05s

Que.a) Consider a CSMA/CD network that transmits data at a rate of 400 x 106 bits per second. The maximum signal propagation time from one node to another node is 20 microseconds. The minimum size of a frame in the network is(. bytes).

Consider a sender having an infinite number of frames to send, which we index as 0, 1, 2, .... Assume the transmission delay of each frame is 2t, the ACK transmission time is t, the propagation delay is 3t and symmetric on both directions, and the timeout value is T = 8 starting from the end of frame transmission onto the link. The first frame is sent out at time 0. Show Transcribed Text 3 Ĉ E. Explain what will happen if the sequence number space has exactly the same number of sequence numbers as the number of allowed maximum number of outstanding frames, e.g., when N = W = 10, and the sequence numbers available are only 0-9.

Consider a broadcast channel with N nodes and a transmission rate of R bps. Suppose the broadcast channel uses polling (with an additional polling node) for multiple access. Suppose the amount of time from when a node completes transmission until the subsequent node is permitted to transmit (that is, the polling delay) is ?poll. Suppose that within a polling round, a given node is allowed to transmit at most Q bits. What is the maximum throughput of the broadcast channel?

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?

Consider a full-duplex 512 kbps link with length 36,000Km connecting two hosts. The data frames carry a useful payload of size 6000 bits. Assume that both ACK and data frames have 400 bits of header information, and that ACK frames carry no data. The propagation speed along this link is 3×108 m/sec. a) What is the RTT on this link? b) What is the effective useful data throughput, in kbps, when using Stop-and-Wait?

6. Delays. A user in Madagascar, connected to the internet via a 100 Mb/s (b-bits) connection retrieves a 250 KB (B-bytes) web page from a server in Tokyo, where the page references three images of 500 KB each. Assume that the one-way propagation delay is 82 ms and that the user's access link is the bandwidth bottleneck for this connection. a. Approximately how long does it take for the page (including images) to appear on the user's screen, assuming non-persistent HTTP using a single connection at a time? (For this part, you should ignore queueing delay and transmission delays at other links in the network) How long does it take if the connection uses persistent HTTP (single connection)? b. c. Suppose that user's access router has a 4 MB buffer (B-byte) on the link from the router to the user. How much delay does this buffer add during periods when the buffer is full? d. Assume a cache rate of 45% on the information received by the user in Madagascar from the Tokyo server. How does…

a) Consider a CSMA/CD network running at 20 Mb/s over 3-km cable with no repeaters. The signal speed in the cable is 2×108 m/s. Suppose station A starts transmitting a frame of size 400 bytes at time T. i. Can it happen that station A detects a collision at time T+10 us (micro seconds) if there was no collision detected between time T and T+10 μs? Justify your answer. Can it happen that the station detects a collision at time T+20 μs, if there was no collision detected between time T and T+20 us? Justify your answer. iii. Can it happen that the station detects a collision at time T+33 μs, if there was no collision detected between time T and T+33 us?? Justify your answer.