Suppose N packets are sent, and each packet arrives at rate of L/2R to a link. Suppose the first packet
arrives to a link at which no packets are being currently transmitted or queued. Each packet is of length L and the link has a transmission rate R. What is the average queuing delay for the N packets?
Suppose N packets are sent, and each packet arrives at rate of L/2R to a link....
Suppose N packets arrive simultaneously to a router at which no packets are currently being transmitted or queued. Each packet is of length L and the link has transmission rate R (simple proof is needed). 1) What is the transmission time for the last packet? Solution: 2) What is the queue delay for the 4th packet? — Solution: 3) What is the average queue delay for the first three packets? Solution: 4) What is the average transmission delay for the...
Computer Network Performance (20 Points) Suppose N packets arrive simultaneously to a router at which no packets are currently being transmitted or queued. Each packet is of length L and the link has transmission rate R (simple proof is needed). 1111 Font Family . Format B I u 1) What is the transmission time for the last packet? Solution: 2) What is the queue delay for the 4th packet? Solution: 3) What is the average queue delay for the first...
Suppose that N packets are in the queue of a router, and that the router is transmitting a packet. Suppose also that x bits of the currently-being-transmitted packet has been transmitted. Assume that all packets are composed of L bits, and that the output link of the router has a transmission rate of R bits/sec. What is the queuing delay of the Nth (last) packet in the queue of the router?
3. Suppose there is exactly one packet switch (or router) between a sending host and a receiving host. The transmission rates between the sending host and the switch and between the switch and the receiving host are R1 = 1Mbps and R2 = 2Mbps, respectively. Assuming that the switch uses store-and-forward packet switching, what is the total end-to-end delay to send a packet of length 18000bits? Assume that the propagation speed is 2 * 108 meters/sec, the distance between source...
Questions: 1. (15pt.) Suppose that a file of 10 bytes is transferred between two hosts, and packet size is 10 bytes. Assume packets are sent back-to-back with no overhead of encapsulation. Calculate the file transmission latency (from first bit sent to last bit received) for (a) Single store-and-forward 1-Gbps switch is in the path, each link introduces a propagation delay of lus, and either queucing or processing delay can be omitted (b) Same as (a) but with three switches; (e)...
Given three packets of size 1500 bytes each are ready inside Computer 1 to be transmitted onto Link 1. Computer 1 has zero processing delay. Assume each router has zero queuing and zero processing delay. Link 1 is a 10 Mbit/sec link and 5000 km long. Link 2 is 100 Mbits/sec and is 5000 km long. Link 3 is 1000 Mbits/sec and is 5000 km long. Propagation speed is 2 × 10 8 m/s. Assume a router has to receive...
Problem 2 For a given network, the average packet length L = 1024 bytes, packets are arriving with an average rate = 8 pakets/s, the network is used to support voice call services which can tolerate a maximum end-to-end delay of 150 ms, the average end-to-end distance between any two connected nodes in the network is 1000 km, the average phase velocity for signal travelling throughout the network links is 0.1 speed of light in free space and the call...
Suppose that Router A and Router B are connected via a 10 Kbps link, and that the two routers are 20 meters apart. Suppose that Router A is transmitting a packet, and that there are 7 additional packets in the queue of the router, when a new packet arrives at Router A. Suppose that 500 bits of the currently-being-transmitted packet has been transmitted by Router A. Also, assume the following a. Every packet consists of 1000 bits. b. Propagation speed...
A 1198 byte fle needs to be transmitted using the following packet switching network with the data rate on each link R 17 kbps. Assume that the packets are transmitted one after another without waiting for any acknowledgements from the receiver. Once whole packets are received at the intermediate router they are transmitted immediately on the outgoing link. Assume that this network use a packet size of 101 bytes, of which 20 bytes are headers. How many packets are required...
Transmission Delay
Consider sending N packets each of length L bits from Host A to
Host B, as shown in the figure below. Assume that the links between
Host A and the Router and between the Router and Host B each has a
transmission rate of R bits per second. Assume all buffers are of
infinite capacity. Ignore all processing and propagation
delays.
a) Express the delay it takes to send 2 packets
from A to B as a function...