6.3B-3. Multiple Access protocols (3). Consider the figure below, which shows the arrival of 6 messages for transmission at different multiple access wireless nodes at times t=0.1, 0.8, 1.35, 2.6, 3.9, 4.2. Each transmission requires exactly one time unit. t=0.0 1 0 0 1 2 3 4 For the CSMA protocol (without collision detection), indicate which packets are successfully transmitted. You should assume that it takes .2 time units for a signal to propagate from one node to each of the other nodes. You can assume that if a packet experiences a collision or senses the channel busy and that that node will not attempt a retransmission of that packet until sometime after t=5. Hint: consider propagation times carefully here. 5 2 3 9 t-1.0 t=2.0 4 t-3.0 56 t=4.0 t=5.0

6.3B-3. Multiple Access protocols (3). Consider the figure below, which shows the arrival of 6 messages for transmission at different multiple access wireless nodes at times t=0.1, 0.8, 1.35, 2.6, 3.9, 4.2. Each transmission requires exactly one time unit. t=0.0 1 0 0 1 2 3 4 For the CSMA protocol (without collision detection), indicate which packets are successfully transmitted. You should assume that it takes .2 time units for a signal to propagate from one node to each of the other nodes. You can assume that if a packet experiences a collision or senses the channel busy and that that node will not attempt a retransmission of that packet until sometime after t=5. Hint: consider propagation times carefully here. 5 2 3 9 t-1.0 t=2.0 4 t-3.0 56 t=4.0 t=5.0

Comptia A+ Core 1 Exam: Guide To Computing Infrastructure (mindtap Course List)

10th Edition

ISBN:9780357108376

Author:Jean Andrews, Joy Dark, Jill West

Publisher:Jean Andrews, Joy Dark, Jill West

Chapter8: Network Infrastructure And Troubleshooting

Section: Chapter Questions

Problem 8TC

See similar textbooks

Similar questions

An Internet user would like to transfer a message from his computer (host A) to another computer (host B). The size of the message passed to the IP layer is 3800 bytes. The datagram(s) carrying the message will have to cross two routers (R1 and R2) and 3 networks (NET1, NET2, and NET3) as described in the above figure. Each of these networks has a specific MTU (for example the MTU of network 1 is 1500 bytes. MTU here stands for Maximum Transmission Unit, the largest data that a frame can carry). Fill the table with the IP datagram(s) needed right after passing through NET3 (no need to show your fragmentation for N1 or N2). Assume a 2-byte options in the header. Show all your details (for partial points in case your numbers are incorrect). NET1 MTU=1500 R1 NET2 MTU=640 R2 NET3 MTU 1500 V BIU Fragment # Format Offset Flag (3 bits) Data Length Total Length ...
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. d. Suppose host A begins to transmit the packet at time t= 0, at time t=dtrans, where is the last bit of the packet?e. Suppose dprop is greater than dtrans. At time t =dtrans, where is the first bit of the packet? f. Suppose dprop is less than dtrans. At time t =dtrans, where is the first bit of the packet?g. Suppose s = 2.5 x 108 , L=100 bits, and R=28 Kbps. Find the distance m so that dprop = dtrans.
MULTIPLE ACCESS PROTOCOLS: COLLISIONS Consider the figure below, which shows the arrival of 12 messages for transmission at different multiple access wireless nodes at times t = and each transmission requires exactly one time unit. t=0.0 Answer t=1.0 3 45 8 t=2.0 t=3.0 10 11 t=4.0 QUESTION 1 OF 2 Suppose all nodes are implementing the Slotted Aloha protocol. For each message, indicate the time at which each transmission begins. Separate each value with a comma and no spaces. t=5.0
MULTIPLE ACCESS PROTOCOLS: COLLISIONS Consider the figure below, which shows the arrival of 12 messages for transmission at different multiple access wireless nodes at times t = and each transmission requires exactly one time unit. t=0.0 Answer t=1.0 3 NA € t=2.0 . t=3.0 2 t=4.0 QUESTION 1 OF 2 Suppose all nodes are implementing the Aloha protocol. For each message, indicate the time at which each transmission begins. Separate each value with a comma and no spaces. 12 t=5.0
Suppose, we have a network which is consists of two layer-2 switch, one layer-3 switch and two end devices. If we want to transfer data from this network to another established network which is consists of router, switch and end devices, can it be possible? Explain
A pipelined reliable transfer protocol has a window size of N segments and runs over a link with bandwidth R=100Mbps. The link has a propagation delay t_prop=300ms. Each data packet sent over the link is of size L_D=5kBytes, whereas acknowledgements are of size L_A=50Bytes. Answer the following questions and show your work where indicated. A. What is the achieved throughput of the above pipelined protocol for N=4, 8 and 16? B. What is the link utilization for N=4, 8 and 16? Note that in class, we calculated the link utilization in terms of the time the sender is busy sending. We can also do this in terms of the achieved vs. available throughput. C. Will the achieved throughput of the above pipelined protocol grow or shrink if the packet size was increased? D. Will the achieved throughput of the above pipelined protocol grow or shrink if the propagation time was increased? E. Will the achieved throughput of the above pipelined protocol grow or shrink if the transmission rate of the link…
In the figure below a router is transferring packets, each of length L= 5 000 bits over a link with a transmission Rate R= 1 Mbps to another router at the other end of the link. The speed prorogation of the light signal on the link is 3x108 m/s. The length of the link is 1 Km. L: packet length (in bits) R: link transmission rates (Mbps) Queue of packets waiting for output link 1-Calculate the total transmission delay. 2- How many packets can be transmitted in one second.
This elementary problem begins to explore propagation delay andtransmission delay, two central concepts in data networking. Consider two hosts, Aand B, connected by a single link of rate R bps. Suppose that the two hosts areseparated by m meters, and suppose the propagation speed along the link is smeters/sec. Host A is to send a packet of size L bits to Host B. d. Suppose Host A begins to transmit the packet at time t=0 . At time t= ?????? ,where is the last bit of the packet? e. Suppose ????? is greater than ?????? . At time t= ??????, where is the first bit of the packet?f. Suppose ????? is less than ??????. At time t= ?????? , where is the first bit of thepacket?
Consider this multihpop network running the 802.11 MAC protocol in ad-hoc mode (RTS-CTS-DATA-ACK) and a link speed of 1 Mbps: A === B === C === D Edges ‘===’ represent connectivity, so, for instance, nodes B and C can communicate with each other directly, but A and C cannot. All nodes are able to route packets on behalf of the other nodes and they employ store-and-forward to deliver packets to the destination. Suppose nodes A, B, and C have to send a lot of data frames to node D and have their link layer queue always full. What is the average data rate for A, B, and C assuming no DATA frames get lost due collisions? Explain your answer. Compare the data rates with the link rate.
Computing Packet Transmission Delay. Suppose a packet is L = 1200 KB long (one byte = 8 bits), and link transmits at R = 100 Mbps. What is the transmission delay for this packet? L: packet length (in bits) R: link transmission rates (Mbps) Queue of packets waiting for output link .000096 secs .0012 secs 8,333 secs .096 secs .000015 secs Sorry, your answer isn't correct.
Suppose a single 802.11n client is connected to an 802.11n access point and there is no other client or access point in the neighborhood. The client senses the medium, then sends an 1,337-Byte frame, and waits for an 132-byte acknowledgement from the AP, and then repeats the process. The data rate on the wireless link is 400 Mbps. Assume DIFS=47 μs and SIFS =11 μs, no propagation delay and no error. Calculate the throughput for this client in Mbps. Calculate up to 1 decimal point.