6.3A-3. Multiple Access protocols (3). Consider the figure below, which shows the arrival of 6messages for transmission at different multiple access wireless nodes at times t=0.1, 1.4, 1.8, 3.2,3.3, 4.1. Each transmission requires exactly one time unit.1t=0.02345t=1.0t-2.0t-3.06t=4.0t-5.0For the CSMA protocol (without collision detection), indicate which packets are successfullytransmitted. You should assume that it takes .2 time units for a signal to propagate from one node toeach of the other nodes. You can assume that if a packet experiences a collision or senses thechannel busy, then that node will not attempt a retransmission of that packet until sometime aftert=5. Hint: consider propagation times carefully here. (Note: You can find more examples of problems similar to this here B.]☐Uப5-31462

Given: Packet arrival times: t = 0.1, 1.4, 1.8, 3.2, 3.3, 4.1.Each transmission duration: 1.0 time…

Answered: 6.3A-3. Multiple Access protocols (3).…

Principles of Information Security (MindTap Course List)

6th Edition

ISBN:9781337102063

Author:Michael E. Whitman, Herbert J. Mattord

Publisher:Michael E. Whitman, Herbert J. Mattord

Chapter6: Security Technology: Access Controls, Firewalls, And Vpns

Section: Chapter Questions

Problem 2RQ

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Implement in Packet Tracer a network of a fictitious organization with the following characteristics: - The organization will be made up of 4 units: 3 local Ethernet networks + 1 remote Ethernet network (via the Internet)- Local dependencies must connect to each other through a Backbone (links) between Switches- There must be 2 VLANs in 2 local dependencies- Throughout the organization there must be 2 IP networks with 2 subnets each. The different IP networks must communicate with each other.- A static routing method or a dynamic routing method must exist- The remote unit must be integrated into some IP network through a VPN link- Each local office must have IP telephony (VoIP). At least one IP phone for each unit.- In each unit there must be at least 5 user PCs- Each PC must have Automatic IP configuration (DHCP)- DHCP, DNS and Web Servers must exist - All rooms must have access to the Internet through NAT-PAT- There must be a Wi-FI network in each unit
look at the two q please
Q4: What is the total delay (latency) for a frame of size 6 million bits that is being sent on a link with 5 routers each having a queuing time of 5 µs and a processing time of 2 µs. The length of the link is 3000 Km. The speed of light inside the link is 2 x 1018 m/s. The link has a bandwidth of 10 Mbps. Which component of the total delay is dominant? Which one is negligible?
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Consider an IP datagram being sent from node A to node C. Please answer parts D, E, F.
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.
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3. The figure below shows a network of four clients: A, B, C, and D, connected through a router, X. The transmission rate of each device and length of each link are shown on the figure. In addition, the processing delay of the router is 200ms. At t = 0, clients A, B, and C each send a packet of size 2 Mbits to Client D (through the router X). Assume that the propagation speed over all links is 2 x 108 m/s and the router's queue (buffer) is empty. Calculate the total delay for each packet until they are received at D. R₁ = 1 Mbits/s C B Rc=3 Mbits/s 4000 Km 4000 Km 4000 Km Processing delay = 200 ms R = 10 Mbits/s 6000 Km RB = 2 Mbits/s X D
P8. Consider a router that interconnects three subnets: Subnet 1, Subnet 2, and Subnet 3. Suppose all of the interfaces in each of these three subnets are required to have the prefix 223.1.17/24. Also suppose that Subnet 1 is required to support at least 60 interfaces, Subnet 2 is to support at least 90 interfaces, and Subnet 3 is to support at least 12 interfaces. Provide three network addresses (of the form a.b.c.d/x) that satisfy these constraints.
Computing Packet Transmission Delay. Suppose a packet is L = 3000 bytes long (one byte = 8 bits), and link transmits at R = 2 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 .000012 secs .0000015 secs 666,666 secs .0015 secs .012 secs Sorry, your answer isn't correct.

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