Computers and Technology, 03.05.2021 17:10 Hahdhbd
You have been hired by a manufacturing company that has had its network in place for many years. They currently have 50 computers connected to 10 Mbps hubs. You've been asked to upgrade the network. This long-overdue upgrade is necessary because of poor network response time caused by a lot of collisions occurring during long file transfers between clients and servers. How do you recommend upgrading this network
Answers: 3
Computers and Technology, 22.06.2019 16:50
Consider a slotted aloha system, where the time slot equals the fixed duration of each packet. assume that there are 4 stations a,b,c,d sharing the medium. (a) stations a,b,c,d receive one packet each from higher layers at times 1.3, 1.5, 2.6,5.7 respectively. show which transmissions take place when, according to the slottedaloha protocol; describe all transmissions until all four packets have been successful.when needed, each station has access to the following sequence of random number, provided by a random number generator and drawn uniformly between 0 and 1: (1) station a draws numbers: 0.31, 0.27, 0.78, 0.9, 0.9, 0.11, 0. (2) station b draws numbers: 0.45, 0.28, 0.11, 0.83, 0.37, 0.22, 0. (3)station c draws numbers: 0.1, 0.2, 0.3, 0.4, 0. (4) station d draws numbers: 0.36, 0.77, 0.9, 0.1, 0.1, 0.1, 0.1, 0. (b) in slotted aloha, a station transmits in each time slot with a given probability. what probabilities would you assign to each of the four stations so as to: (i) maximize the efficiency of the protocol? (ii) maximize fairness among the four stations? (c) will the efficiency increase or decrease if we modify slotted aloha as follows: (i) get rid of slots and allow stations to transmit immediately? (ii) implement carrier sensing? (iii) implement collision detection? (iv) implement collision avoidance?
Answers: 3
Computers and Technology, 23.06.2019 11:00
Describe three characteristics of at-risk drivers. a. b. c. describe three characteristics of safe drivers. a. b. c. describe three driver errors that could cause a collision. a. b. c. how will this information affect you as a driver now and in the future? (2-3 sentences)
Answers: 2
Computers and Technology, 24.06.2019 12:30
Select all that apply. what two keys listed below should you use to enter data in an excel worksheet? tab backspace enter right arrow
Answers: 2
Computers and Technology, 25.06.2019 01:00
Holly created a professional development plan to explore how she could advance from her entry-level position to the next step in her career. she has identified her current skills and the skills needed for the job she wants. what should she do now? a) ask a colleague for advice about work-life balance b) identify her areas for improvement c) plan a vacation before she begins her new job d) wait until a position opens before continuing her plan
Answers: 1
You have been hired by a manufacturing company that has had its network in place for many years. The...
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