Used to provide reliable transport 1) alternating bit protocol (abp) and retransmission timers are of segments. the figure below shows a time sequence diagram of abp and retransmission a b data. req(a) d(0,a) data. ind(a) c(oko) data. req(b) d(1, b) retransmission timer d(1,b) data. ind(b) c(ok1) duplicate detected c(ok1) data. req(c) d(0, c) retransmission timer d(o, c) data. ind(e) timers being implemented. explain how retransmission timers and the alternating bit protocol work. considera link connecting two host at 10 mbits/secwith a propagation delay between each host of 250ms. if the hosts send 1000 bit segments, what is the maximum a. b. throughput, if alternating bit protocol is being implemented? why is this bad?

Which of the following has not been attributed at least in part to social media a. drug addiction b. depression c. kidnapping d. murder

Write a program that displays the following menu: geometry calculator 1. calculate the area of a circle 2. calculate the area of a rectangle 3. calculate the area of a triangle 4. quit enter your choice (1-4): if the user enters 1, the program should ask for the radius of the circle and then display its area. use the following formula: area = ď€(the square of r) use 3.14159 for ď€ and the radius of the circle for r. if the user enters 2, the program should ask for the length and width of the rectangle and then display the rectangle’s area. use the following formula: area = length * width if the user enters 3, the program should ask for the length of the triangle’s base and its height, and then display its area. use the following formula: area = base * height * .5 if the user enters 4, the program should end. input validation: display an error message if the user enters a number outside the range of 1 through 4 when selecting an item from the menu. do not accept negative values for the circle’s radius, the rectangle’s length or width, or the triangle’s base or height. note: if the user enters an improper menu choice (1-4), the program prints "the valid choices are 1 through 4. run the program again and select one of those." if the user enters a negative radius, the program prints "the radius can not be less than zero." if the user enters a negative value for height or base, the program prints "only enter positive values for base and height."

Select the correct answer sarah wants to use a device to input signatures on electronic documents. which input device will be most suitable for her? a digital pen b. laser pen c keyboard d. touchscreen reset next