When an ethernet frame arrives at a computer, the ethernet layer must hand the packet that it contains to the next higher layer to be processed. the act of finding the right higher layer to pro-cess received packets is called demultiplexing. we know that in our case the higher layer is ip. but how does the ethernet protocol know this? after all, the higher-layer could have been another protocol entirely (such as arp). we have the same issue at the ip layer – ip must be able to deter-mine that the contents of ip message is a tcp packet so that it can hand it to the tcp protocol to process. the answer is that protocols use information in their header known as a "demultiplexing key" to determine the higher layer. o true o false

Based on the current economic situation do you expect the employment demand for graduating engineers to increase or decrease? explain the basis for your answer. with a significant economic recovery, what do you think will happen to future enrollments in graduating engineering programs?

When making changes to optimize part of a processor, it is often the case that speeding up one type of instruction comes at the cost of slowing down something else. for example, if we put in a complicated fast floating-point unit, that takes space, and something might have to be moved farther away from the middle to accommodate it, adding an extra cycle in delay to reach that unit. the basic amdahl's law equation does not take into account this trade-off. a. if the new fast floating-point unit speeds up floating-point operations by, on average, 2ă—, and floating-point operations take 20% of the original program's execution time, what is the overall speedup (ignoring the penalty to any other instructions)? b. now assume that speeding up the floating-point unit slowed down data cache accesses, resulting in a 1.5ă— slowdown (or 2/3 speedup). data cache accesses consume 10% of the execution time. what is the overall speedup now? c. after implementing the new floating-point operations, what percentage of execution time is spent on floating-point operations? what percentage is spent on data cache accesses?

Afashion designer wants to increase awareness about her brand. which network can she use and why she can use the blank to blank her products online. answers for the first blank: internet, extranet, or intranet answers for the second blank: market, design, and export