Answer:Packet and circuit switching
Explanation: Packet switching is the technique through which the data is sent from the source to destination in the form of data packets on dynamic path.It is the time of connectionless switching and route generates for each packet.
Circuit switching is the switching technique having connected path for the sending and receiving of the data.They have well defined and established path for the transmission of data.
Other options are incorrect because they define the terms that are associated with the data that gets transmitted like bandwidth,transmission rate ,packet etc. These options are not the way in which data transmitted or switched.Thus, the correct option is packet and circuit switching.
1. It is based on scientific and technological advancements.
2. It is more a practical discipline and less a theoretical one.
3. It is a fast growing modern discipline.
4. It makes use of the research findings of psychology, sociology, engineering, sciences and social psychology etc., and applies the same to the field of education.
5. It brings pupils, teachers and technical means together in an effective way.
6. It is the science of techniques and methods. It locates the problems in the field of education, remedies them and ultimately aims at improving the education system.
7. It is bound to improve the teacher, the learner and the teaching learning process.
<span>University of California, Berkeley _ comp sci
De Anza College, _ comp sci</span>
Answer:
Although some devices can be controlled using nothing but their I/O regions, most real devices are a bit more complicated than that. Devices have to deal with the external world, which often includes things such as spinning disks, moving tape, wires to distant places, and so on. Much has to be done in a time frame that is different from, and far slower than, that of the processor. Since it is almost always undesirable to have the processor wait on external events, there must be a way for a device to let the processor know when something has happened.
That way, of course, is interrupts. An interrupt is simply a signal that the hardware can send when it wants the processor's attention. Linux handles interrupts in much the same way that it handles signals in user space. For the most part, a driver need only register a handler for its device's interrupts, and handle them properly when they arrive. Of course, underneath that simple picture there is some complexity; in particular, interrupt handlers are somewhat limited in the actions they can perform as a result of how they are run.
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