In a polling-based network receives, the operating system keeps checking the status register after a fixed time interval to see whether a device needs hardware attention or not. CPU gradually checks the status of receive bit after a defined time interval of a clock and if the value of receive bit is true then data is moved from the RX register to the memory. In interrupt-based networks, whenever a device needs hardware processing then an interrupt is raised to inform the CPU for device attention. The data of the device is transferred to memory from the network card.
Polling is a protocol, not a hardware mechanism where the device gets attention by CPU. An interrupt is a hardware mechanism, not a protocol where the device gets attention by the interrupt handler. In polling, during receiving, parts of received data need to transfer to memory but in case of interrupts, whole data is transferred at once after receiving is done. An interrupt is a heavy operation as compared to pooling because hardware involves in it. For large amounts of data, Polling becomes an inefficient method. In polling, CPU gradually checks devices at regular intervals whereas the Interrupt handler can send interrupt at any time. Each device has its own Command ready bit which indicates whether the device requires servicing or not. In polling, CPU wastes numerous clock cycles by repetitively checking the command-ready little bit of each device. In Interrupt based network, the interrupt request line indicates whether the device requires servicing or not. In interrupt-based network, CPU cycles not wasted but CPU is disturbed only when device send interrupt signals.
Relative performance between programmed I/O and DMA:
For determining the relative performance between programmed I/O and DMA, important factors are:
1. Size of data
2. Frequency of operations
A text editor can go good when coding HTML.
Answer:
internetwork
Explanation:
According to my research on information technology, I can say that based on the information provided within the question the type of network that should be implemented is called an internetwork. This refers to interconnecting different types of networks to build a large, global network" such that any pair of connected hosts can exchange packets.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
An Internet (C). because (A) is written wrong and there is nothing called extranet
Answer:
No, you really cannot tell.
Explanation:
Packets on a network are always taking different routes or paths. Based on the traffic, the router will choose the best path to send packets to. For instance, if the network experiences redundancies or network congestion between the host and destination devices, additional paths will always be available. Unless we have manually configured proxies, we will never tell in advance the path a message will take. Internet routes are dynamic in nature especially since they are based upon traffic loads among other factors
