Answer:
When you move into a new home or apartment, the first thing on your checklist should be to have the <u>locks</u> changed
Explanation:
Changing the locks
Given that the way the previous owners of the new home or apartment made use of the locks and the keys are usually not completely known to the new owners, one may never know all those that have a key or a means to gain access into the apartment or home. Therefore, in order to guarantee proper security, it is a good practice to have as one of the first thing on the checklist, the changing of the locks of the entrance doors and windows of the new home or apartment.
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
Answer:
Exponential.
Explanation:
The router is a network device that route packets to its destination through a path on its routing table. The routing table contains the path to the next hop count of the destination network. A path or route could be learnt statically or dynamically.
Static routes are learnt based on direct connection to other router or a hard coded path configuration. A dynamic route is learnt through a routing protocol. RIP, EIGRP, OSPF, IS-IS are examples of routing protocols.
The OSPF or open shortest path first is a protocol that uses algorithm, load cost and other metrics to determine paths for packets. The exponential algorithm is used by the OSPF to determine the shortest and noise-free path to a destination.
[] Answer []
A phrase containing figurative language in which the word expresses a different idea from its exact meaning
[] Explanation \ Reasoning []
Idiom Example: "Break A Leg"
This is an idiom because it is figurative language that doesn't exactly mean what it says. The person saying "Break a leg" just means do really good that you'll "break a leg". In reality, we don't actually want you to break a leg. We just mean it figuratively.
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