Answer:
To avoid collision of transmitting frames.
Explanation:
CSMA/CA, carrier sense multiple access is a media access control protocol of wireless networks that allows for exclusive transmission of frames and avoidance of collision in the network. When a frame is not being sent, nodes listening for an idle channel gets their chance. It sends a request to send (RTS) message to the access point. If the request is granted, the access point sends a clear to send (CTS) message to the node, then the node can transmit its frame.
Many nodes on a wireless network are listening to transmit frames, when a frame is transmitting, the node has to wait for the access point to finish transmitting, so it sends a RTS message again to exclusively transmit a second frame.
Answer:
Array: (a) All the messages a user has sent.
Variable: (b) The highest score a use has reached on the app. (c) A username and password to unlock the app.
Explanation:
An array generally has more than one value whereas a variable can only contain a single value at any particular point in time. In addition, a variable has a limit whereas an array does not have any maximum limit. Therefore, it can be concluded that option (a) will be stored as an array while options (b) and (c) will be stored as variables.
Answer:
We can run multiple programs on windows simultaneously. There is no specific limit to run the programs.
Explanation:
We can run multiple application at the same time without having any limit.
<u>Microprocessor</u>
Microprocessor is the essential part of the computer. It is used to perform arithmetic and logic operations. The microprocessors are multitasking, its means that they can perform multiple tasks at the same time. It gives breaks all tasks into small portions and gives equal time to all process portions equally.
<u>Windows</u>
There is scheduler in windows that schedule all tasks for processing on priority basis. This will help computer to perform multiple task at the same time.
As computers have microprocessors that are used to process multiple application at the same time.
Answer:
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