Answer:
1. Processor communication -- this involves the following tasks:
<em>a. exchange of data between processor and I/O module</em>
<em>b. command decoding - I/O module accepts commands sent from the processor. E.g., the I/O module for a disk drive may accept the following commands from the processor: READ SECTOR, WRITE SECTOR, SEEK track, etc. </em>
<em>c. status reporting – The device must be able to report its status to the processor, e.g., disk drive busy, ready etc. Status reporting may also involve reporting various errors. </em>
<em>d. Address recognition – Each I/O device has a unique address and the I/O module must recognize this address. </em>
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2. Device communication – The I/O module must be able to perform device communication such as status reporting.
3. Control & timing – The I/O module must be able to co-ordinate the flow of data between the internal resources (such as processor, memory) and external devices.
4. Data buffering – This is necessary as there is a speed mismatch between speed of data transfer between processor and memory and external devices. Data coming from the main memory are sent to an I/O module in a rapid burst. The data is buffered in the I/O module and then sent to the peripheral device at its rate.
5. Error detection – The I/O module must also be able to detect errors and report them to the processor. These errors may be mechanical errors (such as paper jam in a printer), or changes in the bit pattern of transmitted data. A common way of detecting such errors is by using parity bits.
The use of public wireless connections can increase a user's vulnerability to monitoring and compromise. <u>VPN </u> software can be used to encrypt transmissions over public networks, making it more difficult for a user's PC to be penetrated.
Explanation:
- A VPN, or Virtual Private Network, allows you to create a secure connection to another network over the Internet.
- VPNs can be used to access region-restricted websites, shield your browsing activity from prying eyes on public Wi-Fi, and more. .
- Virtual Private Network, is a private network that encrypts and transmits data while it travels from one place to another on the internet. VPNs aren't just for desktops or laptops, you can set up a VPN on your iPhone, iPad or Android phone.
- A VPN encrypts the traffic from your machine to the exit point of the VPN network. A VPN isn't therefore likely to protect you from an adversary like Anonymous.
- VPNs add another layer of encryption to your internet traffic, your latency will go up and speeds will go down.
Answer:
It can be "ON" or "OFF". So it can store the numbers 1 and 0, but it certainly doesn't have the capacity to store a letter of the alphabet.
Explanation:
