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>
<em />
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.
Answer:
Popular Electronics is the correct answer.
Explanation:
It is the first magazine that released in the year 1975, Jan. The following magazine is about the initial microcomputer kit which for the Mits Altair.
So, that's why the following answer is not false because it is the first magazine that released the article about the following microcomputer kit that is update on the cover of the magazine.
Answer:
"backdoor" is the correct answer for the above question
Explanation:
- The backdoor is a type of attack which is done by the type of backdoor programs to remotely access the computers without the authorization of the user of the computer.
- It is inserted on the computer with the help of the internet and accessed the computer without using authorization techniques.
- The above question asked about the virus which is used to access the computer without the permission of the right use of the system. Hence the answer is backdoor which is defined above.
Answer: DAP stands for directory access protocol .It is a protocol that is used for accessing the information from the directory of X.500 protocol.
LDAP(Lightweight directory access protocol) is the software protocol that is present for the simplification process of the X.500 protocol and to make it light-weighted .It is basically a version of DAP in a lightweight form.
