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Q. Illustrate Diffrent types of modems?
There are four different types of modems: half-duplex, full-duplex, synchronous, and asynchronous.With half-duplex modems data can be transmitted in only one direction at a time. Full- duplex modems transmit data in both directions at the same time; one modem is designated as the originating modem and the other as the answering modem, while transmitting and receiving data are done at different frequencies. Asynchronous modems are low-data-rate modems transmitting serial data at a rate of about 1800 bits per second (bps). Synchronous modems are high-data-rate modems transmitting serial data at a rate of about 10,800 bps.
Modems can also be classified as voice-band or wide-band modems. Voice-bandmodems are low-to-high speedmodems designed for use on dial-up, voice-grade, standard telephone lines up to a rate of about 10,800 bps.Microprocessor-controlledmodems are known as smart modems, such as the Hayes modem, manufactured by Hayes Microcomputer Products. The portable acoustic- coupler device, which is a different type of voice-band modem, is a low-speed modem with a rate of about 600 bps that is connected acoustically to a standard telephone. Wide-band modems are very high-speed modems with rates of 19,200 bps and above, designed for use with dedicated telephone lines. These are currently used mostly on private communications systems.
ATM is an example of? ATM is illustration of Star topology.
The logic circuit shown in the given figure can be minimised to Ans. The minimised figure of logic diagram is D, the output of the logic circuit is as Y=(X+Y')'+(X'+(X+
1. Write the function makegrid. This function accepts a width and height and creates a grid/matrix of cells. The width gives the number of columns and the height the number of rows
In order to concatenate strings only for output purposes which command can be used in conjunction with the 'Write' statement. NO-GAP command.
Data Validation condition: The following condition stated below must be met for a data to be valid as is shown in the figure 3a below. 1. The data on the SDA line must remain stabl
Functional units of a computer system: Digital computer systems consist of 3 distinct units. These units are as follows: Central Processing unit Input unit and Output unit.
Q What do you mean by Directives? Assembly languages support numerous statements. This allows you to control the way in which a source program assembles and list. These stateme
What are program-invisible registers? Ans: the local and global descriptor tables are found in the memory system. To access and specify the address of these tables, program inv
What is LoadRunner
Make a class library and describe class 'User'. In User class describe the public, protected and Friend functions. Make a console application andadd a reference to this library and
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