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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.
A 5-bit DAC produces an output voltage of 0.2V for a digital input of 00001. Find the value of the output voltage for an input of 11111. What is the resolution of this DAC? Ans
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Q. Write short notes on proton - proton fusion in sun. Proton - Proton cycle 1 H 1 + 1 H 1 → 1 H 2 + 1 e 0 + ν (emission of positron as well as neutrino) 1
A sorting algorithm is stable if Preserves the original order of records with equivalent keys.
Face Scanning Security System - Biometric Computer Security Systems Finally, face scanning security system are also one of biometric technologies. Generally, the principle of
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State the term- Interviewing This involves a one to one question & answer session between analyst and customer/employee. A good method if analyst wants to probe deeply into on
Problem 1 (a) Explain the RAID system and explain all possible configurations. (b) Summarize design goals, features and specifications of the Linux ext2 file system. (c
Name the popular security measures A number of security products covering a broad range of methods are available in the market. Most popular of all the security measures are th
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