Exam 8: Modem and Other Remote Communications Devices

Describe how software flow control works.

Hardware flow control halts and resumes the movement of data by sending special characters.

communications of continuous bursts or blocks of data controlled by a clock signal that starts each burst or block of data

In Unix/Linux,you refer to the first modem on the computer using which of the following?

What task does the controller component in a modem perform?

When connecting to an analog modem using Windows XP,which of the following is a possible port name through which you communicate to the modem?

You have arrived at a customer site who is having problems using a modem attached to his Linux server. The GUI is not installed on the server. Which command can you use to verify and configure the modem?

Which of the following is NOT a component of an analog modem?

You are weighing the benefits of the major communications technologies. Your main concern is having a high bandwidth connection to the Internet. Which of the following technologies provides the highest bandwidth connections?

You have a laptop with a built-in analog modem. You are at a hotel and must connect to the company network with the modem. The hotel phone system requires that you dial a 9 before the phone number. You have found that it takes a second or two to get a dial-tone after you dial the 9. What command should be used on the modem to dial the number: 928-555-1932?

Analog modems are used in preference to digital technologies,even where digital technologies are widely available.

a digital modem device designed for use with the cable TV system providing high-speed data transfer.

Briefly describe the role of the UART in a modem.

the hardware or software portion of a modem that is responsible for converting digital data into analog signals for transmission over a telephone line

____________ uses digital communications over a communications line and has an aggregate data rate of 144 Kbps or 1.544 Mbps

a software flow control protocol that permits a receiving modem to notify the sending modem that its data buffers are full

a high speed technology that can use ordinary telephone lines for downstream transmissions speeds up to 8 Mbps and upstream speeds up to 1 Mbps

What protocol does a dial-up networking connection use to access the ISP for Internet communications?

A digital modem does not modulate/demodulate signals.

A desktop computer with a modem is called a ________ device because it prepares data to be transmitted.