Methods of Communication:

The EIA-232 interface cable comes in a -conductor and a _-conductor cable.

(a)  

db 9 connector

(a)  

The most common connection used to connect DTE to DCE is an

(a)  

degrades or interferes with transmitted information

(a)  

is a collection of electronic components and circuits that converts the electrical signal into a signal suitable for transmission over a given medium.

(a)  

is the medium by which the electronic signal is sent from one place to another.

(a)  

Data = high, Clock = low:

(a)  

Data = low, Clock = high:

(a)  

The clock is embedded in the data stream encoding, or provided on separate clock lines such that the sender and receiver are always in synchronization during a frame transmission. Most modern WAN framing is built on the

(a)  

field is usually one byte, but may be more. It is used to indicate the sender or intended receiver of the frame. It is possible to have multiple stations connected to a single wire, and to design the system so that each receiver only "sees" frames with its own address. By this means multiple stations can communicate with each other using just one line

(a)  

is an expression of the number of data bits per second. Where a binary signal is being used, this is the same as the baud rate.

(a)  

is the transmission of data from one location to another.

(a)  

transmitted can be numeric or alphabetic.

(a)  

ASCII

(a)  

ascii of G

(a)  

ascii of 7

(a)  

ascii of w

(a)  

EBCDIC

(a)  

is the same as symbol rate and is a measure of the number of line changes which occur every second.

(a)  

Types of media

is a collection of electronic components and circuits that accepts the transmitted message from the channel and converts it back into a form understandable by humans.

(a)  

Receivers contain _____and_, that recovers the original intelligence signal from the modulated carrier.

The system must deliver data in a timely manner. Data delivered late are useless. In the case of video and audio, timely delivery means delivery data as they are produced, in the same order that they are produced, and without significant delay.

(a)  

The equipment used to connect a DTE to the PSTN (Public Switched Telephone Network) is called

(a)  

The PC belongs to a category of equipment called

(a)  

refers to the variation in the packet arrival time. It is the unseen delay in the delivery of audio or video packets. For Example, let us assume that video packets are sent every 3D ms. If some of the packets arrive with 3D-ms delay and others with 4D-ms delay, an uneven quality in the video is the result.

(a)  

is an electronic unit that incorporates circuits that both send and receive signals.

(a)  

is random, undesirable electronic energy that enters the communication system via the communicating medium and interferes with the transmitted message.

(a)  

The system must deliver the data accurately. Data that have been altered in transmission and left uncorrected are unusable.

(a)  

The PS/2 mouse and keyboard implement a bidirectional synchronous serial protocol. The device (slave) always generates the clock signal. If the host wants to send data, it must first inhibit communication from the device by pulling Clock low. The host then pulls Data low and releases Clock.

(a)  

Types of Electronic Communication

(a)  

makes the information signal more compatible with the medium.

(a)  

allows more than one signal to be transmitted concurrently over a single medium.

(a)  

The process of altering a characteristic of the carrier signal in accordance with the instantaneous value of the modulating signal to make it suitable for transmission over a given channel.

(a)  

Because no signal lines are used to convey clock (timing) information, this method groups data together into a sequence of bits (five to eight), then prefixes them with a start bit and a stop bit. This is the method most widely used for PC or simple terminal serial communications

(a)  

Carrier characteristics to be varied:

(a)  

In asynchronous serial communication, the electrical interface is held in the position between characters. The start of transmission of a character is signaled by a drop in signal level to the _ level.

(a)  

Thus the transmitter and receiver only have to have approximately the _ clock rate.

(a)  

is the process of allowing two or more signals to share the same medium or channel.

(a)  

The three basic types of multiplexing are:

is type of transmission that is using current to send signal over the wire as digital wave. It can transmit only one signal at a time, due to requirement of the exclusive use of the wire. This type of transmission is allowing only on device to transmit in the network at one time, while other devices need to wait for the end of transmission.

(a)  

is using analog signal that is modulated. It is used to transmit cable TV to premises. Broadband is using different frequencies which increases amount of data it can carry at one time.

(a)  

is a high frequency signal that is modulated by audio, video, or data.

(a)  

is an electromagnetic signal that is able to travel long distances through space.

(a)  

Device called _ translate the data from digital to analog and back again.

(a)  

takes place in the receiver when the original baseband signal is extracted.

(a)  

The range of electromagnetic signals encompassing all frequencies is referred to as the

(a)  

is the number of cycles of a repetitive wave that occur in a given period of time.

(a)  

is the distance occupied by one cycle of a wave and is usually expressed in meters.

(a)  

Frequency of ELF?

(a)  

Frequency of VF

(a)  

Frequency of VLF

(a)  

Frequency of LF

(a)  

Frequency of MF

(a)  

Frequency of HF

(a)  

Frequency of VHF

(a)  

Data = high, Clock = high:

(a)  

Frequency of UHF

(a)  

Frequency of SHF

(a)  

Frequency of EHF

(a)  

install, troubleshoot, repair, calibrate, and maintain equipment.

(a)  

assist in equipment design, testing, and assembly

(a)  

determine customer needs and related specifications, write proposals and sell equipment.

(a)  

develop programs, generate training and presentation materials, and conduct classroom training

(a)  

The communication electronics industry is made up of the following segments:

(a)  

generate technical documentation for equipment and systems

(a)  

AM radio frequency

(a)  

is a telecommunications network that allows computers to exchange data. In computer networks, networked computing devices pass data to each other along data connections.

(a)  

Three types of light waves are:

(a)  

is produced by any physical equipment that generates heat, including our bodies.

(a)  

low-frequency or long-wavelength light

(a)  

The effectiveness of a data communications system depends on four fundamental characteristics. (put comma)

(a)  

high-frequency or short-wavelength light.

(a)  

is the transfer of data from point to point often represented as an electromagnetic signal over a physical point-to-point or point-to-multipoint communication channel.

(a)  

is that portion of the electromagnetic spectrum occupied by a signal.

(a)  

refers to the range of frequencies required to transmit the desired information.

(a)  

The simplest error-checking method is

(a)  

five types of parity

(a)  

Parity checking provides an end-to-end check (PC to PC) on each byte transmitted between two PCs, but no error checking is performed.

(a)  

after sending a block of data, the transmitting end will wait for a signal from the receiving end before sending another block of data.

(a)  

Physical Transmission Media: A example of tangible media

(a)  

Wireless Transmission Media example

(a)  

eliminates the need for the transmitting modem to wait for an ACK or NAK on each block of data sent.

(a)  

Straight-through Cable color coding

(a)  

crossover cable eia 568A color coding

(a)  

Today, virtually the entire frequency spectrum between approximately _ kHz and _ MHz has been spoken for.

(a)  

crossover cable eia 568 b

(a)  

design communication equipment and systems.

(a)  

is provided by agencies set up by the United States and other countries to control spectrum use.

(a)  

are specifications and guidelines necessary to ensure compatibility between transmitting and receiving equipment.

(a)  

analog signal - analog transmitter - analog signal

(a)  

digi or analog signal - digital transmission - digi or analog signal

(a)  

digi signal - digital or analog transmission - digi signal

(a)  

The rules of communication are also known as

(a)  

The term _ means communication at a distance. The word data refers to information presented in whatever form is agreed upon by the parties creating and using the data.

(a)  

are the exchange of digital data between two or more devices (computers) via some form of transmission medium such as a wire cable.

(a)  

For data communications to occur, the communicating devices must be part of a communication system made up of a combination of

(a)  

data to the correct destination. Data must be received by the intended device or user and only by that device or user.

(a)  

a separate line is used as a clock signal. This serves to inform the receiver when data is available.

(a)  

Each bit is sent over a single wire, one after the other, Usually no signal lines are used to convey clock

(a)  

is obviously faster, in that all bits are sent at the same time

(a)  

The "payload" of the frame is the _.

(a)  

field is one or more bytes. It contains information on the type of frame (for instance, whether this is a frame containing user data or a supervisory frame which performs some sort of link control function). It also often contains a rotating sequence number that allows the receiver to check that no frame has been lost.

(a)  

A computing industry standard allowing computers to consistently represent and manipulate text expressed in most of the world's writing systems.

(a)