MIS 140 Exam 1 Review TF
The medium is the physical matter or substance that carries the voice or data transmission.
True
The predominant method of transferring information internally in a computer is via parallel mode.
True
The simplest method for error correction is retransmission.
True
The two functions of middleware are to: 1) provide a standard way of communicating that can translate between software from different vendors, and 2) manage the message transfer between clients and servers so that clients do not need to 'know' which server contains the application's data.
True
Time division multiplexing is more efficient that frequency division multiplexing because the guardbands used in the frequency division multiplexing or not needed.
True
Token passing is a term that refers to hub polling, in which one computer starts a poll and passes it to the next computer on a multipoint circuit.
True
Undesirable stray electrical voltage can cause data communication errors.
True
WDM is a version of FDM used in fiber-optic cables.
True
Web-based e-mail like Hotmail is an example of three-tier client-server architecture that provides access to e-mail messages.
True
When the signals from two circuits combine to form a new signal that falls into a frequency band reserved for another signal, this is called intermodulation noise.
True
When we amplify the signal on an analog circuit, we also amplify any noise that is present on the circuit.
True
With roll-call polling, a server polls clients in a consecutive, pre-arranged priority list.
True
All three parts (request line, request header, request body) of an HTTP request from a web browser to a web server are required when a request is made.
False
An application architecture is the way in which the functions of the application layer are performed solely by the clients in the network.
False
Another term for stop-and-wait ARQ is sliding window.
False
As the demand for more and more network applications grow; host-based computing becomes the best solution.
False
Based on the TIA/EIA 568-B structured cabling standard, the cabling that runs from the telecommunications closet to each work area is called backbone cabling.
False
Baud rate is the number of bits transmitted per second.
False
Coaxial cable costs less and offers less shielding to electrical interference than twisted pair cable.
False
Data transmission errors are typically uniformly distributed in time.
False
Digital transmission occurs when the signal sent over the transmission media constantly varies among an infinite number of states.
False
Digital transmission produces more errors than analog transmission.
False
Fiber optic cable can only be used on LANs.
False
Fiber optic cable carries signals in traditional electrical form.
False
Frequency division multiplexing divides the circuit into a set of different time slots.
False
Frequency modulation refers to the changing of the height of the sound wave.
False
Gaussian noise is a special type of attenuation.
False
Guided media refers to the type of media in which the message is broadcast through the air.
False
Host-based and client-based networks are similar in that the client computer performs most of the work.
False
Impulse noise is caused by the thermal agitation of electrons.
False
In a multipoint circuit configuration, each computer can use the circuit at the same time.
False
In a multipoint circuit configuration, each computer has a dedicated circuit between itself and each of the other computers in the network.
False
In an odd parity-checking scheme, the parity bit is set to make the total number of ones in the byte (including the parity bit) an even number.
False
In simplex transmission, the data flows in both directions at the same time
False
Most computer networks managed by a host mainframe computer use contention media access control.
False
Multimode fiber is capable of longer transmission distances than single mode fiber.
False
Multiplexing increases the cost of provisioning network circuits.
False
Multitasking means to break one high-speed physical communication circuit into several lower-speed logical circuits so that different devices can simultaneously use it.
False
Nonreturn to zero is a type of unipolar signaling
False
Only the sender of a data transmission needs to be concerned about the rules or protocols that govern how it communicates with the receiver.
False
Parity checking can only detect an error when an even number of bits are switched.
False
Propagation delay is negligible with satellite transmission.
False
Radio, microwave and satellite are all examples of guided media.
False
Serial mode transmission is much faster than parallel mode transmission.
False
The Simple Mail Transfer Protocol is the least commonly used e-mail standard.
False
The World Wide Web was conceived at University of Utah as part of the development of the Internet.
False
The amount of time it takes to switch between sending and receiving in half-duplex transmission is called the propagation delay.
False
The application architecture called the distributed computing model uses the "thick" client approach.
False
The distance between repeaters or amplifiers on a telephone circuit is determined by the amount of power gained per unit length of the transmission.
False
The earliest data communications networks were client-server networks.
False
The standard protocol for communication between a Web browser and a Web server is the web protocol.
False
The two categories of network errors are: lost data and delimited data.
False
The two-tier e-mail architecture does not require any application software on the client computer.
False
To use the Web, each client computer requires a data link layer software package called a Web browser.
False
Transmission efficiency refers to the percentage of bits transmitted without errors.
False
Using the POP standard for client to server e-mail communication, the e-mail messages remain on the server computer.
False
Wavelength division multiplexing can only used with copper cables.
False
With contention, a computer does not have to wait before it can transmit. A computer can transmit at anytime.
False
With modem communications, the receiving modem converts the incoming digital signal from the telephone line into an analog signal that can be understood by the computer.
False
With nonreturn to zero signaling, the voltage alternates between zero and a positive or negative voltage.
False
12. At the transport layer in the Internet model, TCP is responsible for breaking large files received from the application layer into smaller messages and opening a connection to a server for transferring them.
True
14. Data communication standards enable each layer in the sending computer to communicate with its corresponding layer in the receiving computer.
True
15. The specification stage of the de jure standardization process consists of developing nomenclature and identifying the problems to be addressed.
True
16. ANSI is a voting participant in the ISO.
True
2. Due to advances in high speed communication networks, the information lag, or the time it takes for information to be disseminated around the world, has been significantly shortened.
True
3. It is not uncommon for companies to end up spending more money on network management and security tasks than they do on the actual computer equipment itself.
True
4. Telecommunications is the transmission of voice and video as well as data and usually implies transmitting a longer distance than in a data communication network.
True
7. A car manufacturer may give access to certain portions of its network to some of its suppliers via the Internet. This is an example of an extranet.
True
9. The network layer performs the same functions in both the OSI and Internet models and is responsible for routing messages from the source computer to the destination computer.
True
A server farm is a group of computers that are linked together so they act as a one computer.
True
A walkie-talkie is an example of half-duplex transmission.
True
Amplitude, frequency and phase are all characteristics of a sound wave.
True
Attenuation refers to the loss of signal strength.
True
Cloud-hosted virtual desktops are now available through a service called DaaS allowing users to access the same client computer (virtual desktop) from any computer and any location.
True
Coding schemes are groups of bits that translate into the "alphabet" of any given system.
True
Computers produce digital data whose values are binary: 0 or 1.
True
Contention is commonly used with Ethernet local area networks.
True
Controlled access MAC approaches work better in a large network with high usage.
True
Crosstalk occurs when the signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel.
True
Cyclical redundancy check is one of the most popular polynomial error-checking schemes.
True
Data compression can increase the throughput of a communication link.
True
Digital transmission permits higher maximum transmission rates when compared to analog.
True
Ethernet has been refined over the years and is now formally standardized as IEEE802.3ac.
True
Ethernet, a common LAN technology, uses Manchester encoding.
True
For effective error detection and correction, extra error detection "data" must be included with each message
True
Forward error correction is commonly used in satellite transmission.
True
Frequency is the number of cycles per second and is expressed in Hertz.
True
HDLC is very similar to the SDLC synchronous data link protocol.
True
If a computer transmits a message containing "ABC" and the destination computer receives "abc" as the message, the message is corrupted.
True
In a client-server network, the presentation logic is the responsibility of the client computer.
True
In full-duplex transmission, two stations can send and receive simultaneously.
True
The "local loop" refers to the wires that run from the customer premises to the telephone switch of the telephone company.
True
The data link layer accepts messages from the network layer and controls the hardware that transmits them.
True
The four general functions of any application program are: data storage, data access logic, application logic and presentation logic.
True
The fundamental problem in client-based networks is that all data on the server must travel to the client for processing
True
11. The application layer is the seventh layer of the Internet model and specifies the type of connection and the electrical signals that pass through it.
False
13. Ethernet is an example of a network layer protocol.
False
5. A local area network (LAN) connects other LANs and backbone networks (BNs) located in different areas to each other and to wide area networks in a span from 3 to 30 miles.
False
6. An intranet is a LAN that uses Internet technologies and is publicly available to people outside of the organization.
False
8. The OSI model is currently the most widely implemented network model used to develop and build networks of any size, including the Internet itself.
False
A "thin client" approach places most of the application logic on the client.
False
A codec converts an incoming digital signal to an analog signal for transmission over an analog network.
False
A physical circuit refers to the transmission characteristics of the connection, such as the speed at which data is being sent through the connection.
False
A request header for an HTTP request starts with a command, such as GET, and ends with the HTTP version number that the browser understands.
False
ASCII is the least popular code for data communications.
False
1. According to John Chambers, CEO of Cisco (a leading networking technology company), the information age is the second Industrial Revolution.
True
10. In the OSI model, the application layer provides a set of utilities for applications and is the end user's access to the network.
True
In the three-tier architecture, the software on the client computer is responsible for the presentation logic, an application server is responsible for the application logic and a separate database server is responsible for the data access logic and data storage.
True
Manchester encoding is a special type of bipolar signaling in which the signal is changed from high to low or from low to high in the middle of the signal.
True
Media access controls refer to the need to control when computers transmit.
True
Microwave transmissions require a line of sight between any two points.
True
Middleware is the software that sits between the application software on the client and the application software on the server.
True
Of all the media available, fiber optic provides the highest transmission speeds.
True
One form of interference with satellite transmission is called raindrop attenuation in which the transmissions are absorbed by heavy rain.
True
One major drawback to a client-server network lies in the fact that client-server networks enable software and hardware from different vendors to be used together. Your typical web browsing scenario where a person using a web browser accesses a web page from a server on the Internet is a good example of a client-server application architecture.
True
One type of forward error correction is the Hamming code.
True
One way to reduce quantizing errors is to increase the sampling rate of the analog signal.
True
Overhead bits are used for error checking and marking the start and end of characters and packets.
True
Radio data transmission requires that each device has a radio receiver/transmitter and uses a specific frequency.
True
Scalability refers to the ability to increase or decrease the capacity of the computing infrastructure in response to changing capacity needs.
True
Signal bandwidth is the difference between the highest and lowest frequencies in a band.
True
Statistical time division multiplexing does not require the capacity of the circuit to be equal to the sum of the combined circuits.
True
