INFO 3229 True/False Practice Questions

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

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

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

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

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 extranet

True

a server farm is a group of computers that are linked together so they act as a one computer

True

amplitude, frequency and phase are all characteristics of a sound wave

True

an intercom is an example of half-duplex transmission

True

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

bandwidth is the difference between the highest and lowest frequencies in a band

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

data communication standards enable each layer in the sending computer to communicate with its corresponding layer in the receiving computer

True

data compression can increase the throughput of a communication link

True

data rate refers to how often the sender can send data and is measured in bits per second

True

demodulation is the conversation of an analog signal into a digital signal

True

ethernet, a common LAN technology, uses Manchester encoding

True

frequency is the number of cycles per second and is expressed in Hertz

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

in the OSI model, the application layer provides a set of utilities for applications and is the end users access to the network

True

Radio, infrared, microwave and satellite are all examples of guided media

False

a "thin client" approach places most of the application logic on the client

False

a LAN connects other LANs and backbone networks (BNs) located in different areas to each other and to wide area networks in a span from 3-30 miles

False

a codec converts 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

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

all 3 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

an intranet is a LAN that uses Internet technologies and is publicly available to people outside of the organization

False

as the demand for more and more network applications grow; host based computing becomes the best solution

False

baud rate is the number of bits transmitted per second

False

coaxial cable cost less and offers less shielding to electrical interference than twisted pair cable

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

ethernet is an example of a network layer protocol

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

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

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 simplex transmission, the data flows in both directions at the same time

False

infrared transmission uses high frequency light waves to carry data through the air on a direct line of sight path between two points

False

multimode fiber is capable of longer transmission distances than single mode fiber

False

multiplexing increases the cost of provisioning network circuits

False

newer telephone circuits, built during the last decade, offer higher quality because they were built using analog transmission

False

non-return-to-zero is a type of unipolar signaling

False

propagation delay is negligible with satellite transmission

False

serial mode transmission is much faster than parallel mode transmissions

False

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

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 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

the earliest data communications networks were client-server networks

False

the simple mail transfer protocol is the least commonly used e-mail standard

False

the standard protocol for communication between a web browser and a web server is the web protocol

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

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 be used with copper cables

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 non return to zero signaling, the voltage alternates between zero and a positive or negative voltage

False

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 date access logic and data storage

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 way to reduce quantizing errors is to increase the sampling rate of the analog signal

True

radio data transmission requires that each device has a radio receiver/transmitter and uses a specific frequency

True

scalability refer to the ability to increase or decrease the capacity of the computing infrastructure in response to changing capacity needs

True

statistical time division multiplexing does not require the capacity of the circuit to be equal to the sum of the combined circuits

True

the "local loop" refers to the wires that run from the customer premises to the telephone switch of the telephone company

True

the 2 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 applications data

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

the medium is the physical matter or substance that carries the voice or data transmission

True

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

the physical layer is the only layer where two communicating nodes are directly connected

True

the predominant method of transferring information in a computer is via parallel mode

True

the specification stage of the de jure standardization process consist of developing nomenclature and identifying the problems to be addressed

True

time division multiplexing is more efficient than frequency division multiplexing because the guardbands used in the frequency division multiplexing are not needed

True

web based e-mail like Hotmail is an example of three-tier client server architecture that provides access to email messages

True

According to John Chambers, CEO of Cisco (a leading networking technology company) the information age is the second Industrial Revolution.

True

ASCII is the coding scheme developed by IBM for its mainframe computer

False

ASCII is the least popular code for data communication

False

"handshaking" refers the testing of the circuit to determine the optimum combination of symbol rate and modulation technique that will produce the highest data transmission rates

True

ANSI is a voting participant in the ISO

True