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