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CNT 4104 Exam Questions And Accurate Answers
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CNT 4104 Exam Questions AndAccurate Answers
Data communications deals with the transmission of signals in a reliable and efficient
manner - Answer true
Changes in corporate data traffic patterns are driving the creation of high-speed WANs -
Answer true
A modem is required to establish communication between a workstation and a server
over a public telephone network - Answer true
Compression refers to the ability of a number of devices to share a transmission facility -
Answer false
The basic building block of any communications facility is the transmission line - Answer
true
Developing switching systems with the capacity and rapid response to support the
demand requirements with the increased use of fiber optic transmission is no longer a
challenge - Answer false
Frame relay networks are commonly used for terminal-to-computer and
computer-to-computer communications - Answer false. Packet-switching networks are
commonly used
The LAN is owned by the same organization that owns the attached devices - Answer
true
Enterprises have formed ____ to reach customers, suppliers, and partners while
isolating their proprietary information from unwanted access - Answer intranets and
extranets
A dominant architecture in the business environment and the more recent Web-focused
intranet trend is _________ computing - Answer client/server
The key elements of a simple communications model are - Answer source, transmission,
destination
DWDM enables capacities of ____ per second - Answer terabits
An _____ uses Internet and Web technology in an isolated facility internal to an
enterprise - Answer intranet
A network in which small chunks of data are passed through the network from node to
,node, and at each node the entire data chunk is received, stored briefly, and then
transmitted to the next node, is a _____ network - Answer packet switching
In order for data processing devices to communicate certain conventions must be
decided on. These requirements can collectively be termed _____ - Answer exchange
management
In situations in which an information exchange is interrupted due to a fault somewhere
in the system, ____ techniques are needed to either resume activity at the point of
interruption or to restore systems to their state prior to the beginning of the exchange -
Answer recovery
In a _____ network, a dedicated communications path is established between two
stations through the nodes of the network. The telephone network is the most common
example - Answer circuit switching
A _____ is a physical facility that provides the infrastructure to move data between
connected networks - Answer NAP / network access provider
Individual hosts and LANs are connected to an Internet Service Provider through a ___ -
Answer POP / point of presence
The place where telephone companies terminate customer lines and locate switching
equipment to interconnect those lines with other networks is the ___ - Answer CO /
central office
Today's networks can offer differing levels of ______, which include specifications for
maximum delay and minimum throughput - Answer QoS / quality of service
An _____ extends a company's intranet out onto the Internet to allow selected
customers, suppliers, and mobile workers to access the company's private data and
applications - Answer extranet
______ is required to assure that the source does not overwhelm the destination by
sending data faster than they can be processed and absorbed. - Answer flow control
Networks that generally cover a large geographical area, require the crossing of public
right-of-ways, consists of a number of interconnected switching nodes, and rely on
circuits provided by a common carrier are _____ - Answer wide area networks
Using fixed length packets and sometimes referred to as cell relay, _______ is a
culmination of developments in circuit switching and packet switching. It is so efficient
that it can offer a constant data rate channel even though it is using a packet switching
technique - Answer asynchronous transfer mode
_______ networks provide advantages in the areas of mobility and ease of installation
and configuration. - Answer wireless
The Internet evolved from the ____ which was developed in 1969 by the Advanced
, Research Projects Agency of the U.S Department of Defense - Answer ARPANET
Communicating across arbitrary, multiple, packet-switched networks is _____ - Answer
internetworking
Each IP packet includes an unique numeric address of the destination host. This
address is referred to as an ________ - Answer IP address
__________ is the process of squeezing the data down so that a lower capacity, cheaper
transmission facility can be used to meet a given demand - Answer compression
The OSI protocol architecture consists of 5 layers: physical, network access, internet,
transport, and application - Answer true
Procedures needed to allow data to transverse multiple interconnected networks is
found in the internet layer of the TCP/IP protocol architecture - Answer true
For most applications running as part of the TCP/IP protocol architecture, the transport
layer protocol is TCP - Answer true
The software used at the network access layer is not dependent on the type of network
used because circuit switching, packet switching and local area networks all have the
same standards. - Answer false
FTP provides a basic electronic mail transport facility. - Answer false. Simple Mail
Transfer Protocol provides a basic electronic mail transport facility
SSH is an application later protocol in TCP/IP architecture - Answer true
SSH protocol enables the user and the remote authenticate each other - Answer true
The development of IP (Internet Protocol) is used at the internet layer to provide the
routing function across multiple networks. - Answer true
It is not necessary for each host on a subnetwork to have an unique global internet (i.e.,
IP) address. - Answer false
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