Deck 1: Data Communications, data Networks,

Question 1

Data communications deals with the transmission of signals in a reliable and efficient manner.

Answer 1

True

Question 2

The increasing use of optical fiber,while greatly increasing capacity,has caused an increase in transmission prices as well.

Answer 2

False

Question 3

Changes in corporate data traffic patterns are driving the creation of high-speed WANs.

Answer 3

True

Question 4

The growth of ________ enhances the ability of employees to take their business context with them as they move about,resulting in the ability to use enterprise information resources and services from virtually anywhere.

A)extranets
B)high-speed wireless access
C)WANS
D)remote data access

Question 5

An ________ uses Internet and Web technology in an isolated facility internal to an enterprise.

A)application network
B)intranet
C)extranet
D)Internet portal

Question 6

Growth in services and growth in traffic capacity go hand in hand.

Question 7

The LAN is owned by the same organization that owns the attached devices.

Question 8

DWDM enables capacities of ________ per second.

A)terabits
B)picobits
C)megabits
D)gigabits

Question 9

Effective and efficient data communication and networking facilities are vital to any enterprise.

Question 10

A modem is required to establish communication between a workstation and a server over a public telephone network.

Question 11

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.

A)packet switching
B)ATM
C)circuit switching
D)frame relay

Question 12

The basic building block of any communications facility is the transmission line.

Question 13

It is not necessary for a device to interface with the transmission system in order to communicate.

Question 14

Compression refers to the ability of a number of devices to share a transmission facility.

Question 15

Enterprises have formed ________ to reach customers,suppliers,and partners while isolating their proprietary information from unwanted access.

A)intranets and extranets
B)internets and extranets
C)WANS and extranets
D)LANS and WANS

Question 16

There are no fundamental differences among data,voice,and video communications.

Question 17

Frame relay networks are commonly used for terminal-to- computer and computer-to-computer communications.

Question 18

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.

Question 19

There are several fundamental differences between data processing and data communications.

Question 20

Convergence refers to the merger of previously distinct telephony and information technologies and markets.

Question 21

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.

Question 22

The rapid conversion of consumer electronics to digital technology is having an impact on both the Internet and corporate intranets.Two examples of this trend are ________.

A)server farms and DVDs
B)power workgroups and server farms
C)DVDs and CD-ROMs
D)digital versatile disks and digital still cameras

Question 23

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.

A)frame relay
B)ATM
C)circuit switching
D)packet switching

Question 24

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.

A)flow control
B)routing control
C)recovery
D)error correction

Question 25

Recent offerings of ________ multiplexing enable capacities of many terabits per second for long-distance telecommunication and data network links.

Question 26

There is a potential for error in all communication systems,therefore,_________ and correction are required in circumstances where errors cannot be tolerated.

Question 27

Individual hosts and LANs are connected to an Internet Service Provider through a ________.

A)NAP
B)CPE
C)POP
D)NSP

Question 28

A dominant architecture in the business environment and the more recent Web-focused intranet trend is ________ computing.

A)Ethernet
B)GUI
C)token ring
D)client/server

Question 29

The place where telephone companies terminate customer lines and locate switching equipment to interconnect those lines with other networks is the ________.

A)CO
B)ISP
C)POP
D)NAP

Question 30

Once an interface is established ________ is required for communication.

A)digital conversion
B)signal generation
C)synchronization
D)transmission

Question 31

A ________ is a physical facility that provides the infrastructure to move data between connected networks.

A)ATM
B)FDDI
C)NAP
D)NSP

Question 32

__________ is required to assure that the source does not overwhelm the destination by sending data faster than they can be processed and absorbed.

Question 33

Three different forces have consistently driven the architecture and evolution of data communications and networking facilities: traffic growth,development of new services,and ________.

Question 34

The key elements of a simple communications model are ________.

A)source,transmission,destination
B)signal,transmission,receiver
C)source,signal,destination
D)source,signal,receiver

Question 35

In order for data processing devices to communicate certain conventions must be decided on.These requirements can collectively be termed ________.

A)synchronization
B)transmission systems
C)exchange management
D)flow control

Question 36

Today's networks can offer differing levels of ________,which include specifications for maximum delay and minimum throughput.

Question 37

The need to make efficient use of transmission facilities that are typically shared among a number of communicating devices is referred to as ________.

Question 38

________ is the process of squeezing the data down so that a lower capacity, cheaper transmission facility can be used to meet a given demand.

Question 39

Networks that generally cover a large geographical area,require the crossing of public right-of-ways,consist of a number of interconnected switching nodes, and rely on circuits provided by a common carrier are ________.

Question 40

________ involves moving voice into a data infrastructure,integrating all the voice and data networks inside a user organization into a single data network infrastructure,and then extending that into the wireless arena.

Question 41

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.

Question 42

The Internet evolved from the ________ which was developed in 1969 by the Advanced Research Projects Agency of the U.S.Department of Defense.

Question 43

________ networks provide advantages in the areas of mobility and ease of installation and configuration.

Question 44

Each IP packet includes an unique numeric address of the destination host.This address is referred to as an ________.

Question 45

Communicating across arbitrary,multiple,packet-switched networks is ________.