Deck 1: Introduction to Data Communications

Question 1

The Internet was started by the U.S.Department of defense in 1969 as a network of four computers called ARPANET.

Answer 1

True

Question 2

The OSI model is the most widely used network model to develop and build networks today.

Answer 2

True

Question 3

Due to recent 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.

Answer 3

True

Question 4

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

Question 5

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

Question 6

The first electronic data communication system was the telephone developed by Alexander Graham Bell.

Question 7

The first transcontinental telephone service was established in the 1940s.

Question 8

The application layer is the seventh layer of the Internet model and provides the end user's access to the network.

Question 9

One perspective of data communications and networking as stated in the textbook,examines the management of networking technologies,including security,network design,and managing the network on a day-to-day basis and long term basis.

Question 10

An Inter-Exchange Carrier (IXC)provides only local telephone services to homes and businesses.

Question 11

Ethernet is an example of a network layer protocol.

Question 12

The Telecommunications Act of 1996 now permits the RBOCs to provide long distance outside the region in which they provide local telephone services.

Question 13

Telecommunications is the transmission of voice and video as well as data and implies transmitting a longer distance than in a data communication network.

Question 14

The network layer is responsible for routing messages from the source computer to the destination computer.

Question 15

In the OSI model,the application layer is the end user's access to the network.

Question 16

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

Question 17

Common carriers include the RBOCs,IXCs,and Cable TV companies.

Question 18

At the transport layer in the Internet model,TCP is responsible for breaking large files received from the application layer into smaller packets and opening a connection to a server for transferring the packets.

Question 19

A car manufacturer may give access to certain portions of its network to some of its suppliers via Internet.This is an example of an Extranet.

Question 20

A local area network (LAN)connects other LANs and BNs located in different areas to each other and to wide area networks in a span from 3 to 30 miles.

Question 21

An Application Service Provider (ASP)develops a specific system and companies purchase or rent the service without installing the system on their own computers.

Question 22

The Internet has always been open to commercial traffic.

Question 23

Which of the following statements about the U.S.telephone marketplace is not true,as of the Telecommunications Act of 1996?

A) Quickly, the local telephone industry in the U.S. went from a highly regulated monopoly to open competition.
B) RBOCs may not provide long distance service outside the region in which they provide local telephone services.
C) The common carriers may provide local services to customers.
D) RBOCs can provide long distance services inside their region if at least one viable competitor for local telephone services exists.
E) The Telecommunications Act replaced the 1984 consent decree under which AT&T was broken up.

Question 24

In 1996,the U.S.Congress replaced all current laws,FCC regulations,and the consent decree for AT&T.It:

A) set up the Telecommunications Competition and Deregulation Act
B) permitted MCI to provide limited long distance service in the U.S.
C) permitted telephone and/or computer equipment that was not manufactured by Bell Telephone to be connected to AT&T's network
D) divided AT&T into two parts: one part for long distance service, and a second part, comprised of seven operating companies, for local telephone service
E) set up deregulation for international telecommunications markets in 68 countries

Question 25

A backbone network is:

A) a high speed central network that connects other networks in a distance spanning up to several miles.
B) a group of personal computers or terminals located in the same general area and connected by a common cable (communication circuit) so they can exchange information.
C) a network spanning a geographical area that usually encompasses a city or county area (3 to 30 miles).
D) a network spanning a large geographical area (up to 1000s of miles).
E) a network spanning exactly 200 miles with common carrier circuits.

Question 26

The function of the file server is to :

A) store data and software programs that can be used by client computers on the network.
B) manage all printing requests from clients on the network.
C) transfer e-mail messages to other servers on the network.
D) store HTML documents for an Internet or intranet web site.
E) coordinate the communication of client and servers on the network.

Question 27

Networks that are designed to connect similar computers that share data and software with each other are called:

A) client/server networks
B) peer-to-peer networks
C) host networks
D) client networks
E) local area networks

Question 28

Modern (1990s and beyond)data communication networks are characterized by:

A) decks of punch cards
B) online terminals for batch processing
C) isolated (stand-alone) personal computers
D) batch I/O devices
E) distributed systems that rely heavily on networking

Question 29

A local area network is:

A) a large central network that connects other networks in a distance spanning exactly 5 miles.
B) a group of personal computers or terminals located in the same general area and connected by a common cable (communication circuit) so they can exchange information.
C) a network spanning a geographical area that usually encompasses a city or county area (3 to 30 miles).
D) a network spanning a large geographical area (up to 1000s of miles).
E) a network spanning exactly 10 miles with common carrier circuits.

Question 30

Which of the following is not true about a server?

A) stores data and software that can be accessed by the client.
B) is the pathway through which messages travel.
C) in client/server computing they work together over the network with client computers to support the business application.
D) can only perform one function on a network.
E) stores documents and graphics that can be accessed from any Web browser.

Question 31

Passive optical networking,a key trend for the future,means that virtually any computer will be able to communicate with any other computer in the world.

Question 32

In 1984,a federal judge broke up a highly contested telephone service monopoly and:

A) set up the Telecommunications Competition and Deregulation Act
B) permitted MCI to provide limited long distance service in the U.S.
C) permitted telephone and/or computer equipment that was not manufactured by Bell Telephone to be connected to AT&T's network
D) divided AT&T into two parts: one part for long distance service, and a second part, comprised of seven regional operating companies, for local telephone service
E) set up deregulation for international telecommunications markets in 68 countries

Question 33

ANSI is a voting participant in the ISO.

Question 34

In 1970,a key decision regarding MCI:

A) set up the Telecommunications Competition and Deregulation Act
B) permitted MCI to provide limited long distance service in the U.S.
C) permitted telephone and/or computer equipment that was not manufactured by Bell Telephone to be connected to AT&T's network
D) divided AT&T into two parts: one part for long distance service, and a second part, comprised of seven operating companies, for local telephone service
E) set up deregulation for international telecommunications markets in 68 countries

Question 35

The high bandwidth requirements (high communications needs)for video have slowed its integration into computer networks.

Question 36

Data communications and networking can be considered as a global area of study because:

A) new technologies and applications emerge from a variety of countries and spread around the world
B) the technologies enable global communication
C) the political and regulatory issues are exactly the same in every country
D) a and b
E) none of the above

Question 37

In 1874,Alexander Graham Bell developed the concept for the telephone.

Question 38

A metropolitan area network is:

A) a high speed central network, built with privately owned media, which connects other networks in a distance spanning up to several miles.
B) a group of personal computers or terminals located in the same general area and connected by a common cable (communication circuit) so they can exchange information.
C) a network that spans a geographical area that usually encompasses a city or county area (3 to 30 miles) and that typically uses common carrier circuits.
D) a network spanning a large geographical area (up to 1000s of miles).
E) a network spanning exactly 543.56 miles with private media.

Question 39

The specification stage of the de juro standardization process consists of developing nomenclature and identifying the problems to be addressed.

Question 40

In 1983,the Internet was split into two parts,one dedicated solely to the military and one dedicated to university research centers.The two parts were called:

A) Intranet and Extranet
B) BITNET and NSFNET
C) Milnet and Internet
D) ARPANET and Milnet
E) none of the above

Question 41

Which layer of the OSI model is responsible for ensuring flow control so that the destination station does not receive more packets that it can process at any given time?

A) presentation Layer
B) transport Layer
C) physical Layer
D) session Layer
E) application Layer

Question 42

Which of the following is a function of the transport layer?

A) linking the physical layer to the network layer
B) formatting messages by indicating where they start and end
C) deciding which route the message should take
D) breaking long messages into several smaller messages
E) specifying the type of connection and the electrical signals, radio waves, or light pulses that pass through it

Question 43

In which layer of the Internet model would the HTTP standard be used?

A) physical
B) application
C) transport
D) network
E) data link

Question 44

Which of the following would be a standard used at the Data Link layer of the Internet or OSI model?

A) IP
B) TCP
C) Ethernet
D) HTTP
E) FTP

Question 45

The fourth layer of the OSI model is called the __________ layer.

A) network
B) transport
C) session
D) data link
E) presentation

Question 46

Which of the following is a term used to group together the physical and data link layers?

A) Internetwork layers
B) Hardware layers
C) Software layers
D) Middleware layers
E) Application layers

Question 47

The primary reason for networking standards is to:

A) simplify cost accounting for networks
B) ensure that hardware and software produced by different vendors can work together
C) make it more difficult to develop hardware and software that link different networks
D) ensure that all network components of a particular network can be provided by only one vendor
E) lock customers into buying network components from one vendor

Question 48

The____________ layer of the OSI model is responsible for data format translation.

A) session
B) presentation
C) physical
D) application
E) transport

Question 49

The _________ layer performs error checking which is redundant with the function of the _________ layer.

A) application, presentation
B) physical, data link
C) transport, data link
D) presentation, transport
E) network, physical

Question 50

In the Internet model,the application layer corresponds to the ________,layer(s)s of the OSI model.

A) data link and network
B) session, presentation and application
C) application layer
D) application and presentation
E) network, transport and presentation

Question 51

A(n)_____________ is a set of rules that determine what a layer would do and provides a clearly defined set of messages that software at the layer needs to understand.

A) agreement
B) standard
C) protocol
D) regulations
E) policy

Question 52

Which layer of the OSI model is responsible for ensuring that all packets sent are received by the destination station by dealing with end-to-end issues?

A) presentation Layer
B) transport Layer
C) physical Layer
D) session Layer
E) application Layer

Question 53

___________ is an orderly close to a dialogue between end users.

A) Session termination
B) Physical bits
C) Frame overhead
D) Packet encapsulation
E) Message encryption

Question 54

Which of the following is not a function of the data link layer?

A) deciding when to transmit messages over the media
B) formatting the message by indicating where messages start and end, and which part is the address
C) detecting and correcting any errors that have occurred in the transmission of the message
D) specifying the type of connection, and the electrical signals, radio waves, or light pulses that pass through it
E) controlling the physical layer by determining when to transmit

Question 55

Which of the following is not a property of a WAN:

A) connects backbone networks and MANS.
B) spans hundreds or thousands of miles
C) provides data transmission speeds from 56Kbps to 10Gbps.
D) connects a group of computers in a small geographic area such as room, floor, building or campus.
E) uses lease lines from IXCs like ATT, MCI, Sprint.

Question 56

A(n)_________ is a LAN that uses the same technologies as the Internet but is open to only those inside the organization.

A) WAN
B) BN
C) extranet
D) intranet
E) MAN

Question 57

The _________ layer is responsible for routing of messages from the sender to the final destination.

A) data communication layer
B) resident layer
C) application layer
D) network layer
E) physical layer

Question 58

Which is not a function of the physical layer:

A) transmission of bits.
B) defining the rules by which one and zeroes are transmitted.
C) providing error-free transmission of data.
D) providing the physical connection between sender and receiver.
E) specifying the type of connection and type of signals, waves or pulses that pass though it.

Question 59

A(n)_________ is a LAN that uses the same technologies as the Internet but is provided to invited users outside the organization who access it over the Internet.

A) WAN
B) BN
C) extranet
D) intranet
E) MAN

Question 60

The network layer of the Internet model uses the _____________ protocol to route messages though the network.

A) TCP
B) HTTP
C) FTP
D) SMTP
E) IP

Question 61

Pervasive networking means that:

A) the five-layer network model will be used to design all networks
B) all networks of the future will be developed by a monopolistic organization
C) the cost of computers will be higher in the future
D) virtually all computers will be networked in some way to other computers and be able to transmit data at staggeringly fast rates
E) cable companies will offer more than 150 network selections for viewers

Question 62

The three stages of the de juro standardization process are ______________________.

A) specification, identification of choices and acceptance.
B) planning, implementing and acceptance.
C) brainstorming, identification and implementing.
D) specification, formalization, and acceptance.
E) none of the above.

Question 63

The American National Standards Institute:

A) is the coordinating organization for the United States' national system of standards
B) is a professional society in the U.S. whose standards committees focus on local area network standards
C) sets the standards that govern how much of the Internet will operate
D) is an agency that develops federal information processing standards for the federal government
E) makes technical recommendations about global telephone rates

Question 64

The integration of voice,video,and data communications is also known as __________.

A) convergence
B) peer-to-peer networks
C) metropolitan wide networks
D) regional bell operating company
E) intranet

Question 65

Which of the following is not a data link layer standard?

A) HTTP
B) Ethernet
C) T1
D) PPP
E) Frame Relay

Question 66

A(n)_________develops a specific system and companies purchase the service without ever installing the system on their own computers.

A) file server
B) regional bell operating system
C) open systems interconnection reference model
D) application service provider
E) inter-exchange carrier

Question 67

The internet standards organization that will allow anyone to join is __________________.

A) ANSI
B) ISO
C) IETF
D) IEEE
E) ITU-T

Question 68

Which of the following is not true about de juro standards?

A) They are always developed before de facto standards.
B) One example exists for network layer software (IP).
C) They can be developed by an official industry body.
D) They can take several years to develop.
E) They can be developed by a government body.

Question 69

Which of the following is true about ISO:

A) It makes technical recommendations about data communications interfaces
B) Its name stands for International Organization for Standardization
C) It is based in Geneva, Switzerland
D) It is one of the most important standards-making bodies
E) All of the above

Question 70

The __________________ is one of the most important developments in the history of both information systems and communication systems.

A) Internet
B) Telephone
C) Switch
D) Router

Question 71

The 1980s saw the _________________ revolution

A) personal computer
B) mainframe
C) Internet
D) Web server

Question 72

Which standards body is responsible for the development of local area network (LAN)standards?

A) ANSI
B) ISO
C) IETF
D) IEEE
E) ITU-T

Question 73

The term ______________ refers to high speed communication circuits such as DSL.

A) protocol stack
B) regional bell operating company
C) monopoly
D) broadband communications
E) print server

Question 74

Which of the following is not an important future trend in communication and networking?

A) development of online batch systems
B) integration of voice, video, and data
C) pervasive networking
D) provision of new information services on rapidly expanding networks
E) development of extremely high speed broadband networks

Question 75

__________ ensure that hardware and software produced by different vendors work together.

A) Delimiters
B) Standards
C) ASPs
D) RBOCs
E) Intranets

Question 76

Which of the following is not an application layer standard?

A) HTTP
B) POP
C) T1
D) IMAP
E) HTML

Question 77

A(n)_____________ is a company that provides a wide range of standardized information services,in the same manner that electric companies provide electricity.

A) file server
B) host
C) information utility
D) RBOC
E) IXC

Question 78

A _____________ is the input-output hardware device at the user's end of a communication circuit.

A) Server
B) Circuit
C) Client
D) Host

Question 79

Which of the following is not true about de facto standards?

A) They never evolve into de juro standards.
B) They are those standards that emerge in the marketplace.
C) They tend not to be developed by an official industry or government body.
D) They are generally supported by more than one vendor but de facto standards have no official standing.
E) They tend to emerge based upon the needs/response of the marketplace.

Question 80

Which of the following is not true about ITU-T:

A) It is the technical standards-setting organization of the United Nations International Telecommunications Union
B) It is the International Telecommunications Union - Telecommunications Group
C) Its membership is limited to U.S. telephone companies
D) It is based in Geneva, Switzerland
E) Its membership is comprised of representatives from over 200 member countries