Data Communications
Final Test Solutions
Course Introduction
Data Communications explores the fundamental principles, technologies, and systems involved in the transmission of data between devices and networks. The course covers essential topics such as transmission media, data encoding and modulation techniques, error detection and correction, multiplexing, synchronous and asynchronous communication, and network protocols. Students will gain an understanding of both wired and wireless communication systems, the OSI and TCP/IP models, and practical aspects of data link and physical layers. By the end of the course, learners will be equipped with the knowledge to analyze, design, and troubleshoot data communication networks for efficient and reliable information exchange.
Recommended Textbook
Data and Computer Communications 10th Edition by William Stallings
Available Study Resources on Quizplus
24 Chapters
1079 Verified Questions
1079 Flashcards
Source URL: https://quizplus.com/study-set/3953 Page 2
Chapter 1: Data Communications, data Networks,
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78892
Sample Questions
Q1) There is a potential for error in all communication systems,therefore,_________ and correction are required in circumstances where errors cannot be tolerated.
Answer: error detection
Q2) Each IP packet includes an unique numeric address of the destination host.This address is referred to as an ________.
Answer: IP address
Q3) 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
Answer: D
Q4) __________ 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
Q5) Communicating across arbitrary,multiple,packet-switched networks is ________. Answer: internetworking
To view all questions and flashcards with answers, click on the resource link above. Page 3
Chapter 2: Protocol Architecture, tcpip, and
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78891
Sample Questions
Q1) Facsimile,computer aided design,publishing and medical imaging are all ________ based applications.
A)text
B)image
C)video
D)audio
Answer: B
Q2) The services between adjacent layers in a protocol architecture are expressed in terms of ________ and parameters.
Answer: primitives
Q3) An example of ________ traffic is real time traffic such as voice and video.
A)delay variation
B)elastic
C)multimedia information
D)inelastic
Answer: D
Q4) In the TCP/IP protocol architecture,the ________ layer is concerned with specifying the characteristics of the transmission medium,the nature of the signals and the data rate.
Answer: physical
To view all questions and flashcards with answers, click on the resource link above. Page 4
Chapter 3: Data Transmission
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78890
Sample Questions
Q1) An example of digital data is ________ or character strings.
A)interlaced
B)text
C)audio
D)video Answer: B
Q2) In full-duplex operation both stations may transmit,but only one at a time.
A)True
B)False
Answer: False
Q3) The frequency is the rate at which the signal repeats.
A)True
B)False Answer: True
Q4) The greater the bandwidth of the signal the greater its information carrying capacity.
A)True
B)False Answer: True
To view all questions and flashcards with answers, click on the resource link above. Page 5
Chapter 4: Transmission Media
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78889
Sample Questions
Q1) The transmission media that are used to convey information can be classified as guided or unguided.
A)True
B)False
Q2) A single orbiting satellite will operate on a number of frequency bands called ________ channels.
Q3) A thin,flexible medium capable of guiding an optical ray is an ________.
Q4) The characteristics and quality of a data transmission are determined both by the characteristics of the medium and the characteristics of the signal.
A)True
B)False
Q5) Unshielded twisted pair provides better performance at higher data rates.
A)True
B)False
Q6) The parabolic reflective antenna is a type of antenna used in terrestrial microwave and satellite applications.
A)True
B)False
To view all questions and flashcards with answers, click on the resource link above. Page 6
Chapter 5: Signal Encoding Techniques
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78888
Sample Questions
Q1) A common encoding technique in which each of the two modulated streams is a BPSK signal at half the data rate of the original bit stream is ________.The combined signals have a symbol rate that is half the input bit rate.
A)MPSK
B)MFSK
C)QPSK
D)QAM
Q2) The device used for converting analog data into digital form for transmission,and subsequently recovering the original analog data from the digital,is a ________.
A)modem
B)ASK
C)PAM
D)codec
Q3) The biphase codes are known as self-clocking codes.
A)True
B)False
Q4) Multiple signals,each at a different position on the spectrum,sharing the same transmission medium,is known as frequency division ________.
To view all questions and flashcards with answers, click on the resource link above.
Chapter 6: Error Detection and Correction
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78887
Sample Questions
Q1) An error detection code simply detects the presence of an error. .
A)True
B)False
Q2) In __________ transmission systems,an error occurs when a binary 1 is transmitted and a binary 0 is received,or a binary 0 is transmitted and a binary 1 is received.
A)analog
B)digital
C)parallel
D)none of the above
Q3) A way of viewing the CRC process is to express all values as ________ in a dummy variable X with binary coefficients.
Q4) The ________ is a measure of how much additional bandwidth is required to carry data at the same data rate as without the code.
Q5) In an ??????__________ ,there is a cluster of bits in which a number of errors occur,although not necessarily all of the bits in the cluster suffer an error.
Q6) FEC codes are designed not just to detect but correct errors,avoiding the need for
To view all questions and flashcards with answers, click on the resource link above. Page 8
Chapter 7: Data Link Control Protocols
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78886
Sample Questions
Q1) Synchronization and interfacing techniques are sufficient by themselves.
A)True
B)False
Q2) The flow control in which the destination can stop the flow of data simply by withholding acknowledgment of the receipt of a frame is ________ flow control
A)data
B)stop-and-wait
C)frame acknowledgment
D)ARQ
Q3) The effect of ARQ is to turn an unreliable data link into a reliable one.
A)True
B)False
Q4) With ________ flow control the transmission link is treated as a pipeline that may be filled with frames in transit.
A)linking
B)sliding-window
C)ARQ
D)stop-and-wait
Q5) The most important data link control protocol is ________.
To view all questions and flashcards with answers, click on the resource link above. Page 9
Chapter 8: Multiplexing
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78885
Sample Questions
Q1) With ________ multiplexing data from various sources are carried in repetitive frames.
Q2) Flow control and error control can be provided on a per-channel basis by using a data link control protocol such as HDLC.
A)True
B)False
Q3) The disadvantage of using echo cancellation is the need for ________ logic on both ends of the line.
Q4) The digital subscriber line combines FDM and ________ technologies.
Q5) The two most common forms of multiplexing are frequency division multiplexing and ________.
Q6) ADSL uses ________ multiplexing to exploit the capacity of twisted pair.
A)synchronous time division
B)statistical time division
C)time division
D)frequency division
Q7) A generic term for sharing the capacity of a data link is ________.
Q8) The higher the data rate,the least cost-effective the transmission facility. A)True B)False
To view all questions and flashcards with answers, click on the resource link above. Page 10
Chapter 9: Wan Technology and Protocols
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78884
Sample Questions
Q1) Flexibility,resource sharing,robustness,and responsiveness are all advantages of ________ switching.
Q2) The function of the ________ is to provide a transparent signal path between any pair of attached devices.
Q3) Circuit switching is very efficient in handling digital data.
A)True
B)False
Q4) Circuit switching connections ________.
A)require manual intervention
B)are opaque
C)require one time automated set up
D)are transparent
Q5) Circuit switching is a transparent service.
A)True
B)False
Q6) Typically standards for packet-switching network interfaces do not define a virtual circuit service.
A)True
B)False
Q7) ________ switching is used in public telephone networks.
To view all questions and flashcards with answers, click on the resource link above. Page 11
Chapter 10: Cellular Wireless Networks
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78883
Sample Questions
Q1) All first and second generation cellular networks provide encryption.
A)True
B)False
Q2) ________ occurs at the edge of an impenetrable body that is large compared to the wavelength of the radio wave.When a radio wave encounters such an edge, waves propagate in different directions with the edge as the source.Thus,signals can be received even when there is no unobstructed line-of-sight from the transmitter.
Q3) One of the most widely used models to develop guidelines for cell size was developed by ________.
A)Bellman-Ford
B)Jacobson
C)Dijkstra
D)Okumura/Hata
Q4) The term ________ refers to the provision of multiple fixed data rate logical channels to a given user,in which different data rates are provided on different logical channels.The traffic on each logical channel can be switched independently through the wireless and fixed networks to different destinations.
Q5) First generation cellular networks made use of ________ multiplexing.
To view all questions and flashcards with answers, click on the resource link above.
Page 12
Chapter 11: Local Area Network Overview
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78882
Sample Questions
Q1) A ________ LAN includes a central node to which stations are attached.
A)bus
B)star
C)tree
D)ring
Q2) A ________ local area network consists of a closed loop of repeaters that allow data to circulate around the ring.
A)FDDI
B)ring
C)star
D)tree
Q3) Transmission is generally in the form of frames when using a ring topology.
A)True
B)False
Q4) A transmission of a frame by any one station in a bus or tree topology can be heard by other stations.
A)True
B)False
Q5) The tree layout begins at a point known as the ________.
To view all questions and flashcards with answers, click on the resource link above. Page 13
Chapter 12: Ethernet
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78881
Sample Questions
Q1) A VLAN ________.
A)must not indicate VLAN membership
B)is also referred to as a TCI
C)can span multiple interconnected switches
D)is limited to one switch
Q2) Client/server computing has become a dominant architecture in the business environment.
A)True
B)False
Q3) ________ consists of three subfields: user priority,canonical format indicator and VLAN identifier.
Q4) Because it does not transmit a continuous signal between packets,making it useful in battery-powered applications,________ is designed to produce a 100- Mbps data rate over lower quality Category 3 cable.
Q5) The IEEE 802.3 standard is known as ________.
A)Ethernet
B)layer 2 switching
C)fibre channel
D)subnetworking
Q6) For the lower data rates the ________ MAC protocol is used.
Page 14
To view all questions and flashcards with answers, click on the resource link above.
Chapter 13: Wireless Lans
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78880
Sample Questions
Q1) A typical coverage area for a wireless LAN has a diameter of ________.
A)50 to 225 m
B)25 to 200 m
C)100 to 300 m
D)75 to 250 m
Q2) To integrate the IEEE 802.11 architecture with a traditional wired LAN a ________ is used.The logic is implemented in a device,such as a bridge or router,that is part of the wired LAN and that is attached to the DS.
Q3) A ________ is a system used to interconnect a set of basic service sets and integrated LANs to create an extended service set.
A)DS
B)MPDU
C)AP
D)MSDU
Q4) In a MIMO scheme the transmitter employs just a single antenna.
A)True
B)False
Q5) Currently wireless LAN products fall into three categories: spread spectrum LANs,OFDM LANs and ________ LANs.
To view all questions and flashcards with answers, click on the resource link above. Page 15
Chapter 14: The Internet Protocol
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78879
Sample Questions
Q1) Priority could be assigned on a message basis or on a connection basis.
A)True
B)False
Q2) The IP standard specifies that a compliant implementation must also implement ________,which provides a means for transferring messages from routers and other hosts to a host.Because these messages are transmitted in IP datagrams, their delivery is not guaranteed and their use cannot be considered reliable.
Q3) An IS used to connect two LANs that use similar LAN protocols and acts as an address filter,picking up packets from one LAN that are intended for a destination on another LAN and passing those packets on,is a ________.
A)router
B)bridge
C)broadcast
D)end system
Q4) IPv6 addresses are ________ bits in length.
Q5) Time to Live is similar to a hop count.
A)True
B)False
Q6) IPv6 allows three types of addresses: unicast,anycast,and ________.
Page 16
To view all questions and flashcards with answers, click on the resource link above.
Chapter 15: Transport Protocols
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78878
Sample Questions
Q1) In the case of a single network,________ refers to an attached network device.
A)Port
B)Host
C)Socket
D)Entity
Q2) In a protocol architecture,the transport protocol sits above application and other upper-layer protocols,and just below the network or internetwork layer.
A)True
B)False
Q3) In TCP the combination of port and host is referred to as a ________.
Q4) Using ________,a sender retransmits a segment before timeout because it infers that the segment was lost.If the sender subsequently receives an acknowledgement that does not cover all of the segments transmitted before this is initiated,the sender may infer that two segments were lost from the current window and retransmit an additional segment.
A)fast retransmit
B)backoff
C)outward data dissemination
D)Karn's Algorithm
To view all questions and flashcards with answers, click on the resource link above. Page 17
Chapter 16: Advanced Data Communications Topics
Available Study Resources on Quizplus for this Chatper
44 Verified Questions
44 Flashcards
Source URL: https://quizplus.com/quiz/78877
Sample Questions
Q1) Voice signals are transmitted over telephone lines at their original spectrum,which is referred to as __________ transmission.
A)modulation
B)baseband
C)frequency
D)parity
Q2) The m * n matrix H = [hij] is called the _______ .
Q3) The _________ is the ratio of the amplitude of the input signal to the carrier.
A)modulation index
B)frequency phase
C)division rate
D)none of the above
Q4) Modulation does not permit frequency-division multiplexing.
A)True
B)False
Q5) Amplitude modulation is a linear process and produces frequencies that are the sum and difference of the carrier signal and the components of the modulating signal.
A)True
B)False
To view all questions and flashcards with answers, click on the resource link above. Page 18
Chapter 17: Wireless Transmission Techniques
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78876
Sample Questions
Q1) A disadvantage of MU-MIMO is that the available capacity cannot be shared to meet time-varying demands.
A)True
B)False
Q2) With __________ the same data is coded and transmitted through multiple antennas.
A)spatial multiplexing
B)CDMA
C)spatial diversity
D)SC-FDMA
Q3) MIMO-MAC systems outperform point-to-point MIMO.
A)True
B)False
Q4) The first type of spread spectrum developed is known as _________ .
Q5) In a MIMO scheme the transmitter employs a single antenna.
A)True
B)False
Q6) _______ is a multiplexing technique used with spread spectrum.
Q7) The earliest applications of ________ were military,where it was used for its immunity to jamming.
To view all questions and flashcards with answers, click on the resource link above. Page 19
Chapter 19: Routing
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78875
Sample Questions
Q1) With ________,a node selects only one outgoing path for retransmission of an incoming packet.The outgoing link is chosen at random,excluding the link on which the packet arrived.If all links are equally likely to be chosen,then a node may simply utilize outgoing links in a round robin fashion.
Q2) The original routing algorithm,designed in 1969,was a distributed adaptive algorithm using estimated delay as the performance criterion and a version of the ________ algorithm.
Q3) Due to the large amounts of bandwidth available on modem networks,processing and transmission overhead is a management issue and does not impair network efficiency.
A)True B)False
Q4) The ________ function seeks to design routes through the network for individual pairs of communicating end nodes so that the network is used efficiently.
Q5) A variety of routing algorithms have been developed for packet- switching,frame relay and ATM networks.
A)True
B)False
To view all questions and flashcards with answers, click on the resource link above. Page 20
Chapter 20: Congestion Control
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78874
Sample Questions
Q1) Fairness,QoS,and reservations are all issues related to congestion control that fall into the category of __________ .
Q2) The ________ scheme provides the input parameters to a policing function.
Q3) Congestion is only a critical problem for certain types of switched data networks.
A)True
B)False
Q4) ________ discriminates between incoming packets that conform to QoS agreement and those that don't.
Q5) The ________ specifies the amount by which the data rate can exceed the token rate for short periods of time.
A)bucket size
B)choke packet
C)reservation
D)exponential average
Q6) __________ proposed two procedures,called fast retransmit and fast recovery,that under some circumstances improve on the performance provided by RTO.
Q7) ________ algorithm addresses RTT variance estimation.
To view all questions and flashcards with answers, click on the resource link above. Page 21
Chapter 21: Internetwork Operation
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78873
Sample Questions
Q1) The OpenFlow specification defines three types of tables: flow table,group table,and _______ table.
Q2) In ordinary ________ transmission over an internet,in which each datagram has a unique destination network,the task of each router is to forward the datagram along the shortest path from that router to the destination network.
A)multicast
B)multimedia
C)unicast
D)teleconferencing
Q3) One way to assure that the packet is received by all members of the group is to ________ a copy of each packet to each network in the configuration,over the least-cost route for each network.
Q4) The OpenFlow protocol supports ____________ messages.
A)controller-to-switch
B)asynchronous
C)symmetric
D)all of the above
Q5) The current version of IGMP defines two message types: Membership Query and
To view all questions and flashcards with answers, click on the resource link above. Page 22
Chapter 22: Internetwork Quality of Service
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78872
Sample Questions
Q1) Integrated services are provided on the basis of a 6-bit label in the IP header,which classifies traffic in terms of the type of service to be given by routers for that traffic.
A)True
B)False
Q2) RFC 2205 defines ________ which supplies supporting functionality for ISA.
A)RSVP
B)ISA
C)GSA
D)WFQ
Q3) The ________ is designed to provide a simple,easy to implement,low overhead tool to support a range of network services that are differentiated on the basis of performance.
Q4) A key task of an internet is to deliver data from a source to one or more destinations with the desired QoS.
A)True
B)False
Q5) When a router's buffer overflows it discards packets.
A)True
B)False
To view all questions and flashcards with answers, click on the resource link above. Page 23
Chapter 23: Multiprotocol Label Switching
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78871
Sample Questions
Q1) ________ focuses on the architecture and techniques for constraint-based path computation.
A)CCAMP
B)PCE
C)12vpn
D)Pwe3
Q2) A ________ is a private network that is configured within a public network in order to take advantage of the economies of scale and management facilities of large networks.
Q3) MPLS is used to ensure that all packets in a particular flow take the same route over a ________.
A)label stack
B)backbone
C)tunnel
D)switched path
Q4) A routing algorithm develops information that can be used in determining how to handle packets with different service needs.
A)True
B)False
To view all questions and flashcards with answers, click on the resource link above. Page 24
Chapter 24: Electronic Mail, dns, and Http
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78870
Sample Questions
Q1) Defined in RFC 821,______ is the standard protocol for transferring mail between hosts in the TCP/IP suite.
Q2) A(n)________ domain is an Internet e-mail provider.
A)message store
B)administrative management
C)user agent
D)submission agent
Q3) A _________ is a facility that may store previous requests and responses for handling new requests.
A)cache
B)gateway
C)proxy
D)tunnel
Q4) The _________ is responsible for transferring the message from the MHS to the MS.
A)MDA
B)ADMD
C)MTA
D)MUA
Q5) The Internet mail architecture is currently defined in RFC _______ .
To view all questions and flashcards with answers, click on the resource link above. Page 25
Chapter 25: Internet Multimedia Support
Available Study Resources on Quizplus for this Chatper
45 Verified Questions
45 Flashcards
Source URL: https://quizplus.com/quiz/78869
Sample Questions
Q1) The term _______ refers to software operating on a PC that implements VoIP.
Q2) SIP is based on an HTTP-like request/response transaction model.
A)True
B)False
Q3) The ___________ Protocol describes the content of sessions,including telephony,Internet radio,and multimedia applications.
Q4) SIP supports five facets of establishing and terminating multimedia communications: user location,user availability,session setup,session management,and
Q5) VoIP readily integrates with other services,such as combining Web access with telephone features through a single PC or terminal.
A)True
B)False
Q6) The RTP Timestamp is the absolute wall clock time when this report was sent. A)True
B)False
Q7) In ________ real-time applications,a deterministic upper bound on jitter and high reliability takes precedence over network utilization considerations.
To view all questions and flashcards with answers, click on the resource link above.