Information Networking Exam Solutions
Course Introduction
Information Networking explores the principles, technologies, and practices that underpin the exchange and management of data across digital networks. The course covers key concepts such as network architectures, protocols, and topologies, with an emphasis on the design and implementation of secure and efficient communication systems. Students will learn about the role of information networks in modern organizations, the basics of data transmission, routing, and switching, and how different networking models support a variety of applications. Through practical exercises and case studies, participants will gain hands-on experience in configuring network devices, troubleshooting common issues, and understanding emerging trends such as wireless networking and cloud-based information sharing.
Recommended Textbook
Data and Computer Communications 10th Edition by William Stallings
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Chapter 1: Data Communications, data Networks,
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Q1) 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
Answer: B
Q2) ________ networks provide advantages in the areas of mobility and ease of installation and configuration.
Answer: Wireless
Q3) The LAN is owned by the same organization that owns the attached devices.
A)True
B)False
Answer: True
Q4) 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
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Chapter 2: Protocol Architecture, tcpip, and
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Q1) The addiction of control information to data is referred to as ________.
Answer: encapsulation
Q2) The ________ layer is concerned with the exchange of data between an end system and the network to which it is attached.
A)internet
B)physical
C)host-to-host
D)network access
Answer: D
Q3) A ________ is the layered structure of hardware and software that supports the exchange of data between systems and supports distributed applications such as electronic mail and file transfer.
Answer: protocol architecture
Q4) Procedures needed to allow data to traverse multiple interconnected networks is found in the internet layer of the TCP/IP protocol architecture.
A)True
B)False
Answer: True
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Chapter 3: Data Transmission
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Q1) A guided transmission medium is ________ if it provides a direct link between two devices and those are the only two devices sharing the medium.
A)multipoint
B)simplex
C)point-to-point
D)wireless
Answer: C
Q2) In ________ transmission signals are transmitted in only one direction; one station is the transmitter and the other is the receiver.
A)half duplex
B)simplex
C)full duplex
D)multipoint
Answer: B
Q3) The ________ bandwidth is the band where most of the signal energy is concentrated.
Answer: effective
Q4) Twisted pair,coaxial cable and optical fiber are examples of ________ media. Answer: guided
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Chapter 4: Transmission Media
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Q1) Coaxial cable can be used over longer distances and support more stations on a shared line than twisted pair.
A)True
B)False
Q2) Wireless transmission frequencies in the range of 30 MHz to 1 GHz are suitable for omnidirectional applications and are referred to as the ________ range.
A)radio
B)transponder
C)terrestrial
D)paraboloid
Q3) The parabolic reflective antenna is a type of antenna used in terrestrial microwave and satellite applications.
A)True
B)False
Q4) The least expensive and most widely used guided transmission medium for both analog and digital signals is ________.
Q5) A single orbiting satellite will operate on a number of frequency bands called ________ channels.
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Chapter 5: Signal Encoding Techniques
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Q1) The ________ code has been specified for the IEEE 802.3 (Ethernet)standard for baseband coaxial cable and twisted pair bus LANs.
A)Manchester
B)HDB3
C)differential Manchester
D)NRZ
Q2) The process of converting analog data into digital data is known as ________.
Q3) There are two important parameters in a delta modulation scheme: the size of the step assigned to each binary digit and the ________ rate.
Q4) Using two different voltage levels for the two binary digits is a difficult way to transmit digital signals.
A)True
B)False
Q5) In the differential ________ scheme a binary 0 is represented by sending a signal burst of the same phase as the previous signal burst sent.A binary 1 is represented by sending a signal burst of opposite phase to the preceding one.
Q6) The parameter known as the ________ is the ratio of the amplitude of the input signal to the carrier.
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Chapter 6: Error Detection and Correction
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Q1) Modulo 2 arithmetic uses binary addition with no carries,which is just the exclusive-OR (XOR)operation.
A)True
B)False
Q2) In a(n)________ 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.
A)error burst
B)single-bit error
C)idle state
D)error detection
Q3) 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.
Q4) An ___________ is a group of bits in which two successive erroneous bits are always separated by less than a given number x of correct bits.
Q5) A __________ error can occur in the presence of white noise.
Q6) The ________ is a measure of how much additional bandwidth is required to carry data at the same data rate as without the code.
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Chapter 7: Data Link Control Protocols
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Q1) Selective reject is a useful choice for a satellite link because of the long propagation delay involved.
A)True
B)False
Q2) The transmission medium between systems is referred to as a ________ when a data link control protocol is used.
A)data link
B)flow link
C)transmission link
D)control link
Q3) The initiation,maintenance,and termination of a sustained data exchange require management procedures for the exchange.
A)True
B)False
Q4) It is necessary to impose a layer of control in each communicating device that provides functions such as flow control,error detection,and error control.
A)True
B)False
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Chapter 8: Multiplexing
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Q1) When the useful bandwidth of the transmission medium exceeds the required bandwidth of signals to be transmitted,________ multiplexing is possible.
Q2) ________ multiplexing is commonly used for multiplexing digitized voice streams and data streams.
A)Time division
B)Frequency division
C)Statistical time division
D)Synchronous time division
Q3) ________ uses multiple carrier signals at different frequencies,sending some of the bits on each channel.The modem sends out test signals on each subchannel to determine the signal-to-noise ratio.The modem then assigns more bits to channels with better signal transmission and less bits to channels with poorer signal transmission.
Q4) With ________ multiplexing a number of signals are carried simultaneously on the same medium by allocating to each signal a different frequency band.
Q5) A form of frequency division multiplexing where the light streaming through the fiber consists of many colors,or wavelengths,each carrying a separate channel of data is ________ multiplexing.
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Chapter 9: Wan Technology and Protocols
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Q1) With packet switching,a station transmits data in small blocks called ________.
A)data blocks
B)boxes
C)channels
D)packets
Q2) In the ________ approach in packet switching each packet is treated independently with no reference to packets that have gone before.
A)datagram
B)media gateway
C)softswitch
D)virtual circuit
Q3) A specific preplanned route through the network between two stations is a(n)________ virtual circuit.
A)transport
B)direct
C)internal
D)external
Q4) With internal ________ each packet is treated independently and packets intended for the same destination may follow different routes.
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Chapter 10: Cellular Wireless Networks
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Q1) A technique in widespread use in second generation cellular networks is ________.
A)TCMP
B)CDMA
C)3G
D)HTTP
Q2) ________ occurs when an electromagnetic signal encounters a surface that is large relative to the wavelength of the signal.
A)Scattering
B)Diffraction
C)Reflection
D)Termination
Q3) The area to be covered in a cellular network is divided into cells in a pentagonal tile pattern that provide full coverage of the area and equidistant antennas.
A)True
B)False
Q4) Cells in areas of high usage can be split into smaller cells.
A)True
B)False
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Chapter 11: Local Area Network Overview
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Q1) The term ________ refers to the way in which the end points,or stations,attached to the network are interconnected.
A)control link
B)topology
C)medium
D)medium access link
Q2) Store-and-forward switch and cut-through switch are two types of ________ switches that are available as commercial products.
Q3) 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
Q4) The ________ is designed for use between local area networks that use identical protocols for the physical and link layers and,because the devices all use the same protocols,the amount of processing here is minimal.
Q5) The tree layout begins at a point known as the ________.
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Chapter 12: Ethernet
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Q1) With ________,a station wishing to transmit first listens to the medium to determine if another transmission is in progress.If the medium is in use,the station must wait.If the medium is idle,the station may transmit.
A)ALOHA
B)transmission backlog delay
C)Ethernet
D)CSMA
Q2) Ethernet is now the preferred carrier wire line vehicle for bridging wireless technologies such as WiFi and WiMAX into local Ethernet networks.
A)True
B)False
Q3) An algorithm is needed with CSMA to specify what a station should do if the medium is found busy.
A)True
B)False
Q4) IEEE 802.3ba specifies three types of transmission media: copper backplane, twisted pair and ________.
Q5) For the lower data rates the ________ MAC protocol is used.
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Chapter 13: Wireless Lans
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Q1) The ________ module includes either bridge or router functionality to link the wireless LAN to the backbone.
Q2) In the IEEE 802 physical layer frame format the ________ field enables the receiver to acquire an incoming OFDM signal and synchronize the demodulator.
Q3) A user module acts as an interface to a wireless LAN..
A)True
B)False
Q4) The ________ is a set of one or more interconnected BSSs and integrated LANs that appear as a single BSS to the LLC layer at any station associated with one of these BSSs.
A)DS
B)AP
C)MPDU
D)ESS
Q5) IEEE ________ embodies changes in three general areas: use of MIMO, enhancements in radio transmission,and MAC enhancements.
Q6) An ________ is an entity that has station functionality and provides access to the distribution system via the wireless medium for associated stations.
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Chapter 14: The Internet Protocol
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Q1) The driving motivation for the adoption of a new version of IP was the limitation imposed by the 32-bit address field in IPv4.
A)True
B)False
Q2) An entity may transmit data to another entity in such a way that each PDU is treated independently of all prior PDUs.This is known as ________ data transfer.
Q3) Starting with a 32-bit block consisting of four 8-bit fields,the ________ contains a list of one or more intermediate nodes to be visited on the way to a packet's destination.
Q4) In 1994 the Internet Architecture Board issued a report titled "Security in the Internet Architecture" that stated that the general consensus was that the Internet was secure and there were no areas of security concern.
A)True
B)False
Q5) The most widely used protocol for internetworking is the ________.
Q6) The counterpart of fragmentation is reassembly.
A)True
B)False
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Chapter 15: Transport Protocols
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Q1) 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
Q2) The receiver needs to adopt some policy concerning the amount of data it permits the sender to transmit.
A)True
B)False
Q3) The SYN segment functions both as a connection request and as a connection acknowledgment.
A)True
B)False
Q4) Once the Passive Open command is issued,the transport entity creates a connection object of some sort that is in the ________ state.
A)OPEN
B)LISTEN
C)CLOSED
D)FIN
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Chapter 16: Advanced Data Communications Topics
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Q1) An LDPC construction technique that results in a systematic code is called a__________ code.
A) Tanner
B) irregular LDPC
C) regular LDPC
D) repeat-accumulate
Q2) The LFSR implementation of a cyclic error-correcting encoder is the same as that of the CRC error-detecting code.
A)True
B)False
Q3) Bose-Chaudhuri-Hocquenghem is an example of a _________ code.
Q4) _________ codes are a widely used subclass of nonbinary BCH codes.
Q5) 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
Q6) _________ modulation is the simplest form of modulation.
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Chapter 17: Wireless Transmission Techniques
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Q1) With __________ the same data is coded and transmitted through multiple antennas.
A)spatial multiplexing
B)CDMA
C)spatial diversity
D)SC-FDMA
Q2) The IFFT operation has the effect of ensuring that the subcarriers do not interfere with each other.
A)True
B)False
Q3) In a multipath scenario where each receiving antenna would experience a different interference environment,there is a high probability that if one antenna is suffering a high level of fading, another antenna has sufficient signal level.
A)True
B)False
Q4) Diverse multipath fading offers multiple views of the transmitted data at the receiver,thus increasing robustness.
A)True
B)False
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Chapter 19: Routing
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Q1) With ________,routing decisions that are made change as conditions on the network change.
A)fixed routing
B)flooding
C)adaptive routing
D)random routing
Q2) When the internal operation of the network is ________,a routing decision is made individually for each packet.
A)datagram
B)robust
C)internal virtual circuit
D)virtual circuit
Q3) The selection of a route is generally based on some performance criterion.
A)True
B)False
Q4) The principle conditions that influence routing decisions are ________.
A)complexity and node malfunctions
B)failure and congestion
C)overhead and bandwidth
D)route distance and amount of nodes
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Chapter 20: Congestion Control
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Q1) __________ schemes are based on providing an explicit data rate limit to the source over a logical connection.
A)Backward
B)Rate based
C)Forward
D)Binary
Q2) Defined in RFC 4340,__________ is an unreliable connection-oriented protocol that can include mechanisms for detecting congestion by determining round-trip time and packet drop rates.
A)TCP
B)RTT
C)DCCP
D)RTO
Q3) ________ discriminates between incoming packets that conform to QoS agreement and those that don't.
Q4) Token bucket is used in the Bluetooth specification.
A)True
B)False
Q5) ________ algorithm addresses RTT variance estimation.
Q6) The ________ scheme provides the input parameters to a policing function.
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Chapter 21: Internetwork Operation
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Q1) A membership query message is sent by a multicast router.
A)True
B)False
Q2) Minimal encapsulation results in less overhead and can be used if the mobile node,home agent,and foreign agent all agree to do so.
A)True
B)False
Q3) A mobile node is assigned to a particular network,known as its ______ .
Q4) ______ is a separate routing protocol,independent of any existing unicast routing protocol,and is designed to extract needed routing information from any unicast routing protocol and may work across multiple ASs with a number of different unicast routing protocols.
Q5) When the mobile node moves its attachment point to another network,that network is considered a foreign network for this host.
A)True
B)False
Q6) A _______ query is used to learn if any attached device desires reception of packets sent to a specified multicast address,from any of a specified list of sources.
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Chapter 22: Internetwork Quality of Service
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Q1) A drawback to the ________ queuing discipline is that no special treatment is given to packets from flows that are of a higher priority or are more delay sensitive.
Q2) Three categories of ISA services are: guaranteed,controlled load and ________.
Q3) A ________ delays packets as necessary so that the packet stream in a given class does not exceed the traffic rate specified in the profile for that class.
A)marker
B)meter
C)dropper
D)shaper
Q4) A ________ is a contract between a network provider and a customer that defines specific aspects of the service that is to be provided.
Q5) Many traffic sources can be defined easily and accurately by a token bucket scheme.
A)True
B)False
Q6) ________ traffic is the type of traffic for which internets were designed.
Q7) The ________ is the most demanding service provided by ISA.
Q8) Real-time traffic is an example of ________ traffic.
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Chapter 23: Multiprotocol Label Switching
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Q1) 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
Q2) Like IP,MPLS is connection oriented.
A)True
B)False
Q3) Multiprotocol Label Switching is well suited to implementing virtual private networks.
A)True
B)False
Q4) MPLS is intended to provide connection-oriented QoS with features similar to those found in ________.
A)Integrated Services
B)IETF
C)Differentiated Services
D)ISA
Q5) The MPLS architecture supports two routing options: hop-by-hop and ________.
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Chapter 24: Electronic Mail, dns, and Http
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Q1) _______ are server programs that hold information about a portion of the domain name tree structure and the associated RRs.
A)MIME
B)Name servers
C)DNS databases
D)Domain name space
Q2) _______ is a section in a DNS message.
A)Header
B)Question
C)Authority
D)All of the above
Q3) IMAP always keeps messages on the server and replicates copies to the clients.
A)True
B)False
Q4) The Internet mail architecture is currently defined in RFC _______ .
Q5) The author MUA processes receive mail for storage and/or display to the recipient user.
A)True
B)False
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Chapter 25: Internet Multimedia Support
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Q1) SIP supports five facets of establishing and terminating multimedia communications: user location,user availability,session setup,session management,and _________ .
Q2) The term ___________ refers to the use of multiple forms of information,including text,still images,audio,and video.
Q3) The _______ packet confirms to receivers that a prolonged silence is due to departure rather than network failure.
A)Note
B)RR
C)BYE
D)Timestamp
Q4) In ________ real-time applications,a deterministic upper bound on jitter and high reliability takes precedence over network utilization considerations.
Q5) SIP can support any type of single media or multimedia session, including teleconferencing.
A)True
B)False
Q6) The term _______ refers to software operating on a PC that implements VoIP.
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