Business Data Communications- Infrastructure, Networking and Security 7th Edition

Commercial use of the Internet was discouraged until approximately 1988. Answer: F Answer: F Answer: F In order to compensate for synchronization problems, another type of encoding method called biphase can be employed; these methods place a clock pulse within the data stream. Answer: T Answer: T Answer: T SMTP returns an end-to-end acknowledgement to the

Two types of transmission media recently gaining in popularity in business communications are __________ connections and fiber optic cables. Answer: wireless Answer: wireless Answer: wireless The antenna systems on or near the earth are referred to as earth _________ . Answer: stations Answer: stations Answer: stations Four categories of virtualization are: operating system virtualization, server virtualization,

There are basically four ways to divide the spectrum among active users: frequency division multiple access (FDMA), time division multiple access (TDMA), code division multiple access (CDMA), and ______________. Answer: space division multiple access (SDMA) Answer: space division multiple access (SDMA) Answer: space division multiple access (SDMA) Important objectives of computer security include: A. confidentiality B.

In general, performance on a LAN _________ with an increase in the number of devices or the length of the wire. A. increases B. decreases C. fluctuates D. does not change Answer: A Answer: A Answer: A The Wireless Application Protocol (WAP) is: A. proprietary protocol developed in the USA for wireless security B. dependent on the specific network

IPv6 allows three types of addresses: unicast, anycast, and _________. Answer: multicast Answer: multicast Answer: multicast IPSec provides authentication, encryption, and key exchange functions. Answer: T Answer: T Answer: T A malfunctioning device can create a _________ , in which numerous broadcast frames clog the network and crowd out legitimate traffic. Answer: broadcast storm Answer: broadcast storm Answer: broadcast

A broadcast recipient address means that all devices connected to the LAN are to receive the message. Answer: T Answer: T Answer: T The data plus preamble, postamble, and control information are called a _________. Answer: frame Answer: frame Answer: frame Error detection requires that extra bits be introduced into the data stream. Answer: T Answer: T Answer:

Back-end networks are used in situations where a few large computers must be connected for low-volume data transfers. Answer: F Answer: F Answer: F ARPANET was the first message-switching network. Answer: F Answer: F Answer: F VoIP, streaming audio, and streaming video are considered _________ applications even though each involves a single media type. Answer: multimedia Answer:

Two types of distributed data processing are horizontal and _________ partitioning. Answer: vertical Answer: vertical Answer: vertical A router is a more complex intermediate system than a bridge. Answer: T Answer: T Answer: T A stealth virus is explicitly designed to hide itself from detection by antivirus software. Answer: T Answer: T Answer: T The most significant set of

Which of the following is NOT one of classes of function for control signaling? A. establishment B. supervisory C. call information D. network management Answer: A Answer: A Answer: A One type of attack on the security of a computer system or network that impacts the availability of a system (e.g. destruction of a resource in the

The cell loss priority within the ATM cell is similar to the DE bit in Frame Relay. Answer: T Answer: T Answer: T The use of Carrier Ethernet technologies to create metropolitan area networks (MANs) is most commonly called _________. Answer: Metro Ethernet Answer: Metro Ethernet Answer: Metro Ethernet The simplest form of electronic mail is

A key logical component of an IDS is: A. sensors B. analyzers C. user interface D. all of the above Answer: D Answer: D Answer: D The ________ is a company that provides backbone service to an ISP. A. NSP B. CO C. IXP D. CPE Answer: A Answer: A Answer: A Most cordless digital telephone systems used in homes employ ________ or time division

____________ integrates with the operating system of a host computer and monitors program behavior in real time for malicious actions and then blocks potentially malicious actions before they have a chance to affect the system. Answer: Behavior-blocking software Answer: Behavior-blocking software Answer: Behavior-blocking software Switching nodes are devices that enable data to be

Congestion recovery procedures are used to preserve the network during instances of high congestion when the network has begun to drop frames. Answer: T Answer: T Answer: T The most important service an ISP provides is access to other _________ networks. Answer: ISP Answer: ISP Answer: ISP Sliding window is one form of error control. Answer:

The three key objectives of computer security are confidentiality, integrity, and availability. Answer: T Answer: T Answer: T It is desirable to have only one path from sender to receiver to avoid excess costs. Answer: F Answer: F Answer: F ________ is an Internet-based standard and is the framework for developing a complete range of computer communications

Data can exist in either analog or _________ form. Answer: digital Answer: digital Answer: digital A(n) _________ signal is one in which the signal intensity varies in a smooth fashion over time. Answer: analog Answer: analog Answer: analog A(n) _________ signal is one in which the signal intensity maintains a constant level for some period of time

__________ capture keystrokes on a compromised system. A. Worms B. Zombies C. Keyloggers D. All of the above Answer: C Answer: C Answer: C _________ images are the most common type of image being transmitted over today's enterprise networks. A. Color B. Black and white C. Pixilated D. Grayscale Answer: A Answer: A Answer: A Analog signals are: A. continuous B. discrete C. discontinuous D. all of the above

Features of ________ include mailing lists, return receipts, and forwarding. Answer: SMTP (Simple Mail Transfer Protocol) Answer: SMTP (Simple Mail Transfer Protocol) Answer: SMTP (Simple Mail Transfer Protocol) One of the advantages of having a bottom up approach to building a LAN is that individual managers are very close to the group and therefore

The traditional client/server architecture involves two levels, or tiers: a client tier and a _________ tier. Answer: server Answer: server Answer: server The type of network commonly used at business premises is called a __________. Answer: Local Area Network (LAN) Answer: Local Area Network (LAN) Answer: Local Area Network (LAN) __________ binding means that a logical

________ are the branches between exchanges. A. Subscribers B. Subscriber line C. Exchanges D. Trunks Answer: D Answer: D Answer: D Of the three classes of intruders into computer systems and networks, the clandestine user is typically: A. an insider to the organization B. an outsider to the organization C. either an insider or an outsider to the organization D. none

Ethernet requires that each segment be no more than ___________ in length, including the installed cabling and patch cables at either end, for 10-Mbps and 100-Mbps transmissions. Answer: 100 m Answer: 100 m Answer: 100 m When using analog communications, channel capacity is measured in hertz (Hz) where 1 Hz equals 1000 oscillations

Cables and associated connecting hardware whose transmission characteristics are specified up to _________ fall into Category 5 UTP cabling. A. 50 MHz B. 100 MHz C. 150 MHz D. 200 MHz Answer: B Answer: B Answer: B _________ are programs that extract information from name servers in response to client requests. A. Name servers B. DNS C. Resolvers D. IP datagram

The _________ accepts the message submitted by an MUA and enforces the policies of the hosting domain and the requirements of Internet standards. Answer: MSA (mail submission agent) Answer: MSA (mail submission agent) Answer: MSA (mail submission agent) ___________ provides a low-cost, easily scalable approach to achieving very high data rates and is

__________ are the termination points for all of the cabling and where the networking equipment will be located. Answer: Wiring closets Answer: Wiring closets Answer: Wiring closets __________ is preserving authorized restrictions on information access and disclosure, including means for protecting personal privacy and proprietary information. Answer: Confidentiality Answer: Confidentiality Answer: Confidentiality __________ is the primary

Which of the following is the most commonly used standard for computer communications? A. SLA B. TCP/IP C. ISO D. USD Answer: B Answer: B Answer: B A design factor relating to the transmission medium and the signal to determine the data rate and distance is: A. bandwidth B. transmission impairments C. interference D. all of the above Answer: D Answer: D Answer: D When

Nondigital __________ systems use a continuous range of values to represent Information. Answer: analog Answer: analog Answer: analog A __________ is a security service that monitors and analyzes system events for the purpose of finding, and providing real-time or near-real-time warning of, attempts to access system resources in an unauthorized manner. Answer: intrusion

Logical connections in ATM are referred to as __________. Answer: virtual channels Answer: virtual channels Answer: virtual channels ________ is used in fiber-to-the-home (FTTH) systems. Answer: WDM (wavelength-division multiplexing) Answer: WDM (wavelength-division multiplexing) Answer: WDM (wavelength-division multiplexing) System response time and system cost are closely related to each other. Answer: T Answer: T Answer: T The higher the ________

A widely used first-generation system was the ______________, which was widely used in North and South America, Australia, and China through the 1980s and into the 2000s. Answer: Advanced Mobile Phone System(AMPS) Answer: Advanced Mobile Phone System(AMPS) Answer: Advanced Mobile Phone System(AMPS) A _________ is an on-premise telephone switch, owned or leased by

Common examples of data include text and numerical information. Answer: T Answer: T Answer: T A _________ is a facility that provides a data transfer service among devices attached to the network. Answer: Communication network Answer: Communication network Answer: Communication network A hub uses a ________ wiring arrangement to attach stations to the hub. Answer: star Answer: star Answer:

Today, all networked information is sent using digital formats. Answer: F Answer: F Answer: F The five header fields defined in MIME are: MIME version, content-type, content-transfer-encoding, content-ID, and ___________. Answer: content-description Answer: content-description Answer: content-description Communications technologies using data networks have essentially replaced telephone networks in today's business settings. Answer: F Answer: F Answer: F A significant problem

Analog signals differ from digital signals in that: A. analog signals are represented versus time while digital signals are measured versus frequency B. analog signals are periodic, digital signals are not C. analog signals are continuous while digital signals remain at one constant level and then move to another constant level D. analog signals