Archives

Commercial use of the Internet was discouraged until approximately 1988. 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 SMTP […]

Two types of transmission media recently gaining in popularity in business communications are __________ connections and fiber optic cables. The antenna systems on or near the earth are referred to as earth _________ . Answer: stations Four categories of 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 ______________. Important objectives of computer security include: A. confidentiality B. integrity C. […]

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 The Wireless Application Protocol (WAP) is: A. proprietary protocol […]

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

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

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

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

Which of the following is NOT one of classes of function for control signaling? A. establishment B. supervisory C. call information D. network management One type of attack on the security of a computer system or network that impacts the […]

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

A key logical component of an IDS is: A. sensors B. analyzers C. user interface D. all of the above The ________ is a company that provides backbone service to an ISP. A. NSP B. CO C. IXP D. CPE […]

____________ 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. Switching nodes are devices that […]

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

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

Data can exist in either analog or _________ form. A(n) _________ signal is one in which the signal intensity varies in a smooth fashion over time. Answer: analog A(n) _________ signal is one in which the signal intensity maintains a […]

__________ capture keystrokes on a compromised system. A. Worms B. Zombies C. Keyloggers D. All of the above _________ images are the most common type of image being transmitted over today’s enterprise networks. A. Color B. Black and white C. […]

Features of ________ include mailing lists, return receipts, and forwarding. 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 understand the needs of […]

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

________ are the branches between exchanges. A. Subscribers B. Subscriber line C. Exchanges D. Trunks 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 […]

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. When using analog communications, channel capacity is measured in hertz (Hz) where 1 […]

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 _________ are programs that extract information from name servers […]

The _________ accepts the message submitted by an MUA and enforces the policies of the hosting domain and the requirements of Internet standards. ___________ provides a low-cost, easily scalable approach to achieving very high data rates and is used in […]

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

Which of the following is the most commonly used standard for computer communications? A. SLA B. TCP/IP C. ISO D. USD A design factor relating to the transmission medium and the signal to determine the data rate and distance is: […]

Nondigital __________ systems use a continuous range of values to represent Information. 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 […]

Logical connections in ATM are referred to as __________. ________ is used in fiber-to-the-home (FTTH) systems. Answer: WDM (wavelength-division multiplexing) System response time and system cost are closely related to each other. Answer: T The higher the ________ rate, 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. A _________ is an on-premise telephone switch, owned or leased by an organization […]

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

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

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 […]