Business Data Communications
Test Preparation
Course Introduction
Business Data Communications explores the fundamental principles and technologies that enable the transmission, processing, and management of data within modern organizations. The course covers the architecture and operation of computer networks, focusing on hardware, software, protocols, and security practices used to facilitate business communications. Topics include network topologies, LANs, WANs, the Internet, wireless communications, data transmission techniques, and the impact of emerging technologies on business operations. Students will gain an understanding of how reliable and secure data communication systems support business strategies, improve productivity, and foster innovation in a connected global environment.
Recommended Textbook
Data Communications and Computer Networks A Business Users Approach 8th Edition by Curt
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13 Chapters
1235 Verified Questions
1235 Flashcards
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Chapter 1: Introduction to Computer Networks and Data Communications
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76 Verified Questions
76 Flashcards
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Sample Questions
Q1) One of the most explosive areas of growth in recent years has been cellular phone networks.
A)True
B)False
Answer: True
Q2) What are the benefits of a microcomputer-to-local area network connection?
Answer: Perhaps the most common network connection today,the microcomputer-to-local area network (LAN)connection is found in virtually every business and academic environment-and even in many homes.The LAN is an excellent tool for sharing software and peripherals.In some LANs,application software,such as project management or spreadsheet software,resides on a central computer called a server.Using microcomputers connected to a LAN,end users can request and download an application,then execute it on their computers.If users wish to print documents on a high-quality network printer,the LAN contains the network software necessary to route their print requests to the appropriate printer.If users wish to access their e-mail from the corporate e-mail server,the local area network provides a fast,stable connection between user workstations and the e-mail server.
Q3) ____________________ are personal computers or microcomputers where users reside.
Answer: Workstations
Page 3
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Chapter 2: Fundamentals of Data and Signals
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100 Verified Questions
100 Flashcards
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Sample Questions
Q1) The big disadvantage of the Manchester schemes is that roughly half the time there will be two transitions during each bit.
A)True
B)False
Answer: True
Q2) The range of frequencies that a signal spans from minimum to maximum is called the ____________________.
Answer: spectrum
Q3) The Unicode character set uses ______ bit characters.
A) 4
B) 8
C) 16
D) 32
Answer: C
Q4) The ____________________ of a signal is the position of the waveform relative to a given moment of time,or relative to time zero.
Answer: phase
Q5) The ____________________,or time interval,of one cycle is called its period. Answer: length
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Chapter 3: Conducted and Wireless Media
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103 Verified Questions
103 Flashcards
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Sample Questions
Q1) IEEE 802.16a is a revision of the 802.16 standard that provides a high-speed connection for slowly moving devices.
A)True
B)False
Answer: False
Q2) ____ satellites can be found roughly 1000 to 3000 miles from the Earth.
A) Low-Earth-orbit (LEO)
B) Middle-Earth-orbit (MEO)
C) Geosynchronous-Earth-orbit (GEO)
D) Highly-elliptical-Earth-orbit (HEO) Answer: B
Q3) Category 1 through 7 twisted pair wires can be purchased only as unshielded twisted pair.
A)True
B)False
Answer: False
Q4) ZigBee is a form of wireless technology used within buildings.
A)True
B)False
Answer: True
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Chapter 4: Making Connections
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76 Flashcards
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Sample Questions
Q1) The ____ component of USB strictly specifies the exact dimensions of the interface's connectors and cabling.
A) procedural
B) functional
C) mechanical
D) electrical
Q2) The ____________________ component of an interface deals with voltages,line capacitance,and other electrical issues.
Q3) ____________________ is a technique for interfacing disk storage to a computer via the Internet.
Q4) ____________________ polling is the polling method in which the mainframe computer (primary)polls each terminal (secondary),one at a time,in round-robin fashion.
Q5) The ____ component of an interface deals with items such as the connector or plug description.
A) administrative
B) functional
C) procedural
D) mechanical
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Chapter 5: Making Connections Efficient: Multiplexing and Compression
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96 Verified Questions
96 Flashcards
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Sample Questions
Q1) DSL is capable of achieving speeds into the millions of bits per second.
A)True
B)False
Q2) How does Wavelength division multiplexing work?
Q3) SONET and SDH are able to multiplex varying speed streams of data onto one fiber connection.
A)True
B)False
Q4) In general,the device that accepts input from one or more users is called the ____________________.
Q5) If a compression technique does lose some of the data as a result of the compression process,then it is referred to as a ____ compression technique.
A) complete
B) random
C) lossy
D) lossless
Q6) A T-1 telecommunications line uses a multiplexing technique termed ____________________,which provides for the multiplexing of up to 24 separate channels at a total speed of 1.544 Mbps.
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Chapter 6: Errors, Error Detection, and Error Control
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75 Verified Questions
75 Flashcards
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Sample Questions
Q1) To minimize the effect of echo,a device called a(n)____ can be attached to a line.
A) echo suppressor
B) repeater
C) amplifier
D) hub
Q2) If impulse noise interferes with a digital signal,often the original digital signal cannot be recognized and recovered.
A)True
B)False
Q3) If a receiver has just received one packet of data with bytes numbered 600 to 700,it will respond immediately with ____.
A) an ACK of 700
B) an ACK of 701
C) an ACK of 800
D) it will not respond just yet
Q4) A(n)____________________ is essentially a filter that allows the signal to pass in one direction only.
Q5) The simplest error-detection technique is ____________________ parity.
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Chapter 7: Local Area Networks: Part I
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Sample Questions
Q1) The ______________________________ is an electronic device that performs the necessary signal conversions and protocol operations that allow the workstation to send and receive data on the network.
Q2) By keeping all of the application on the server,the network can control access to the software and can reduce the amount of disk storage required on each user's workstation for this application.
A)True
B)False
Q3) A local area network cannot interface with other local area networks.
A)True
B)False
Q4) A ____ is a device that interconnects two segments of local area networks and acts as a filter.
A) hub
B) switch
C) router
D) satellite
Q5) The main hardware of the switch is called the ____________________.
Q6) What are some of the application areas where a LAN can be an effective tool?
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Chapter 8: Local Area Networks: Part II
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Sample Questions
Q1) Linux software cannot support e-mail servers,Web servers,FTP servers,file/print servers,firewalls,proxy servers,and Domain Name System (DNS)servers.
A)True
B)False
Q2) With a system-based or ____ license,there is rarely a software counter controlling the current number of users.
A) network server
B) interactive user
C) site
D) corporate
Q3) A(n)____________________ is a single unit or box that supports many networking functions.
Q4) A(n)______________________________ is a large,complex program that can manage the common resources on most local area networks.
Q5) ____________________ software is designed to scan an IP address or range of IP addresses for any type of security weakness.
Q6) The type of algorithm that tries to avoid collisions is called
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Chapter 9: Introduction to Metropolitan Area Networks and
Wide Area Networks
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Sample Questions
Q1) ____________________ states that each node takes the incoming packet and retransmits it onto every outgoing link.
Q2) A(n)____________________ network application does not require a logical connection to be made before the transfer of data.
Q3) ____ area networks can cover large geographic distances,including the entire Earth.
A) Personal
B) Local
C) Wide
D) Universal
Q4) A network that expands into a metropolitan area and exhibits high data rates,high reliability,and low data loss is called a(n)___________________________________.
Q5) Briefly explain the most important aspects of a Metro Ethernet.
Q6) Many of the same technologies and communications protocols found in local area networks are used to create metropolitan area networks.
A)True
B)False
11
Q7) How does a virtual circuit packet-switched network work?
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Chapter 10: The Internet
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Sample Questions
Q1) The ________________________________________,which is used by routers and nodes,performs error reporting for the Internet Protocol.
Q2) ____ lets a router represent an entire local area network to the Internet as a single IP address.
A) ICMP
B) NAT
C) ARP
D) UDP
Q3) The TCP header ____________________ field contains a sliding window value that provides flow control between the two endpoints.
Q4) The ____________________ portion of the URL specifies a particular server at a particular site that contains the requested item.
Q5) Like its counterpart IP,TCP is a fairly streamlined protocol.
A)True
B)False
Q6) A(n)____________________ is a precise identification of a particular application on a particular device.
Q7) Briefly explain some of the more common HTTP methods.
Page 12
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Chapter 11: Voice and Data Delivery Networks
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Sample Questions
Q1) The more information you wish to send over a medium,the lower the frequency of the signal you need to represent that information.
A)True
B)False
Q2) _______________ is the term for the convergence of real-time and non-real-time communications services such as telephony,instant messaging,video conferencing,speech recognition,voice mail,and email into a single interface.
A) Big Bundle
B) AT&T
C) Unified communications
D) Frame relay
Q3) ____ are permanent direct connections between two specified points.
A) Tie lines
B) PBXs
C) Centrex
D) IPX
Q4) ATM clearly dominates in the local area network arena.
A)True
B)False
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Chapter 12: Network Security
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Sample Questions
Q1) The DES algorithm works with 128-bit blocks of data.
A)True
B)False
Q2) If e-mail messages have a return address of someone other than the person actually sending the e-mail,then the sender is ____.
A) e-mail bombing
B) spoofing
C) smurfing
D) firewalling
Q3) The concept of two keys,public and private,is called ____ cryptography.
A) private key
B) public key
C) secret key
D) symmetric
Q4) One of the most common ways to control access to a system is to require user IDs and passwords.
A)True
B)False
Q5) The ___________________________________ was selected by the U.S.government to replace DES.
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Chapter 13: Network Design and Management
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Sample Questions
Q1) ___________________________________ is the average time a device or system will operate before it will fail.
Q2) One of the most popular and successful plans currently used by businesses today is the ____.
A) network cycle
B) software-network cycle
C) systems development life cycle (SDLC)
D) distributed cycle
Q3) In a payback analysis,the ____________________ row reflects the total costs for each year times the present value of a dollar for that year.
Q4) The intent of SDLC is for ____ not to be disjointed steps in a big plan,but overlapping layers of activity.
A) cycles
B) phases
C) rounds
D) levels
Q5) A professional called a(n)____________________ typically is responsible for managing a project and following the SDLC phases.
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