Type
Solution Manual
Book Title
Business Driven Information Systems 5th Edition
ISBN 13
978-0073402987

978-0073402987 Appendix B Appendix B

April 4, 2019
NETWORKS AND
TELECOMMUNICATIONS
Networks and telecommunications are the transmission of signals over a distance
for the purpose of communication. In modern times, this process almost always
involves the sending of electromagnetic waves by electronic transmitters but in
earlier years it may have involved the use of smoke signals, drums or semaphore.
Today, network and telecommunication is widespread and devices that assist the
process such as the television, radio and telephone are common in many parts of
the world. There is also a vast array of networks that connect these devices,
including computer networks, public telephone networks, radio networks and
television networks. Computer communication across the Internet, such as email
and instant messaging, is just one of many examples of telecommunication.
NETWORKS AND TELECOMMUNICATIONS
Network Basics
Architecture
Topology
Protocols
Media
Ebusiness Networks
LEARNING OUTCOMES
1. Compare LANs, WANs, and MANs.
A local area network (LAN) is designed to connect a group of computers in
close proximity to each other such as in an o(ce building, a school, or a
home.
A wide area network (WAN) spans a large geographic area, such as a state,
province, or country. WANs often connect multiple smaller networks, such
as local area networks (LANs) or metropolitan area networks (MANs).
A metropolitan area network (MAN) is a large computer network usually
spanning a city.
Networks are differentiated by the following:
Architecture—peer-to-peer, client/server
Topology—bus, star, ring, hybrid, wireless
Protocols—Ethernet, Transmission Control Protocol
Media—coaxial, twisted-pair, /ber-optic
2. Compare the two types of network architectures.
Networks and Telecommunications - Instructor’s Manual Page 1 of 6
B
APPENDIX
A peer-to-peer (P2P) network is any network without a central /le server and
in which all computers in the network have access to the public /les located
on all other workstations. A client is a computer that is designed to request
information from a server. A server is a computer that is dedicated to
providing information in response to external requests. A client/server network
is a model for applications in which the bulk of the back-end processing, such
as performing a physical search of a database, takes place on a server, while
the front-end processing, which involves communicating with the users, is
handled by the clients
3. Explain topology and the different types found in networks.
Network topology refers to the geometric arrangement of the actual physical
organization of the computers and other network devices) in a network. The
/ve common types found in networks include:
Bus - All devices are connected to a central cable, called the bus or
backbone. Bus networks are relatively inexpensive and easy to install for
small networks.
Star - All devices are connected to a central device, called a hub. Star
networks are relatively easy to install and manage, but bottlenecks can
occur because all data must pass through the hub.
Ring - All devices are connected to one another in the shape of a closed
loop, so that each device is connected directly to two other devices, one on
either side of it. Ring topologies are relatively expensive and difficult to
install, but they offer high bandwidth and can span large distances.
Hybrid - Groups of star-con/gured workstations are connected to a linear
bus backbone cable, combining the characteristics of the bus and star
topologies.
Wireless - Devices are connected by a receiver/transmitter to a special
network interface card that transmits signals between a computer and a
server, all within an acceptable transmission range.
4. Describe protocols and the importance of TCP/IP.
Transmission Control Protocol/Internet Protocol (TCP/IP) provides the technical
foundation for the public Internet as well as for large numbers of private
networks.
5. Identify the different media types found in networks.
Wire media are transmission material manufactured so that signals will be
con/ned to a narrow path and will behave predictably. The three most
commonly used types of guided media are
Twisted-pair wiring
Coaxial cable
Fiber-optic cable
Wireless media are natural parts of the Earth’s environment that can be used
as physical paths to carry electrical signals.
Networks and Telecommunications - Instructor’s Manual Page 2 of 6
CLASSROOM OPENER
HowStu-Works
www.howstu*works.com provides a wealth of knowledge ranging from computer
basics to network infrastructures. There are several demos and diagrams. Show
your students the site and demo the Internet Infrastructure.
CLASSROOM EXERCISE
Cell Phones and Airplanes
Break your students into groups and ask them to research the Internet to /nd the
reasons why people are required to turn o* their cell phones when they are on an
airplane. There are two reasons why cell phones are not allowed on an airplane:
1. The Federal Communication Commission (FCC) bans the use of cell phones on
airplanes because they could wreak havoc with cell phone systems on the
ground. Signals from your cell phone, when you use it on or near the ground,
reach just a few cell phone nodes near you and the node that is getting the
strongest signal picks up your call. If you move, while driving your car or
walking, the next node picks up the call. From the air, however, your phone's
signal could reach miles, hitting many nodes at once, all with equal strength.
Plus, you are moving at several hundred miles an hour. Cell phone systems were
not designed to handle that.
2. The Federal Aviation Administration, for its part, supports the FCC ban for its
own reasons. They fear cell phones may interfere with navigation and other
aircraft systems.
Incident reports submitted by airline crews also demonstrate the potential for
trouble. NASA's Aviation Safety Reporting System's "Passenger Electronic Devises
Database Report Set" -- which could be subtitled "passengers behaving badly" --
contains several reports of incidents involving passengers whose "personal
electronic devices" seemed to create disturbances in aircrafts' electronic systems.
Nokia is a well known cell phone manufacturer, it is suggested that you go into
some depth on how Nokia got started. Here is the timeline:
1865 - Fredrik Idestam establishes a wood pulp mill on the banks of the
Tammerkoski Rapids. The event is generally considered the starting point for
Nokia's history. The small wood pulp mill quickly grew into a well-established
paper industry.
1871 - Idestam renames his company Nokia Ab. The product range was initially
extended from wood pulp to paper and sulphite cellulose, to be followed by
electricity generation in 1902.
1898 - Eduard Polón establishes the Finnish Rubber Works. During its early
years, the factory produced shoes, boots and overshoes, as well as industrial
hoses and belts.
1912 - Arvid Wickström establishes Suomen Punomotehdas Oy. The company
was the first Finnish company to manufacture electrical wires and cables.
1933 - Nokia's first car tire, with a summer tread, is launched.
Networks and Telecommunications - Instructor’s Manual Page 3 of 6
1987 - The first NMT (Nordic Mobile Telephony, Finnish telecommunications
authorities) portable phone, Mobira Cityman is launched. Prior to this, mobile
phones were in practice installed permanently in cars. Nokia becomes the
third-largest manufacturer or TV sets in Europe. After the acquisition of Oceanic
SA and Standard Elektrik Lorenz (SEL), TVs were Nokia's main business for a
while.
1992 - Nokia announces its first GSM (Global System for Mobile
Communications) mobile, model 1011. The phone's user interface and its design
form the basis of future models.
1993 - Nokia adopts the motto "Connecting People". The motto illustrates
Nokia's contribution to creating wireless connections between people.
1994 - Nokia announces the 2100 mobile phone series. In 1994, the goal was to
sell 500,000 units. Nokia sold 20 million.
1998 - Nokia becomes the world leader in mobile phones. One of the
cornerstones of Nokia's success in this field was the company's early
investments in digital GSM technology.
1999 - Nokia announces the 7110 model. The phone is the first Nokia mobile to
use WAP (Wireless Application Protocol). The WAP browser of Nokia 7110
provides the user with immediate access to the content of Internet pages using
a mobile phone.
2000 - Nokia 9210 Communicator marks the start of the color screen era for
Nokia mobile phones. The versatile device is designed for the business user,
and it is compatible with most o(ce software suites.
2002 - Nokia announces its first phone with a built-in camera. Nokia 7650 is
also the first Nokia phone to use the Series 60 software platform.
CORE MATERIAL
The core chapter material is covered in detail in the PowerPoint slides. Each slide
contains detailed teaching notes including exercises, class activities, questions,
and examples. Please review the PowerPoint slides for detailed notes on how to
teach and enhance the core chapter material.
APPLY YOUR KNOWLEDGE
Instructor Note: There are few right or wrong answers in the business world.
There are really only efficient and inefficient, and effective and ineffective business
decisions. If there were always right answers businesses would never fail. These
questions were created to challenge your students to apply the materials they
have learned to real business situations. For this reason, the authors cannot
provide you with one version of a correct answer. When grading your students’
answers, be sure to focus on their justification or support for their specific answers.
A good way to grade these questions is to compare your student’s answers against
each other.
1. NETWORK ANALYSIS
Networks and Telecommunications - Instructor’s Manual Page 4 of 6
Project Purpose: To implement a wireless network.
Potential Solution: There are a number of advantages to implementing a
wireless network such as using a PDA to /nd information while walking around
the club. Customers could connect to the wireless network with their own
laptops to check email and perform work while at the club. Wireless iPods are on
the market and customers could download songs and podcasts while working
out. The numbers of advantages of a wireless network are endless. However,
the club should also be aware of the security issues associated with a wireless
network.
2. SECURE ACCESS
Project Purpose: To begin to understand how vulnerable all computer
networks are and the security features needed to protect them.
Potential Solution: There are a variety of answers here. Students should
separate their responses according to software and hardware:
Software
oVirus protection software is crucial to network security. These software
programs scan all data entering a network from any outside source for
known viruses and warn of any viruses encountered to avoid corrupting
network software. Updates for virus software are made available through
the vendor, usually on a subscription basis.
Hardware
oProtection against unauthorized access from outside a network is usually
provided through some sort of /rewall service. Firewalls are either
computers or routers that are set up to provide a secured “doorway”
through which users can access the Internet and Internet users can
access Web data. Firewall services can be con/gured to meet specific
security needs. They can be set up to screen Internet users trying to
access a network, and to allow only certain authorized employees to
access the Internet from within a network.
oIn addition, many /rewalls now feature remote authorization for
employees using a remote (o*-site) Internet connection to access
restricted network resources. Other non-Internet applications for /rewall
services include protecting mainframes or subnetworks from general
access within an organization and ensuring con/dentiality of data
transmitted across networks.
3. TELECOMMUNICATION OPTIONS
Project Purpose: To research current telecommunication technologies and
their attributes.
Potential Solution: Here is another exercise that students should /nd
interesting and “hot.” This may take some outside research, but encourage
students to think on their own to answer this. Some responses might include:
Improving communication between employees and customers
Video conferencing/ Web conferencing
Short-notice meetings
Problem-solving brainstorm sessions
Networks and Telecommunications - Instructor’s Manual Page 5 of 6
4. FRYING YOUR BRAINS
Project Purpose: The disadvantages to wireless networks
Potential Solution: Researching the issues related to using
telecommunication equipment can be enlightening as more and more people
use technology from a younger age we are seeing many issues, such as
ergonomics. Encourage your students to create a product that reaches this
growing market as more and more people suffer from computer related illnesses
such as carpel tunnel syndrome.
5. HOME NETWORK EXPERIENCE
Project Purpose: To understand how easy it is to implement a home network
Potential Solution: Many of your students already have experience
implementing a home network. A simple Google research on setting up a home
network will provide your students with videos and detailed information on how
easy this task is to accomplish. For a twist on this activity also ask your
students to research how to “hack” a home network.
6. THE INTERNET IS ALMOST FULL
Project Purpose: To understand IPv4
Potential Solution: Here is another exercise that students should /nd
interesting and “hot.”
Networks and Telecommunications - Instructor’s Manual Page 6 of 6

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