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NETWORKS: MOBILE
BUSINESS
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.
SECTION 7.1: CONNECTIVITY: THE BUSINESS VALUE OF A
NETWORKED WORLD
Overview of a Connected World
Bene#ts of a Connected World
Challenges of a Connected World
SECTION 7.2: MOBILITY: THE BUSINESS VALUE OF A WIRELESS
WORLD
Wireless Network Categories
Business Applications of Wireless Networks
7
CHAPTER
SECTION 7.1
NETWORKS: MOBILE BUSINESS
Wireless technologies are transforming how we live, work, and play.
Handheld devices are continuing to o)er additional functionality and cellular
networks are advancing rapidly in their increased speed and throughput
abilities. These enabling technologies are fueling widespread adoption and
creation of new and innovative ways to perform business.
LEARNING OUTCOMES
1: Explain the %ve networking elements creating a connected world.
Network categories: Networks are categorized based on geographic span:
local area networks, wide area networks, and metropolitan area networks.
Network providers: At the top of the hierarchy are national service
providers (NSPs), private companies that own and maintain the worldwide
backbone that supports the Internet. Regional service providers (RSPs)
o)er Internet service by connecting to NSPs, but they also can connect
directly to each other. Another level down are the Internet service
providers (ISPs); recall from Chapter 3 that an ISP provides access to the
Internet for a monthly fee.
Network access technologies: A modem is a device that enables a
computer to transmit and receive data. Broadband is a high-speed
Internet connection that is always connected. Digital subscriber line (DSL)
allows high-speed digital data transmission over standard telephone lines.
Internet cable connections provide Internet access using a cable television
company’s infrastructure and a special cable modem. A T1 line is a type
of data connection able to transmit a digital signal at 1.544 Mpbs.
Network protocols: A protocol is a standard that speci#es the format of
data as well as the rules to be followed during transmission. Network
access technologies use a standard Internet protocol called transmission
control protocol/Internet protocol (TCP/IP); it provides the technical
foundation for the public Internet as well as for large numbers of private
networks.
Network convergence: Network convergence is the e:cient coexistence
of telephone, video, and data communication within a single network,
o)ering convenience and ;exibility not possible with separate
infrastructures. Voice over IP (VoIP) uses IP technology to transmit
telephone calls. Internet protocol TV (IPTV) distributes digital video
content using IP across the Internet and private IP networks.
Learning Outcome 7.2: Identify the bene%ts and challenges of a
connected world.
Before networks, transferring data between computers was time-consuming
and labor-intensive. People had to physically copy data from machine to
machine using a disk. Networks o)er many advantages for a business
including:
Sharing resources
Providing opportunities
Reducing travel
Networks have created a diverse, yet globally connected world. By
eliminating time and distance, networks make it possible to communicate in
ways not previously imaginable. Even though networks provide many
business advantages, they also create increased challenges in (1) security
and (2) social, ethical, and political issues.
CLASSROOM OPENER
HowStu5Works
Start the class by asking students who understands how the Internet works?
How does email go from the University of Denver to Boston University? Or
how does a web page go from client to server back to client?
Go to http://computer.howstu)works.com/internet-infrastructure.htm for an
overview of how the Internet infrastructure works. There are some great
diagrams and easy to understand explanations.
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.
CLASSROOM EXERCISE
The History of Nokia
Ask your students if they know how Nokia started out in business? Chances
are none of them will guess a “wood pulp mill”. 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 #rst Finnish company to manufacture electrical wires
and cables.
1933 - Nokia's #rst car tire, with a summer tread, is launched.
1987 - The #rst 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 #rst 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 #eld was the company's early
investments in digital GSM technology.
1999 - Nokia announces the 7110 model. The phone is the #rst 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 #rst phone with a built-in camera. Nokia 7650
is also the #rst Nokia phone to use the Series 60 software platform.
2002 - Nokia launches its #rst 3G phone, the Nokia 6650.
2003 - Mobile gaming goes multiplayer with the N-Gage from Nokia.
2005 - Nokia introduces the next generation of multimedia devices, the
Nokia Nseries.
2005 - Nokia sells its billionth phone – a Nokia 1100 – in Nigeria. Global
mobile phone subscriptions pass 2 billion.
2007 - Nokia recognized as 5th most valued brand in the world. Nokia
Siemens Networks commences operations. Nokia launches Ovi, its new
internet services brand.
2008 - Nokia's three mobile device business groups and the supporting
horizontal groups are replaced by an integrated business segment,
Devices & Services.
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.
