1.1 BACKGROUND TO THE STUDY
A computer network or data network is a
telecommunications network which allows computers to exchange data. In computer
networks, networked computing devices pass data to each other along network
links (data connections). The connections between nodes are established using
either cable media or wireless media. The best-known computer network is the
Internet (Wikipedia, 2015).
Network computer devices that originate,
route and terminate the data are called network nodes. Nodes can include hosts
such as personal computers, phones, servers as well as networking hardware. Two
such devices can be said to be networked together when one device is able to
exchange information with the other device, whether or not they have a direct
connection to each other (Geier, 2001).
Computer networks differ in the
transmission media used to carry their signals, the communications protocols to
organize network traffic, the network's size, topology and organizational
intent. In most cases, communications protocols are layered on (i.e. work
using) other more specific or more general communications protocols, except for
the physical layer that directly deals with the transmission media. Computer
networks support applications such as access to the World Wide Web, shared use
of application and storage servers, printers, and fax machines, and use of
email and instant messaging applications (Wikipedia, 2015).
A wireless network is any type of
computer network that uses wireless data connections for connecting network
nodes. Wireless networking is a method by which homes, telecommunications
networks and enterprise (business) installations avoid the costly process of
introducing cables into a building, or as a connection between various
equipment locations. Wireless telecommunications networks are generally
implemented and administered using radio communication. This implementation
takes place at the physical level (layer) of the OSI model network structure.
Examples of wireless networks include cell phone networks, Wi-Fi local networks
and terrestrial microwave networks.
media uses the antennas for sending and receiving the electromagnetic waves
without using any physical conductors. Radio frequencies (RF) are generated by
antennas that propagate the waves into the air. According to Molisch (2005),
antennas for wireless transmission can be fall under two different categories:
Directional antennas: Directional
antennas are commonly used in point-to-point configurations connecting two
distant buildings LANs, and sometimes point-to-multipoint (connecting two
WLANs). In this, sending and receiving antenna must be properly aligned for
proper transmission. An example of a directional antenna is a Yagi antenna:
this antenna allows you to adjust the direction and focus of the signal to
strengthen the range/reach.
Omni-directional antennas: Omni-directional antennas are used in
point-to multi-point configurations, where they distribute the wireless signal
to other computers or devices in WLAN. An access point would use an
Omni-directional antenna. These antennas can also be used for point-to-point
connections. In this, signal is spread in all directions and can be received by
any antenna which is compatible to receive the signals.
this study is aimed at providing an overview on computer networking with
specific emphasis on wireless network.
1.2 STATEMENT OF THE PROBLEM
Wireless network is a network through
which data signals flow through the air. It’s useful for people to communicate
and access applications and information without wires (Rappaport, 2002). It
allows people to interact with e-mail or browse the Internet from a location
that they prefer. Wireless networks are not bound to a channel to follow like
wired networks. Wireless networking is less expensive and much easier to
install than more traditional wired networking. Wireless networking is used at
the airport, or in hotel lobbies, and a small office or home network etc. The
transmitted distance can be anywhere between a few meters as a television’s
remote control and thousands of kilometers as radio communication.
Wireless network uses the antennas for
sending and receiving the electromagnetic waves without using any physical
conductors. Radio frequencies (RF) are generated by antennas that propagate the
waves into the air (Rhoton, 2001). A detailed overview of wireless network will
be highlighted in this study.
1.3 OBJECTIVES OF THE STUDY
following are the objectives of this study:
provide an overview on wireless network
examine the different types of wireless network
determine the structure and components of a wireless network
analyze the advantages of wireless network
1.4 RESEARCH QUESTIONS
is a wireless network?
are the different types of wireless network?
are the structure and components of a wireless network?
are the advantages of wireless network?
1.6 SIGNIFICANCE OF THE STUDY
study on the computer networking using wireless network has the following
will educate the general public on the details about computer networking with
more emphasis on wireless network. It will also familiarize students and the
general public about the structure and components of wireless network and most
importantly the various types of wireless networks that exists.
research will be a contribution to the body of literature in the area of the
relationship between performance assessment and investment decision, thereby
constituting the empirical literature for future research in the subject area.
1.7 SCOPE OF THE STUDY
study on computer networking using wireless network will provide an overview of
computer networking with more emphasis on wireless networks. It will also cover
all the types of wireless network that exists, structure and components of the
1.8 DEFINITION OF TERMS
an electronic device which is capable of receiving information (data) in a
particular form and of performing a sequence of operations in accordance with a
predetermined but variable set of procedural instructions (program) to produce
a result in the form of information or signals.
connection of computers together in order to make them share information
a global computer network providing a variety of information and communication
facilities, consisting of interconnected networks using standardized
the imparting or exchanging of information by speaking, writing, or using some
is the term used to describe any computer network where there is no physical wired connection between sender
and receiver, but rather the network
is connected by radio waves and/or microwaves to maintain communications.
Geier, J. (2001). Wireless LANs.
Sams;. ISBN 0-672-32058-4.
Molisch, A. (2005). Wireless
Communications. Wiley-IEEE Press. ISBN 0-470-84888-X.
Rappaport, T. (2002). Wireless
Communications: Principles and Practice. Prentice Hall. ISBN 0-13-042232-0.
Rhoton, J. (2001). The Wireless
Internet Explained. Digital Press. ISBN 1-55558-257-5.
Kostas P. (2005). "Wireless Data
Networks". Internet Protocol Journal 8 (1). Retrieved 29 August 2011.
Wikipedia (2015): www.wikipedia.com