Answer To: ASSESSMENT BRIEF COURSE: Bachelor of Information Technology Unit Code: DCAN 202 Unit Title: Data...
Kuldeep answered on Oct 18 2021
DCAN202 Content Analysis 1
DCAN 202 Assessments 4 - Content Analysis (Reflective Journal)
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Introduction
It is significant to execute a structure that decreases the number of computing parts needed in the association and provides a simple way to transfer information between different parts of the association. This brings about the need of realizing a computer network that uses transmission media to interconnect numerous computing devices to make sure communication as well as access to remote resources. The network is used by companies to share and communicate data with clients located outside their location. However, the data communication network ensures the possibility of the agenda. It can ensure that the digital form of data (graphics, voice, digital data, photos or text) is correctly transmitted from one mainframe to another mainframe throughout application of a wired or wireless communication platform.
Background
Modern enterprises are using PC’s for daily operations. There are many of these computers, so every computer cannot be owed its own resources, for example servers and printers. Hence, the computer network is designed to ensure that each computing devices in the association can share a centralized resources in a way that does not cause conflicts among requests of individual to network. These computing devices can be connected to the network and can exchange information with each other.
Content Analysis
Week 1
This week’s topic is Introduction to Computer Networks. Commonly, a computer system is an inter-connection of computers in a geographic area using media. According to size of geographical area covered by network, the network can be classified as:
•Local Area Network (LAN)
• Wide Area Network (WAN)
•Personal Area Network
•Campus Network
• Metropolitan Area Network (MAN)
Data communication is mainly the transmission of information in the form of digital or analog signals between several computer network nodes. The network management process includes designing, supporting and installing network components. The network consists of following parts: workstations, switches, servers, network nodes and routers. There are the two models of network architecture: OSI model as well as TCP/IP protocol suite (Al-Fawzan and Hoymany, 2000). The TCP/IP model has five layers: transport, application, network, physical layer, and network access. The OSI model has seven layers: presentation, application, session, network, transmission, physical layer and data link. The logical link only exists in the software, and the physical connection only exists in the hardware.
Interpretation of the contents
Computer network can be executed according to the OSI design and IP/TCP protocol set. Nevertheless, OSI has seven layers, while the IP/TCP protocol suite contains five layers.
Outcome
I learned that the network consists of various layers, each with different mechanism.
Week 2
The topics covered in the second week of lectures are the difference between signal and data, signal composition, signal bandwidth, attenuation, digital coding technology, modulation technology or digitization technology. Information is an entity that conveys meaning, as signals are electrical coded data. The signal has three mechanisms: amplitude, phase and frequency. Generally, attenuation is strength of the signal disappearing in the transmission medium (Berzin, 2010).
However, the main categories of signals as well as data are: analog data sent using an analog signals, digital data sent using digital signals, analog data sent using digital signals, or finally digital data sent using discrete analog signals. Broadly speaking, the main meaning of data code is: many different text characters, and their binary form. For example: Unicode, EBCDIC and ASCII.
Interpretation of the contents
The information in the network is transmitting in the structure of signals in transmission medium. These signals have phase, frequency and amplitude.
Outcome
Now I understand the several combinations of signals and data used in the transmission media.
Week 3
Topics cover: twisted pair cables, coaxial cables and optical fibers, basic cellular, microwave system, or short-term transmission technologies. The transmission medium can be conductive or wireless. Generally, twisted-pair cables are classified by category, from category 1 to category 7. Twisted pair cables help eliminate electromagnetic interference. Has the following characteristics:
• Carry large amounts of data.
• Easy to click.
• Simple to install.
Moreover, the coaxial cables contain a wire covered with braided protective layer and utilize a digital signal, where the cable uses a only digital niformation channel. The optical fiber uses very thin glass cable covered by plastic coating. It can be transmitted over long distances, with faster transmission speed and low attenuation. Wireless media can include radio, infrared and satellite. Nevertheless, terrestrial microwave transmissions have land-based transmission lines (Davies and Tryfonas, 2009). Satellite microwave transmissions involve one station on ground sending to space satellite, as well as the satellite sending to other ground station. In cellular phones, two channels are allocated: one for discussion as well as the other for listening. In addition, Bluetooth is the very short-range technology of transmission. The criteria for selecting the medium include: distance, speed, scalability and price, right of method, safety or environment.
Interpretation of the...