W4 : Connecting a Network (Cabling & Hardware)

In this chapter, it will explain about networking software, wired network-types of cables and networking and their functions.

• wired network - types of cables 

Source : http://www.noblemc.co.za/Suppliers/CoaxialCableSuppliers.aspx

- coaxial cable connector uses Bayonet-Neil-Concelman (BNC) connector. 

Source : https://www.fiberoptictel.com/ftth-project-outdoor-and-indoor-cables/

- fiber optic cable able to transmit signals over longer distances.

-it transmit light and eliminate the interference.

-for example, unifi.  

- fiber optic uses ST & SC connector.

Source : https://blog.tripplite.com/what-is-the-difference-between-shielded-and-unshielded-network-cables/

shielded twisted pair :

- provide more reliable data communication.

- however the disadvantage is extra shielding cause large 

unshielded twisted pair :

- it has 4 pairs of wires

- it has different number of twists to remove interference.

Week 3 : Computer Networking

Definition of computer network :

A group of computing devices connected via a form of communications technology so that network users can share hardware, software, data and they can communicate with each other between computer devices, transmission media to send/ control data/ signals, communication devices to transmit/ send data from sources to destinations, and software.




Source : http://www.conceptdraw.com/solution-park/computer-and-networks


Type of Network

• Local Area Network is used for small geographical area. For example home, schools, and office building. It allows file exchange, emails, printer sharing and accessing the Internet. 
• Metropolitan Area Network to serve metropolitan area. 
• Wide Area Network is a network that serves large geographical area. This network allows people especially who involves in business to communicate and carry on activities no matter how far their locations. 
• Above networks are depending on the geographical area. 

Network Component

• Host/End Nodes - data source

• Transmission Media - to transmit data and controls signal.There are two types of transmission media, bounded and unbounded. Bounded (wired) has twisted pair wire, coaxial cable and fiber optic cable. 

• Unbounded (wireless)

• Network Electronic Device - control data from source to destination. It also connect multiple network or connect computer or network to the internet. 

Source : https://fossbytes.com/networking-devices-and-hardware-types/

• Applications/Software - The applications involves technique and protocols. Protocols discover the rules and procedure to send data, terminate data, interpret data, present data and control mistakes. It ensure data is delivered at its destination. It also control data transmission. 

Source: http://www.ab.com/linked/drives/drvappsw/

• Network Architecture Standard & Protocol - It covers how device in a network typically correct and how the device communicate. It also enable devices to communicate to each other.
• Network architecture consists of two types, client/server networks and peer to peer networks.  

Network Topology

• the arrangement or mapping of the elements of a network. There are two types of network topology, physical and logical. 

Source : https://apessay.com/order/?rid=6a3801bf32902ab5

• Logical Network Topology 

Week 2 : Data Communication

What is data communication?

Data communication happened between two devices that are connected by a point-to-point transmission medium. 

Data transmission.

• Data transmitted over the network can be in various ways.
• Factors that affect data transmission are bandwidth, types of signals, transmission type and timing and delivery method. 
• Bandwidth is amount of data that can be transferred in a given time period. Bandwidth can be measured by bits per second. 
• There are two types of signal in data transmission, they are analog and digital signals. 
• For analog, the data represent in continuous waves form. 
• there are two types of data transmission, serial transmission and parallel transmission. 

Source : https://www.slideshare.net/nisreenbmadanat/digital-communication-systems-28574971

• After data is sent, the reconstruction of data happened by synchronous transmission, asynchronous transmission, and isochronous transmission. 
• Synchronous is widely used and data comes in groups or blocks forms. 
• Whereas asynchronous is not widely used and there is a start bit and stop bit. 
• Isochronous is data sent at the same time, there is also initial communication to determine the bandwidth and other factors needed for data transmission. 
• There are three direction of transmission. 

Source : http://www.camiresearch.com/Data_Com_Basics/data_com_tutorial.html

• Last but not least is delivery method. In this part, there are three types of delivery method. Firstly, circuit switching, secondly packet switching and thirdly broadcasting. 

Week 1 : Introduction to Telecommunication

What is communication?



Communication is the imparting, conveying, or exchange of thoughts, messages,ideas, knowledge or information through sign and sounds. For example, speech, signals, writing or behavior. There are also communication model, The Shannon-Weaver Mathematical Model, 1949.



What is telecommunication?


Telecommunication is the exchange of information by electronic or electrical devices over a long distance. A complete telecommunication arrangement has transmitter and receiver.




source : Wikipedia



Timeline of Computer Technology 




source: http://www.donloadsofts.com/computer-history.htm 





The Elements of Computer 

There are six elements of computer. It consists of people, procedure, data/information, hardware, software, and communications/connectivity.

• There are two categories of people involved in computer and telecommunication; professional and end user. 
• A procedure is a set of tasks to perform some action. 
• Data is a representation of facts, concepts, or instructions in a formalized manner for communication, interpretation, or processing by humans or by automated ways. There are a few unit for data. The units are bit, byte, kilobyte, megabyte, gigabyte, and terabyte. 
• Next, hardware refers to any physical objects that are part of the computer system. There are five categories of hardware which are input, process, output, storage and communication devices. 
• Whereas software is a instructions that controls the functioning of the computer. It consists of a computer program that describe a set of tasks to be carried out by a computer. Software has two types, there are application software and system software. Application software includes database programs, word processors, Web browsers and spreadsheets. System software includes operating systems, computational science software, game engines, industrial automation, and software as a service applications.
• Last but not least is communication. It includes the conversion of data between analog and digital.