Sunday, January 26, 2020

Computer Network Fundamentals

Computer Network Fundamentals Harpreet Singh   Elements of computer communication. Computer Communication plays vital role to connecting two different devices and share the common information with each other and this information can be anything like text or video. To communicate from one computer to other it required some essential elements i.e. sender, receiver, medium, message and protocol. The Main parts or components of Data communication system are as Follows:- Sender Message Receiver Medium [ Communication channel ] Protocols Sender. The initial stage of communication is starts with sender. Sender is the person or machine who sends the message or start communicate with other devices. Sometime it is also called as transmitter. Message The secondary stage is creating message or idea and statement is to be communicated. A message can be verbal, text, number, picture etc. Medium [Communication channel] Medium is the intermediate of the communication channel. In other way medium is the technique which transmitted message from a sender to receiver. It is also called communication channel.   The source used in medium can be a wire, fibre or optical cable and telephone lines etc. Receiver Receiver is the person or the device which receives the message send by sender. The receiver can be a computer, printer, email or telephones etc. Protocol Protocols can be defined as a gathering of strategies which oversee correspondence of information between the PCs. Some protocol which are very commonly used in communication are HTTP(Hypertext transfer protocol), FTP(File transfer protocol), SSL(Secure socket layer) , TCP(Transmission control protocol),PPP(Point to point protocol). Identify the types of transmission:- Types of Transmissions Transmissions is transferring information between two devices. Basically there is three modes of transmissions i.e. simplex, half duplex, full duplex and these transmissions modes can also called as communication modes. However unicast, multicast, broadcast is also consider as transmissions. (Study tonight, n.d.) Simplex: In this mode data can be transmitted only via one way i.e. communication is unifacial. We cannot send back data to the Sender. The best example of simplex mode is Televisions and remotes. Half Duplex: In this mode data can be transferred from both sides but only one at a time, which means when the sender sends the data at the same time receiver cannot send the message to sender. For instance walkie talkie in which we transmit information one at a time and that information sent in the both ways. (Study tonight, n.d.) Full Duplex: In full duplex data can be transmitted from both directions, so it means it is two way communication. In this sender can sent message at the same time receiver also send message. The example of full duplex is Mobile phone in which both user can talk. (Study tonight, n.d.) Unicast:   Unicast is the transmission between a single sender and single receiver. For example browsing a website. Multicast: Multicasting is the transmission where a group of receivers wants to transmit with single sender. For example Wi-Fi in which there are multiple user access single medium i.e. Wi-Fi. Broadcast: Broadcasting is when we send message to multiple user and they all are able to read that same message this is called broadcasting. For watching T.V in which multiple user access a same program which is broadcast. Identify the types of transmission for the following use cases: Mr Smith is walking in the street and looking for a residence address. He is new in this city and do not understand the address code of residence. Then he asked a pedestrian Do you know where this is? This is the Unicasting transmission in which there is a new person ask to another person for address so it means there is single and single receiver. Lecturer said student with odd number student ID will join in STREM A. This is Multicasting transmission in which Lecturer is a sender and students with odd number are the group of receiver. Lecturer delivers the lecture in the class room. This is also Multicasting transmission in which lecturer is a sender and group of receiver is the student who access his lecture. Watching a TV. This Broadcasting transmission in which multiple user access same program. Two police men communicate with each other over walkie-talkie. This is the Half-duplex transmission in which a single information is transmitted at a time and information is send in the both ways. Mr John made a phone call to his wife that he will be late today. This is Full-Duplex transmission in which date is transmitted from both ways. (A) Describe the difference between packet and circuit switching. Circuit Switching When the two machine communicate over a specific communication path, it is called as circuit switching. There is always required pre-described route from where data should be move and no other data is allowed. In circuit switching to transmit the data firstly circuit must be established so that data can be transmitted. There are three phases from which all the application using circuit switching have to pass through: 1 Establish a circuit 2 Transfer the data 3 Disconnect the circuit Circuit switching was intended for voice applications. Phone is the best reasonable case of circuit switching. Prior to a client can make a call, a virtual way amongst guest and call is set up over the system. (Tutorials point, n.d.) Packet Switching (PS) In packet switching the whole message is separated into small pieces is known as packet switching. The switching data sum up in the header of each packet and exchange separated. It is always easier to all devices in the network which are intermediate with each other to store small size packets. As we can see in the figure packet can follow any path to reach the destination. Best suitable example for packet switching is internet. Packet switching the internet uses packet switching technique. Packet switching enables the user to differentiate data streams based on priorities. Packets are stored and forwarded according to their priority to provide quality of service.(Tutorials point, n.d.) DIFFRENCE BETWEEN PACKET SWITCHING AND CIRCUIT SWITCHING(rfwireless-world, n.d.) Describe the multiplexing Network. There are many multiplexing networks. Network multiplexing list is below. Time Division Multiplexing:- TDM is applied principally on digital signal yet can be applied to analog signal also. In TDM the common channel is isolated among its client by the method of the time slot. Every client can transmit information inside the given time slot only. Digital signals are isolated in frames, proportionate to time slot i.e. frames of an ideal size which can be transmitted in given time slot. Frequency-Division Multiplexing:- In FDM every signal is allocated its own particular frequency range inside a bigger frequency band. The frequency range for the channel cannot cover. Frequency bands are regularly isolated by an unused block of the frequency range to diminish interference. FDM is utilized mostly for simple transmissions. It can be utilized over both wired and remote mediums. The best example of FDM is FM radio. Code-Division Multiplexing:- Multiple data signal can be transmitted over a solitary frequency by utilizing code division multiplexing. FDM isolates frequency into the small channels yet CDM permit its clients to full bandwidth and transmit the signal all the time utilizing remarkable code. CDM always uses orthogonal codes to spread signals. Wave-Division Multiplexing:- Light has the diverse wavelength (colors). In fibre optic mode, various optical transporter signs are multiplexed into an optical fibre by utilizing diverse wavelengths. This is a simple multiplexing method and is done adroitly in an indistinguishable way from FDM, however, utilizes light assigns. Describe the Performance Factor. Latency:- The term Latency to any of a few sorts of postpones commonly brought about in handling of system information. A network connection that phases a little delay time is knows as low latency, on other side high latency is totally opposite of low latency in which network experienced long delay. Throughput: Throughput is the bulk of traffic which a network can tackle at any one time. For example higher the lanes on the motor way it will accommodate higher traffic as similar in the network if the bit rate is higher than it will transfer the data at higher rate but responding time would be the issue if the response is slow then your network might be not having the enough throughput. (Blog Wildpackets, n.d.) Bandwidth:- Bandwidth is defined as a range with in a band of frequencies or wavelengths (Webopedia, n.d.). Bandwidth describes the speed rate of the network and the maximum data is transfer if the bandwidth of the network is higher. Jitter:- Jitter is basically delaying of packets to reaches its destination at different time and the order in which packets were send may be disorder. In other words loss of voice packets while communicating with other person is caused by the jitter. Response time:- Response time is the elapsed time between an inquiry on a system and the response to that inquiry. (Techopedia, n.d.) Response time is the time that shows the users are accurately exchanging the information or devices are connect with each other. Describe the types of network based on geographical. Local Area Networks (LAN):- A Local Area Networks (LAN) as name shows it will cover only a local area a smaller part of an area like a small office, school or a house. A LAN transfer data at much higher than MAN WAN. A LAN can be install in two ways either wired or wireless based on Ethernet. Sharing of storage, printer and common files is possible on LAN but there is the possibility of conjunction because if all the users access these resource on the same time on the single LAN then it will take some time.  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚     Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚     Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚     Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚     Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€š   Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚     Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚     Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚     Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚     Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚     Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚  Ãƒâ€šÃ‚   (Udemy, n.d.) Metropolitan Area Network (MAN):- Metropolitan Area Network (MAN) usually cover the larger area as compared to LAN. It will cover the cities or small towns or organization to provide higher speed of data transmission. MAN is used when you want to connect two or more computer to communicate with effective speed. The technologies used in MAN is ATM (Asynchronies Transfer Mode), FDDI (Fibre Distributed Data Interface) etc. (Udemy, n.d.) Wide Area Network (WAN):- Wide Area Network (WAN) is usually cover higher geographical are like cities, countries, towns. WAN is the mixture of the LAN and MAN which are interconnect with each other so that the user who wants to communicate from different places are able to send data or information at higher speed. WAN is connected through satellite, public network etc. WAN is usually very expensive as compared to other networks. (Udemy, n.d.) Blog Wildpackets. (n.d.). Retrieved from http://blog.wildpackets.com/: http://blog.wildpackets.com/2011/05/31/four-factors-that-affect-your-network-performance.html rfwireless-world. (n.d.). Retrieved from rfwireless-world.com: http://www.rfwireless-world.com/Terminology/circuit-switching-vs-packet-switching.html Study tonight. (n.d.). Studytonight. Retrieved from Studytonight.com: http://www.studytonight.com/computer-networks/transmission-mode Techopedia. (n.d.). Retrieved from https://www.techopedia.com: https://www.techopedia.com/definition/9181/response-time Tutorials point. (n.d.). Retrieved from tutorialspoint.com: https://www.tutorialspoint.com/data_communication_computer_network/physical_layer_switching.htm Udemy. (n.d.). Retrieved from https://blog.udemy.com: https://blog.udemy.com/lan-wan-man/ Webopedia. (n.d.). Retrieved from http://www.webopedia.com: http://www.webopedia.com/TERM/B/bandwidth.html

Saturday, January 18, 2020

Film Methodologies †Point Break (1991) Essay

Many different methodologies are vital when examining film. Different aspects and methods of cinema analysis provide critics and audiences with various approaches to establishing certain genres or films. This essay will examine the specific methodologies of the action genre, a consideration of the art cinema and an auteur study. These styles are recognized in Kathryn Bigelow’s Point Break (1991) which provides strong examples of these techniques. An action film is commonly recognized by audiences. The action film portrays strong characteristics and identifiable elements unique to the action genre. Fights, stunts, cars, foot chases, sex appeal and explosions are fundamental sequences of the action genre whereas; character development and well thought-out plot lines are often overlooked. The action genre therefore develops a stereotype that characterizes a film by incorporating such certain elements. Bigelow’s Point Break is stereotypically an action film, as it embodies these, and many more aspects essential to the action genre. Many events in Point Break centre on powerful adrenaline pumping action sequences. Fighting takes place frequently and in many different environments. These situations build tension and provide entertainment. Fist fighting is not the only conflict confronted in Bigelow’s film. Shootouts involving rifles, pistols and shotguns are believed to be essential classics to a good action film. The predominant theme of bank robbery incorporates a mixed bag of violence, weapons and aggressive language. These events evoke powerful emotions from all characters on-screen, creating stronger action elements. Stunts involving explosions intrigue audiences. The imagery of a building or car exploding into the air is typically high intensity action. The situation before, during and after such events provides compelling entertainment. High spectacle stunts and effects are commonplace in the action genre such as Point Break. Both car and foot pursuits are worth noting in the films action archive. High speed car chases deliver an adrenaline and intensity only action audiences are frequent too. This intensity in Bigelow’s film heightens during the foot chase between Reeves and Swayze. Finally, sex appeal and the portrayal of the human body in the film, provides a core of entertainment in Point Break. Through its social theme of surfing and its objectification of both topless men and women, the genre contributes to its already profound stenotype. We must consider these themes in relation to an action genre study to entirely understand and examine and analyze the film Point Break; however, these are not the only themes and features to consider when establishing methodologies specific to the action genre. There are elements of art house technique evident in Bigelow’s Point Break. Although typically an action genre film, it not only controls emotion, mood and style through themes and events on screen but also through its use of audio and visual manipulation. Focusing on visual styles Bigelow echoes a complexity, often introducing elements resembling art house aesthetics. The less conventional filming methods utilized in Point Break reveals an array of long shots, point of view shots, use of intensified continuity and quick cutting. The films themes primarily revolve around the typical action genre story which provides the film with a lot of its power. However, it is worth taking into account what and how these art cinema traits take affect to an audience in Bigelow’s film. Long shots, usually of conversations frequently occur throughout Point Break. These shots sustain a level of depth many other films lack in the action genre. For example, during the fourth scene there is a long pan between Reeves and his partner. This could be used as a rendition of the conventional shot-reverse-shot film technique. The camera moves from left ? right slowly however, because the camera is moving on a semi circle dolly track, we are able to view the conversation from an array of different angles. This stops the need for frequent cutting between shots and shot sizes. Long takes and shot size manipulation are well known examples of art cinema examples in Point Break. Although not common in the action genre, they are uniquely obvious in this film. A framed long shot of Reeves and Swayze stays stationary as they walked towards camera, however the camera continues to frame them from long wide shot ? mid shot. This is very interesting as conventional cinema pieces tend to change shot angles and sizes frequently to make their films visually entertaining. Handheld point of view (POV) shots balance emotion and intensity with reality. Through the use of first person perspectives, Bigelow is truly able to direct audience’s attention and emotions. This method of filmmaking provides a uniquely odd action characteristic. Bank robbery is one of the main themes in Bigelow’s Point Break. The intense topic of armed robbery and violence creates powerful emotions. Intensified continuity and frame cutting allows Bigelow’s film to multiply tension and fear while its being played out onscreen. Shot sizes change repeatedly giving strength to specific visual keys and detail. Bigelow’s attention to vision extends to even the smallest technical details in Point Break. Thus scenes of heightened intensity can not only be controlled by what characters and events are taking place, but that of the camera movement and sound direction. These are the technical elements of art cinema throughout Point Break. Finally, by examining the auteur study of Point Break we must analyze the films director and creative owner. In this auteur study we will examine Kathryn Bigelow, her previous works and inspirations in tie to Point Break. The director was born in California in 1952 and is one of the only female directors to achieve successful Hollywood fame. Her films usually concern the male dominated arena of big budget action cinema. Bigelow has been noted to revise genres similar to violence, voyeurism and sexual politics. Point Break’s genre mix of bank robbery and surfing makes it obvious that Bigelow has a desire to consistently approach and push cinematic boundaries. Her marriage to big time director James Cameron could have provided Bigelow with a stepping stone into the industries top elite. Bigelow first entered the cinema by way of the art world. Her flair for traditional masculine genres in respect to Point Break is exampled by her previous works such as Blue Steel (1990) and art house film The Loveless (1981). Both films clearly represent Bigelow’s style of masculinity action mixed with art house cinema. Bigelow is essentially an important contemporary auteur. In conclusion, methodologies are vital when examining film. Throughout this essay we have analyzed the action genre, a consideration of art cinema and an auteur study. All these methodologies are recognized in Kathryn Bigelow’s Point Break (1991). By concluding with these studies we have deduced that different aspects and methods of cinema analysis provide critics and audiences with various approaches when establishing genre and film. References Allon, Y. Patterson, H. Cullen, D. Contemporary North American Film Directors: A Wallflower Critical Guide. n/a. Published: Wallflower Press n/a. 2003. {http://qqq. cercles. com/review/r11/jermyn. html} n/a {http://movies. yahoo. com/movie/contributor/1800091098/bio} A Strange Gaze. {http://www. popmatters. com/pm/books/reviews/39697/cinema-of-kathryn-bigelow/} 5. 10. 07

Thursday, January 9, 2020

One Easy Tip About Research Paper Writers Online Exposed

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Wednesday, January 1, 2020

Essay on Cause and Effect Solar Energy - 668 Words

Cause/Effect: Solar Energy Solar radiation is an energy resource many times larger than mankind’s energy needs. Mankind has been able to capture/harness this energy resource, but only on a limited scale. Mankind has found that the use of the sun was quite useful. They used it to grow and dry crops, dry clothing, produce heat, and for light. The sun is a sphere, on the inside of the sun there is a continuous process of fusion in which hydrogen nuclei combine to from helium nuclei. There is less helium than that of hydrogen, which allows the sun to create energy. The energy is then radiated out of the surface of the sun, in which only a small portion is intercepted by plant earth. Just outside of the earth’s atmosphere, approximately 93†¦show more content†¦In order to stop the damage that is being done to the environment, we need to switch to an environmentally friendly energy production system. If we do not switch, the current facilities who rely mainly on foss il fuels, will continue to destroy the earth because they are leaving behind toxic residues and wasteful by products that will have to be dealt with for many years. The future lies with systems that eliminate these toxic and wasteful by products. Only by switching to fully renewable energy systems will humanity be free of these toxins. With our current technology and the expanding knowledge of tomorrow, wind turbines have a 30 year life span. The effort used to run these turbines is lower than the use of traditional power plants. Using wind energy to power turbines instead of plants using fossil fuels for energy will reduce the overall impact of the U.S. Energy production. The before mentioned solar panel has a life expectancy of approximately 25 years. The total cost per kilowatt is way lower for solar panels than that of fossil fueled based power plants. These panels, once installed, need little to no maintenance. There is no monthly bill or added fees. Just like wind energy, sola r energy is completely sustainable and they do not produce any physical by products. I believe that wind and solar energy is the perfect solution to the future of preserving the earth’s environment. Our environment is turningShow MoreRelatedHow Long Can We Continue Using Fossil Fuels Without Detrimental1322 Words   |  6 Pagesdetrimental effects? With every passing moment our planet is slowly becoming contaminated with the fossil fuels we use and the green house gases they emit. Not only do fossil fuels contaminate the planet we live in, but they also cannot be replenished and will run out eventually. We cannot reverse these effects, however i think there is one alternative energy source that scientists have been working on that can be incorporated to reduce the damage. 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