OSI Model: In this class I had learnt about the which is interesting because which it plays a vital role in the IT all the web browsers , sending and receiving the information and opening a web page is basically by using the OSI MODEL in which it is made up of seven layers Application layer ,Presentation Layer ,session layer , Transport layer, Network Layer ,Data link Layer and physical layer From the application layer to the Network layer are implemented by the end users whereas the bottom three are implemented by all the nodes in the path. In application layer user interacts with the systems this layer provides protocols in which the applications communicate with each other means application layer is our browser or Gmail application if we are sending a mail. The Presentation layer is basically the operation system layer in which the application layer sends the information to the operation layer. The Session layer deals with the communication creating the session between the two communications which means this layer allows users of different machines to create a session between. Session layer can bind all these different streams belong to same application .Transport layer receives data from the session layer and divide into smaller units and these information are passes to the network layer on the receivers end it make sure these messages are accepted and arranged in the correct order .The network layer breaks message into packets and transmitted them across the network this layer take cares that the packets reach the correct destination. This is called as routing. Data link layer in which the switches operates and it breaks the packets into smaller units called frames these frames are passed to the physical layer for transmiss... ... middle of paper ... ...ng for work this is also one type of risk it is good until we handle when we cannot handle then there will be a risk but it is convenient so we are using. Coming to the threats I had come in-detail about denial of service, unauthorized access and many more. Coming to the part of firewalls which will be useful in our personal lives so that we can have an advantage of choosing the best one. We had come across types of firewalls and there advantages and which is best one. Coming to the secure devices we had learned about dial back systems, virtual private networks. Coming to the attacks I had learned about Trojan horses, software bugs, sniffers. There are many businesses depended on this network security like online banking, business processes etc. I had also got an idea on hacking and in what ways they hack. Everyone in the organization is responsible for the security.
Question 2-1 The OWI (the United States Office of War Information) was an extension of the United States government, created during World War II. It was created in order to deliver propaganda both at home and abroad. Through radio broadcasts, newspapers, posters, photographs, films and other forms of media, the OWI was the ultimate connection between the battlefront and it’s civilian communities. a. BMPA – Bureau of Motion Picture Affairs – i. As mentioned above, during the US’s involvement in World War II, the Hollywood film industry became extremely involved with the government in order to support its war-aims information campaign through film and other forms of media. Following the declaration of war on Japan, the government created the Bureau of Motion Picture Affairs in order to better coordinate the production of entertainment features (film) with more patriotic, morale-boosting themes and messages emphasizing the “American way of life”, the nature of the enemy and the allies, civilian responsibility on the home front and of course, the fighting forces themselves.
The 802 committee and the OSI model both relate to one another. The OSI model shows how the layers of the internet are able to communicate and function with each other. While the 802 committee will add onto that by showing how network protocols should function. With that being said there are numerous working groups under the 802 committee however the one that I will be writing about is the 802.2 or the logical link control (LLC). The logical link control is in the 2nd layer (data-link) of the OSI model. The purpose of this protocol is flow and error control along with multiplexing and demultiplexing. How multiplexing works is by getting multiple data streams and combining them into one shared stream. This is mainly seen in the common forms
The internet works on the basis that some computers act as ‘servers’. These computers offer services for other computers that are accessing or requesting information, these are known as ‘clients’. The term “server” may refer to both the hardware and software (the entire computer system) or just the software that performs the service. For example, Web server may refer to the Web server software in a computer that also runs other applications or it may refer to the computer system dedicated only to the Web server applicant. For example, a large Web site could have several dedicated Web servers or one very large Web server.
OSI – Open Systems Interconnection - is reference model for how applications can communicate over a network. A reference model is a conceptual framework for understanding relationships.
An example of a highly important protocol which will be utilized at application level, is HTTP or hypertext transfer protocol. HTTP is the protocol used within web browsers and the entire internet to send and receive specific web page data. HTTP is a controlling protocol, as it determines how documents should be sent, and what the browser should do in response to commands. When accessing a web page, a HTTP command is sent to the pages web server, so that the server may send that specific page’s data to the user. PCO’s Learning Centre will be using the hypertext transfer protocol on a regular basis. In order for students to access web pages, the HTTP must exist to ensure speedy and accurate navigation, especially in a learning
...work Security Article). With this given information in the essay, is a great start to learn how to keep your network secure. This is only a small part of the prevention of infiltration of your network and computer. If one desires to learn more, go above and beyond and continue to learn on how to keep your network secure.
ABSTRACT : This paper describes the basic threats to the network security and the basic issues of interest in designing a secure network. it describes the important aspects of network security. A secure network is one which is free of unauthorized entries and hackers. INTRODUCTION
An Open Shortest Path First (OSPF) protocol is the most used interior gateway protocol and computation intensive protocol where energy consumption in Internet Protocol (IP) networks is the main concern. The energy in an IP network can be saved by allowing a subset of IP router interfaces on sleep mode setting during the low traffic hours through the model of “move” by dint of an Energy Aware Routing (EAR) strategy, which is completely compatible with OSPF and is based on the “Shortest Path Tree (SPT) exportation” techinque or “Dijkstra's Algorithm”. In case of heavy traffic hours, the EAR strategy is not usable and may cause denial of service. The strategy implemented can help a network operator to control the network performance and allow a smoothed QoS degradation. This performance evaluation study permits to save about 30% of network links with a insignificant rise of link loads and network path lengths.
...vantage of the overall network design and implement usable subnets with virtual local area networks. Use encryption and encapsulation to secure communications of public segments to enable extranets and cross-Internet company traffic. Use items such as intrusion detection systems and firewalls to keep unauthorized users out and monitor activity. Taken together, these pieces can make a secure network that is efficient, manageable, and effective.
In our effort to address the barriers to healthcare access, our mission is to improve our clients well-being and health outcomes by providing medical, mental, and preventive services for individuals with a history of chronic homelessness. With a collaborative effort aided by the case management and outreach currently offered by the Watts Labor Community Action Committee (WLCAC), the mobile clinic will provide additional supporting services that will focus on bringing mental health services, healthcare and social services directly to our clients. As we strive to integrate our services by collocating a mobile clinic, we will focus on disease prevention and healthcare promotion through primary care, while employing a biopsychosocial approached with the goal of optimizing wellness within the population we serve. The objectives outline for the medical outreach program will focus on improved quality of care by using every advantage that is presented with a collocated model and the cross discipline solving techniques that will be available with coordinated care. This holistic approach will include a care team that will bring additional resources and will also focus on being the link to additional comprehensive services while monitoring treatment and outcomes. The integration of services can also prove to be cost effective by the flexibility it offers and by consolidating the resources currently available at WLCAC. The program will also be sustainable by using the working relationships it will have with other community health providers and by using the educational services provided by the University of Southern California. Providing medical services that touch upon primary care practice guidelines,...
The TCP portion of TCP/IP operates at level 3 (Network) as its primary function is to control the flow of data. IP operates at level 4 (Transport) of the OSI model. IP is the protocol responsible for the actual transmission of packets across the network. What are the benefits of the OSI model? There are several advantages to the layered approach provided by the OSI model.
OOP is a programming language model organized around Objects rather than "actions" and data rather than logic. a program has been viewed as logical procedure that takes input data and processes it, and return the output data.
Network management planning and security planning involves identifying the best and most appropriate systems and hardware that the firm can use to better manage network and plan security systems. Therefore, the management required me to examine the best software and hardware systems in the market place that the company can adopt to enable it to manage the network and security. The management required me to advice on the implementation procedure of various plans that are going to be adopted. My responsibility also involved finding out or predicting the impact of the plan on the future operations. They required me to evaluate the challenges the company might face while adopting the changes in the network management plan and security plans.
As a computer administrator one must be aware of what the system requirements are for the operating system being used or installed on a system. Computer administrators that install operating systems on new or old hardware often will research what the manufacturer suggests for the operating system to work properly. The requirements for an operating system can be broken down into two categories hardware requirements and software requirements.
ErrealMedia (2010) Network standards OSI Reference Model; History of OSI Model; OSI Layers in Action http://www.erealmedia.com/cms125/