Wireshark IP Routing

Wireshark IP Routing Introduction To complete this study, I have had three Virtual machines running at once. Two of these Virtual Machines were running Ubuntu and one was running FREEBSD acting like a router between the two Ubuntu machines. Configured Each machine to the specified IP addresses beforehand and set two NAT Networks up as required in the study. Once all was set up I double checked IP addresses of both Ubuntu machines by opening terminal and typing in ifconfig which then confirmed that both machines networks were working correctly. Furthermore, I have used the ping command to send an ICMP packet to NAT Networks to confirm both Ubuntu machines are connected to the right network. (See below) Â   Fig.1 ifconfig Fig.2 ping NAT Network Fig.3 ICMP Echo Request message IP information Select the first ICMP Echo Request message sent by your computer, and expand the Internet Protocol part of the packet in the packet details window. What is the IP address of your computer? The IP Address of my computer is 10.0.3.4 . I found this out by looking at the Source and thats where packets were sent from so I know that will be my IP address also in the Internet Protocol version 4 it says Src: 10.0.3.4. Within the IP packet header, what is the value in the upper layer protocol field? Within the header, the value in the upper layer protocol field is ICMP(1). How many bytes are in the IP header? How many bytes are in the payload of the IP datagram? Explain how you determined the number of payload bytes. There are 20 bytes in the IP header and 60 bytes total length this gives 40 bytes in the payload of the IP datagram. To determine the number of payload bytes all you need to do is take away the IP header size which in this case is 20bytes from the total length which in this case is 60 bytes and the remainder is the number of payload bytes. Has this IP datagram been fragmented? Explain how you determined whether or not the datagram has been fragmented. The more fragments is= 0 so the data is not fragmented. I looked at the Flags drop down and there it determines if a packet is fragmented or not and in this case more fragments was 0 also Fragment offset is also =0. Which fields in the IP datagram always change from one datagram to the next within this series of ICMP messages sent by your computer? Time to live, Identification and Header checksum always change. The identification is a unique number assigned to each packet so it always has to change as a result of this the Header checksum will change and the Time to live will change with it too. Which fields stay constant? Which of the fields must stay constant? Which fields must change? Why? The fields that stay constant across the IP datagrams are: Version (since we are using IPv4 for all packets) Header length (since these are ICMP packets) Source IP (since we are sending from the same source) Destination IP (since we are sending to the same destination) Differentiated Services (since all packets are ICMP they use the same Type of Service class) Upper Layer Protocol (since these are ICMP packets) The fields that must stay constant are: Version (since we are using IPv4 for all packets) Header length (since these are ICMP packets) Source IP (since we are sending from the same source) Destination IP (since we are sending to the same dest) Differentiated Services (since all packets are ICMP they use the same Type of Service class) Upper Layer Protocol (since these are ICMP packets) The fields that must change are: Identification(IP packets must have different ids) Time to live (traceroute increments each subsequent packet) Header checksum (since header changes, so must checksum) Describe the pattern you see in the values in the Identification field of the IP datagram IP header Identification fields increment with each ICMP Echo (ping) request. I found this out by scrolling through each ICMP Echo request (ping) and looking at how Identification field values change. Fig.4 ICMP TTL exceeded reply, IP Info What is the value in the Identification field and the TTL field? Identification: 0x01a9(425) TTL:64 Do these values remain unchanged for all of the ICMP TTL-exceeded replies sent to your computer by the nearest (first hop) router? Why? The TTL will remain unchanged because the first hop router is always the same. Identification field for all ICMP TTL-exceeded replies will change because it is assigned a unique value. When two or more IP datagrams have the same identification value that means that these IP datagrams are fragments of a single large IP datagram. Fig.5 ICMP Echo Request packet size = 2000, First segment 10. Find the first ICMP Echo Request message that was sent by your computer after you changed the Packet Size in pingplotter to be 2000. Has that message been fragmented across more than one IP datagram? Yes, this packet has been fragmented across more than one IP datagram. I found this out by looking at the info tab on my Wireshark as it clearly states Fragmented IP also, I checked each one to see under Flags if the More segments is set to a value or not. 11. Print out the first fragment of the fragmented IP datagram. What information in the IP header indicates that the datagram been fragmented? What information in the IP header indicates whether this is the first fragment versus a latter fragment? How long is this IP datagram? Under the Flags bit for More Fragments it is showing that the datagram has been fragmented. Since the fragment offset is 0, we know that this is the first fragment. This first datagram has a total length of 1500 including the header. Fig.6 ICMP Echo Request packet size= 2000, second fragment Print out the second fragment of the fragmented IP datagram. What information in the IP header indicates that this is not the first datagram fragment? Are the more fragments? How can you tell? I can tell that this is not the first fragment since the fragment offset is 1480. It is the last fragment since the more fragments flag is not set. What fields change in the IP header between the first and second fragment? The IP header fields that changed between the fragments are: total length, flags, fragment offset and checksum. Fig.7 ICMP Echo Request packet size=3500, first fragment How many fragments were created from the original datagram? After switching to 3500, there are 3 packets created from original datagram. What fields change in the IP header among the fragments? The IP header fields that changed between all of the packets are: fragment offset and checksum. Between the first two packets and the last packet, we see a change in total length also in the flags. The first two packets have the total length of 1500 with more fragments bit set to 1 and the last packet has a total length of 540 with more fragments bit set to 0.

Dreaming of Time Travel Essay

The reading â€Å"Dreaming of Time Travel† discusses applications of time machine, whether time travel is possible and how time travel can be explained in terms of physics and quantum mechanics. The author highlights such issues as meeting yourself in the past, time as fourth dimension, many-world theory, self-consistency, concepts of wormhole and star trek. It is a matter of fact that human imagination has been always captured by opportunities of time travel as it would give an excellent opportunity to see own past and perspectives for future. Science is interested in time travels the most as it would help to solve historical and scientific conflicts and controversial points. Of course, if people had time machine, they would definitely visit twenty-third century to look for technological advances and to find effective ways of cancer treatment. Nevertheless, time travels may change the past and, consequently, future would be changed as well. You may seven slip out of existence as a result of change. It would be possible to kill Hitler preventing, in such a way, World War II and save millions of innocent deaths. People would be able to participate in historical events shaping them. Moreover, it would be possible to meet historical figures as, for example, Buddha, Moses, Cleopatra or Shakespeare. Actually, there is no limitation of possibilities. Time travel makes people feel free to move around the world, but they may be helpless as they are not acquainted with cosmic order. Nowadays the issue of time travel has become a matter of interest for physicists, not only for fiction writers. For example, when Wells wrote his famous â€Å"The time Machine† many believed that it was impossible to travel through time and space. It is Einstein’s Universe that makes time travel possible and understandable. Therefore, many physicists are actively investigation time travel to the past. In his ideas Einstein uses the concept of time as fourth dimension. This idea is used to show that time can be measured by moving and stationary observers. Therefore, Einstein argues that our universe is four-dimensional. The idea of many-world theory is also very interesting as it offers radical alternative of viewing our world. Many-world theory is based primarily on quantum mechanics developed in the beginning of the 20th century. Quantum mechanics was used to explain the behavior of molecules, atoms and other micro-particles. Quantum mechanics proved that particles had wave nature. It is assumed that people won’t change the pass if they travel because they are a part of it. However, Einstein viewed it as paradox. Therefore, the concept of self-consistency was introduced to explain the possibility of historical changes. It seems that self-consistency is rather controversial to the common sense of free choice and free will. Therefore, time travelers are likely to be constrained being deprived of essential human ability. For example, David Lewis argues that free will never allows people to do logically impossible things. Four-dimensional world doesn’t change as it is viewed as fixed sculpture. Time-travel stories are also based on self-consistency system. In time travel the particles have world line meaning that there is a circle with no ends. Such particles are called jinn. They are claimed to arrive by wizardry as in Aladdin’s story. Often fiction literature involves scientific investigation of time travel. For example, â€Å"Star Trek† fiction encourages further time-travel investigation from scientific perspective. It stresses that it is possible to use warp-drive to ravel in past. Fiction often stimulates scientific thinking. Physicists are the most interested in time travel as they want to test the boundaries and opportunities of physical laws, as well as to patent a time machine. The author concludes that time travel seems so strange for people simple because they aren’t accustomed to meet time travelers in our everyday life. If people meet them everyday, they won’t be surprised. If time travel can occur in principle, scientists will receive new insights about the universal order. Works Cited Gott, J. Richard. Time Travel in Einstein’s Universe: The Physical Possibilities of Travel Through Time. NY: Houghton Mifflin, 2001. 3-32.

Enterprise Architecture as Strategy Essay

Technology is shifting at a faster rate resulting in development of new methods that assist in completion of certain technological demand. This has given birth to different enterprise architecture frameworks that fulfill the requirements of day-to-day activities. Architecture is a framework of guidelines, principles, models, standards and strategies that directs, construction and development of business process, design and information and resources through enterprise. Hence, enterprise architecture is a blueprint, which defines the structure and operation of a given organization (Fowler & Rice 2003). Thus, a foundation in which an organization can determine how to achieve current and future aims. There are many types of EA frameworks with specified capabilities. Some of these frameworks include ToGAF, Zachman, FEAF, DoDAF and EAP. The aim of this paper is to analyze ToGAF, and analyze how it compares with other EA frameworks. The Open Group Architecture Framework (TOGAF) is an enterprise architecture framework, which approaches the development of enterprise information architecture through design, planning, governance and implementation. This EA framework employs four pillars to achieve its goals: Application, Business, Technology and Data. Before the architect plans for current and future aims of the organization, they are provided with foundation architectures that form the basis that they will use for the new development. The four pillars play a crucial role in ensuring that the process is successful. Business architecture allows the definition of governance, business strategy, the organization and any other important processes of the given organization. Applications architecture allows the provision of the blueprint for the specific application to enable the interaction, deployment and create relationships between the important business processes of a given organization. Data architecture describes the structure of the given organization and defines physical and logical data assets that are in the given organization. Technical architecture defines the software, hardware and network infrastructure that is in place and the required technical resources to accomplish the mission in question. The original aim of the TOGAF was to design and develop technology architecture for a given business entity. However, the framework has evolved becoming a methodology that is used to analyze overall business architecture. This resulted into splitting of the enterprise methodology into two parts: Architecture Development Method (ADM) and Enterprise continuum. The ADM ensures that the enterprise architecture meets the requirements of the organization in terms of business needs and information technology needs. Its ability to be tailored ensures that organizational needs are factored in each of the different execution steps of the architecture planning process. The process is usually cyclic and iterative because the entire process is split into phases. The ADM supports nine phases; the first is the preliminary and the second to the ninth ranges from Phase A to Phase H. Each phase requirements are checked and ensured that it fulfills its basic needs. For example, Phase C combines Application and Data architecture and phase B and C ensure that the clarity of the information architecture is achieved (Lankhorst 2005). For the ADM to be successful, Enterprise Continuum comes handy. Generally, the Enterprise Continuum can be seen as a ‘virtual repository’ of all the assets of the architecture that is in an organization. These assets may include architectural patterns, architectural models, architecture descriptions and other important artifacts. Enterprise Continuum brings together Solutions and Architecture Continuum. The Architecture Continuum structures the re-usable architecture assets, which brings together representations, rules, relationships of information systems that are available to the enterprise. The Solutions Continuum defines the blocks that are used by the Architecture Continuum. This then allows the architectural building models and blocks that assists building the architecture design and eliminates ambiguity during analysis and implementation of the process. Usually there is a relationship between the different EA frameworks in terms of how it operates and ways that enables it to accomplish its duties. Zachman Framework and TOGAF ADM part share some common features. ADM mapping in relation to the Zachman Framework supports a correlation. The Zachman Framework has a well established and comprehensive taxonomy that supports various models, viewpoints and other important artifacts, which an enterprise may consider developing as a phase of the EA (White 2007). The Zachman Framework covers the 30 cells, but the TOGAF does not cover all the cells. However, it is possible for the TOGAF to develop viewpoints to accomplish aspects of Zachman Framework. Nevertheless, there are some viewpoints that are supported by TOGAF, which are not included in the Zachman Framework. For example, the missing viewpoints include manageability and security. The purpose of the architecture is to define viewpoints, an aspect that is supported by the TOGAF ADM but lacks in Zachman Framework. Zachman Framework vertical axis provides a source of potential viewpoints while the horizontal may provide generic taxonomy concerns. Thus, the Zachman Framework does not have means for processes for conformant views or developing viewpoints. Hence, it does not employ a perspective that is shown by TOGAF’s ADM. FEAF structure resembles with TOGAF because it is portioned into Data, Business, Technology and Applications Architectures. Thus, it contains guidance that is analogous to TOGAF architecture and its architectural viewpoints and perspectives. However, the rows that are in the FEAF matrix do not directly map to TOGAF structure. However, the mapping of ADM to Zachman Framework has some correlation between TOGAF and FEAF. Hence, the columns that are in the FEAF matrix correspond to the three architecture domains that are supported by TOGAF; the fourth TOGAF domain covers business architecture that lacks in the FEAF structure. Enterprise Architecture Planning (EAP) is a framework that brings together Applications, Information and Technology Architectures in fulfilling the requirements of architecture. Thus, it shares many concepts with TOGAF because the aim of EAP is to form blueprints for architectures to solve business problems. Moreover, EAP supports the nine phases that are supported by the TOGAF (White 2007). The first three phases in the EAP (Business Architecture) maps to the Phase B of TOGAF ADM. Baseline Description, which is the step 4 in EAP maps to Phases C and D of TOGAF ADM. These are some of the basic features that both frameworks share. However, EAP does not support taxonomy of various views and viewpoints when compared to the TOGAF architecture. Department of Defense Architecture Framework (DoDAF) defines the architecture systems into consistent and complementary views. It defines a structure and mechanisms that help in understanding, visualizing and assimilating the complexities and broad scope of a given architecture design through tabular, graphic and textual means. Thus, it shares minimal aspect with TOGAF. In fact, TOGAF focus on the methodology of architecture in terms of â€Å"how to† without bringing into consideration architecture description constructs. This perspective is different when it comes to the DODAF architecture. DoDAF main functionality focus on the architecture through a given set of views without any specified methodology, a perspective that is different from TOGAF, which has a specific methodology (Bernus & Fox 2005). ADM guides the way that TOGAF operates, an aspect that is less exhibited in the DoDAF. This is because the purpose of architecture determines description of use and supports a well tailored process to fulfill the requirements of the EA (McGovern & Ambler 2003). DODAF requires that all information, analysis and products to build should be put forefront before building the architecture. However, TOGAF specify certain requirements that should be in place and grouped into the four pillars. DoDAF supports three â€Å"views† System, Operational and Technical while the TOGAF support four views. However, â€Å"views† in DoDAF differs from the view that is seen in the TOGAF. Deliverables and artifacts that are defined in the DoDAF have no corresponding parts in the TOGAF ADM. This is because DoDAF goes deeper in determining details of the specific architecture. Thus, DoDAF are at the system design level rather than in TOGAF, which is in the architecture level. Nevertheless, the level of detail can be included in the ADM especially at Phase B, C and D of the TOGAF. Enterprise Architecture plays an important role in ensuring that the business strategy and the requirements of a certain process are achieved. TOGAF approach is useful in achieving a business-oriented process through a well defined methodology. TOGAF have common features and minor differences with other EA such as the Zachman, FEAF, DoDAF and EAP. The view and viewpoint that is incorporated by the TOGAF ensures that the requirements of the organization are achieved. Thus, TOGAF plays an important role, which is envisaged by other Enterprise Architecture Framework. It fulfills the requirements that it is assigned, however, fulfills it different from the other EA frameworks. References Bernus, P. & Fox, M. (2005). Knowledge Sharing in the Integrated Enterprise: Interoperability Strategies for the Enterprise Architect. London: Birkhauser. The book addresses Enterprise Architectures and Enterprise Integration in a way that makes it easy to utilize Enterprise Models and other Modeling Tools. It brings together the different models and forms of a framework into fulfilling a requirement. Thus, it develops interchange models between the given modeling tools, maintain its interdependencies and knowledge on the re-use of enterprise models. The authors also provide means towards the achievement of the ISO9001:2000. The book brings into consideration Design of Information Infrastructure Systems for Manufacturing (DIISM’04) and International Conference on Enterprise Integration and Modeling Technology (ICEIMT’04). Fowler, M. & Rice, D. (2003). Patterns of Enterprise Application Architecture. New York: Addison-Wesley Publishers. The book provides proven solutions to the problems that are experienced by information system developers. The book utilizes code example in terms of C+ and Java. The book turns the problems that are associated with enterprise applications developers into a new strategy that eliminates these problems and ensures that the developers are in an environment that they can easily embrace. The authors’ helps professionals to understand complex issues associated with architecture. The book shows that architecture is crucial in completion of application development and multi-user environment. In addition, the book provides patterns and context in EA that enables the reader to have proper means to make the right decisions. Lankhorst, M. (2005). Enterprise Architecture at Work: Modeling, Communication, and Analysis. New York: Springer. The authors bring clearly the complexities that are associated with architectural domains. It brings into consideration description of the enterprise architecture and fulfillment into an organization in terms of processes, structure, systems, applications and techniques. The book brings into consideration description of components and unambiguous specification to allow for a logical modeling language. They utilize their skills in ensuring that the architects have concrete skills that fulfill the architectural practice. It also gives means that allows communication between stakeholders that are involved in these architectures. The authors also provide means to assess both qualitative impact and quantitative aspects of the given architectures. Modeling language that is utilized has been used in real-life cases. McGovern, J. & Ambler, S. (2003). A practical Guide to Enterprise Architecture. New York: Prentice Hall PTR. The authors of the book have hands-on experience in solving real-world problems for major corporations. The book contains guidelines that assist the architects to make sense of the systems, data, services, software, methodologies, and product lines. The book also provides explanation of the theory and its application to the real world business needs. Perks, C. & Beveridge, T. (2003). Guide to Enterprise IT Architecture. New York: Springer Publishers. The book brings into consideration different Enterprise Architecture frameworks. The authors’ clearly explains development of a modeling concept through various technical architecture, e-business and gap analysis. Moreover, the book brings into consideration operating systems and software engineering principles. Moreover, the book relates EA with service instances, distributed computing, application software and enterprise application integration. Ross, J. & Weill, P. (2006). Enterprise Architecture as Strategy: Creating a Foundation for Business Execution. Chicago: Harvard Business Press. The aim of EA is to define the requirements of an organization in terms of job roles, standardized tasks, infrastructure, system and data. Moreover, the book also gives guidelines in the way that organizations will compete in a digitalized world providing managers with means to make decisions and realize visions that they had planned. Thus, the book explains EA vital role in fulfilling the execution of a given business strategy. The book provides thoughtful case examples, clear frameworks, and a proven and effective way of achieving EA. Scheer, A. & Kruppke, H. (2006). Agility by ARIS Business Process Management. New York: Springer Publishers. The authors’ brings into consideration the benefits that are associated with utilizing of varies EA frameworks. It brings into consideration the various differences that are seen in each EA framework. Moreover, the authors explores the benefits that will result if a given framework is utilized in a given business strategy. Thus, the book is business oriented with EA playing an important role. Schekkerman, J. (2003). How to Survive in the Jungle of Enterprise Architecture Frameworks, 2nd Ed. New York: Trafford Publishers. This book defines the role that is played by enterprise Architecture Frameworks bringing clearly the main difference between the common Enterprise Architecture Frameworks. This book provides the right procedures and means that can allow selection of the right Enterprise Architecture Framework. The book further gives the history and overview of various Enterprise Architecture Frameworks and the capabilities that the specified Enterprise Architecture. Some common features of EA that the book explores are principles, purpose, scope, structure, and compliance and guidance to ensure that the right EA is chosen. Wagter, R. & Steenbergen, M. (2005). Dynamic Enterprise Architecture: How to Make it work. New York: John Wiley and Sons Publications. The authors of the book present a way towards EA that enables organizations to achieve the objectives of their business. The book focuses on governance of the IT organization, advice and strategies provide tangible tools that assist in the achievement of the goals of the organization. If all the directives are followed the organization will achieve its goals at a faster speed. White, J. (2007). Managing Information in the Public Sector. New York: M. E. Sharpe. The book covers the basis of information technology, political and managerial issues that revolve the EA. This book is specifically written for the public and it covers all problems that are related to IT and the public.

Illegal Immigrants The United States - 1174 Words

Each year about 2.5 million Illegal immigrants attempt to cross the border, only about 100,000 and less make it through. Illegal immigrants come to America for a better life. They have gradually increased over time since the 1800’s. Illegal immigrants can come from all parts of the world, but most them come from spanish speaking countries (South and Central America). Most Americans believe illegal immigrants are a problem to the U.S.. Also, Illegal immigrants are believed to be bringing crime, but that s only a small percent of them. One act committed by a criminal cannot be used to judge all virtuous men and women. There are different ways to enter the U.S. illegally, the basic and the only methods are by land, sea, and even air (airplane). The most commonly used method is by land, crossing by land allows the migrator to have a higher chance of succeeding. A high amount of migrants come to America for a better job opportunity and/or escaping criminal activity back in their h ome country. Although the reason for their arrival is constantly repeated to most Americans, they still don’t understand the situation. Illegal immigrants are stilled leered by many Americans, so deportation becomes a possible solution. Deportation could decrease their population, but it could open a gap to another issue, the U.S. economy. The U.S. economy is something delicate, something that can’t be played around with. Investing in deporting illegal immigrants won’t do anything positive for theShow MoreRelatedIllegal Immigrants : The United States1392 Words   |  6 PagesJoseph Lema Professor Ferrell English 1470 19 Oct 2017 Illegal Immigration Illegal immigrants are coming into the United States at an alarming rate and it is affecting the United States in negative ways. Immigrants are drawn to America to escape poverty, corrupt government, crime, severe danger, drugs, or persecution in their own countries. Immigrants that come to the United States of America are supposed to apply for a Visa when they first arrive. To get a Visa, the peopleRead MoreIllegal Immigrants And The United States1303 Words   |  6 PagesAs history has shown, millions of immigrants have flocked to the United States in attempts to find a better life. The complexity of immigration is much greater now than it was in the early 1900’s. Most immigrants arriving on boats to Ellis Isle would have only been denied if they were deemed to be a criminal or with disease. Individuals must now endure an extensive application process to obtain a green card or visa. Without one of these documents, the person is considered to be here illegally. To dayRead MoreIllegal Immigrants And The United States1248 Words   |  5 Pagesa half million unauthorized immigrants in the United States in 2014. 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