Comparison of Networking Feature of Linux and Microsoft Essay Example for Free

Comparison of Networking Feature of Linux and Microsoft Essay 1.0 Comparing Networking Features of Linux Microsoft. Microsoft * Next Generation TCP/IP Stack: this networking feature of windows is available for â€Å"Windows Server 2008† and â€Å"Windows Vista†. It is a â€Å"complete redesign of TCP/IP functionality for both Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6) that meets the connectivity and performance needs of todays varied networking environments and technologies.† Joe Davies (2008) * Server Message Block 2.0 (SMB): this networking feature of windows is also available for both â€Å"Windows Server 2008† and â€Å"Windows Vista†. It can also be termed as the â€Å"Common Internet File System (CIFS)†. It is used on widows-based computers as a default file sharing protocol. SMB supports: * â€Å"Sending multiple SMB commands within the same packet. This reduces the number of packets sent between an SMB client and server. * Much larger buffer sizes compared to SMB 1.0. * Increases the restrictive constants within the protocol design to allow for scalability. Examples include an increase in the number of concurrent open file handles on the server and the number of file shares that a server can have. * Supports durable handles that can withstand short interruptions in network availability. * Supports symbolic links.† Joe Davies (2008) * Windows Firewall: the windows firewall for the versions â€Å"Windows Server (2008)† and â€Å"Windows Vista† has support for filtering of incoming and outgoing traffic. It also has integrated settings for firewall filtering and Internet Protocol Security (IPSEC). * Network Driver Interface Specification (NDIS) 6.0: this â€Å"specifies a standard interface between kernel-mode network drivers and the operating system. NDIS also specifies a standard interface between layered network drivers, abstracting lower-level drivers that manage hardware from upper-level drivers, such as network transports.† Joe Davies (2008). Linux * Samba: this networking feature of â€Å"Linux† is a file and printer sharing service. It is based on the SMB protocol developed by â€Å"Windows†. Samba allows â€Å"Linux† to act as a SMB client or server. * The inetd Super Server: this is a special network daemon run on â€Å"Linux† applications in order to overcome certain inefficiencies of network daemons. It â€Å"creates sockets on behalf of a number of services and listens on all of them simultaneously. When an incoming connection is received on any of these sockets, the super server accepts the connection and spawns the server specified for this port, passing the socket across to the child to manage. The server then returns to listening.† Dawson T. (2000). * The tcpd Access Control Facility: this is a tool that is used to manage â€Å"host specific† access. â€Å"For TCP services you want to monitor or protect, it is invoked instead of the server program. Tcpd checks if the remote host is allowed to use that service, and only if this succeeds will it execute the real server program.† Dawson T. (2000). 1.1 Interoperability Features of Ubuntu with Microsoft Workstations. Interoperability is the function which allows a system to work with other systems that may be of different brand or have a different operating system. For organisations like â€Å"Rainham Indigo Bank† who wish to setup a networking environment to share files and printer, this is important as they wish to integrate a Linux based operating system to their current work environment which has a Windows based operating system. â€Å"Ubuntu†, the choice of Linux – based operating system, has an interoperability feature known as â€Å"Samba† that supplies the users with file and printer sharing for the Window workstations. Samba.org states that â€Å"Samba is an Open Source/Free Software suite that provides seamless file and print services to SMB/CIFS clients. Samba is freely available, unlike other SMB/CIFS implementations, and allows for interoperability between Linux/Unix servers and Window s-based clients.† The bank can use this package to share printers and files between the Ubuntu server and Widows workstations. Another feature that â€Å"Ubuntu† offers is the ease of authentication. Authentication plays an important part as it helps computers on a network to recognise each another and allows for information to be shared. â€Å"Ubuntu Server† comes with â€Å"Open Lightweight Directory Access Protocol (LDAP)†. This ensures that a shared directory service can be built if it is needed. Supported versions of Ubuntu Server come with â€Å"Likewise-Open†. This is used to integrate with the system using Microsoft Active Directory. Machines on Active Directory can be identified, share credentials and access resources with â€Å"Ubuntu† machines through the use of this software. Resources for Windows clients can easily be provided by â€Å"Ubuntu† servers without an additional security burden. 1.2 Installing Ubuntu and configuring network services for Windows and Linux for file sharing and printing. â€Å"Ubuntu† Installation. After â€Å"Ubuntu† was installed, â€Å"Samba† was downloaded and configured. It was installed through the terminal command using this command: â€Å"sudo apt-get install samba samba-command†. Configuring network settings. Ubuntu accessed via Microsoft. Sharing folders on the network. File manager opened to allow for folder sharing. Sharing folder on Windows from Ubuntu. Shared folder in Microsoft. 1.3 Linux Distribution Costs. Performance The cost associated with the performance is related to the hardware of the â€Å"Ubuntu† server as the server’s performance will be as good as the hardware installed on it. The performance of the server depends on the type of memory installed and how much of it, the brand of the processor as well as its type i.e. single – core, dual – core etc, the processor speed will also play a part in this as well as the motherboard installed and the PCI connectors and serial buses installed.. â€Å"Ubuntu† server process threads often make use of physical resources. High performance can be achieved from relatively low hardware requirements on this server. Therefore, the cost of performance associated with the â€Å"Ubuntu† server is expected to be low. Security Once the â€Å"Ubuntu† server is hardened, it has a low risk of attacks from viruses, remote procedure calls and buffer overflows. Standard installation of â€Å"Ubuntu† has a ready – to – use hardened operating system. Therefore, no additional cost will be needed to implement additional security protection such as anti-virus, firewalls, anti-spyware etc. This is because most security mechanisms are pre-installed or can be installed freely thereby allowing this cost to be low. Support Support for the â€Å"Ubuntu† software can only be obtained from the â€Å"Ubuntu† community, developers and enthusiasts as there are no formal support arrangements available from the vendor. Significant cost will be incurred in order to train staff to use of the server and experienced consultants may be required for support for cases of server downtime or repair. Maintenance Maintenance of the server may incur significant costs as well. This is because only skilled and trained personnel can conduct routine maintenance and maintain the maximum uptime of the server that is required. The maintenance cost of hardware can vary depending on the hardware. From a software perspective, the costs will include maintenance from skilled personnel to upkeep and patch the software as needed.

Albert Einstein Essays -- Essay s Papers

Albert Einstein Einstein was born on March 14, 1879, in Ulm Germany. He lived there with his parents, Herman and Pauline. After a year in Ulm, due to the failure of his father's electrical and engineering workshop, the Einstein family moved to Munich (the capital of Bavaria), where after a year in residence there, Einstein's mother had Maja, Einstein's sister. Despite the fact that he was Jewish, from age five until age ten, Einstein attended a Catholic School near his home. But, at age 10, Einstein was transferred to the "Luitpold Gymnasium," where Latin, Greek, History, and Geography were pounded into childrens' heads. His parents wanted him to finish school, get his diploma so he could go to a University, and then become an electrical engineer. But Einstein had other Ideas for his future. Einstein's father wanted him to attend a university but he could not because he did not have a diploma from the Gymnasium. But there was a solution to this problem over the Alps, in Zurich, there was The Swiss F ederal Institute of Technology which did not require a diploma to attend. The one thing it did require was the applicant to pass an entrance exam. But then yet another problem arose, most scholars were 18 when they entered the institute, and Einstein was only 16. Einstein took the risk, and in the autumn he was dispatched over the Alps. Einstein took the exam, but did not pass. The principal of the school was impressed with his abilities, so he was admitted to the cantontal scho... Albert Einstein Essays -- Essay s Papers Albert Einstein Einstein was born on March 14, 1879, in Ulm Germany. He lived there with his parents, Herman and Pauline. After a year in Ulm, due to the failure of his father's electrical and engineering workshop, the Einstein family moved to Munich (the capital of Bavaria), where after a year in residence there, Einstein's mother had Maja, Einstein's sister. Despite the fact that he was Jewish, from age five until age ten, Einstein attended a Catholic School near his home. But, at age 10, Einstein was transferred to the "Luitpold Gymnasium," where Latin, Greek, History, and Geography were pounded into childrens' heads. His parents wanted him to finish school, get his diploma so he could go to a University, and then become an electrical engineer. But Einstein had other Ideas for his future. Einstein's father wanted him to attend a university but he could not because he did not have a diploma from the Gymnasium. But there was a solution to this problem over the Alps, in Zurich, there was The Swiss F ederal Institute of Technology which did not require a diploma to attend. The one thing it did require was the applicant to pass an entrance exam. But then yet another problem arose, most scholars were 18 when they entered the institute, and Einstein was only 16. Einstein took the risk, and in the autumn he was dispatched over the Alps. Einstein took the exam, but did not pass. The principal of the school was impressed with his abilities, so he was admitted to the cantontal scho...

Human hand catching an object Essay

ANALYSING From this experiment I have found out that there are different factors that affect the resistance of a wire. The factors that I have investigated are the length and thickness of a wire. In the experiment, as the wire got shorter, the resistance decreased, and if the wire were increased then the resistance would increase too. If the thickness of a wire were to be changed then the thicker the wire, the less resistance and the thinner the wire the more resistance it will have. I have also found out that the resistance is calculated by dividing the voltage by the current. This calculation was used in my experiment and showed that the resistance is roughly constant. If some odd results were obtained, it was because at a low voltage the power packs are inaccurate and at a high current, we might gain a heating effect. Ohm’s law can be proved by the graph due to the fact that the graph has a straight line; therefore it has a constant gradient, meaning a constant resistance whatever current is passing through it, providing the temperature is constant. If the graph were a curved, then that would mean that the resistance was changing. If that were the case the resistance could be found for any point by taking the pair of values (V, I) from the graph and sticking them in the formula R= V/I. (Information obtained from physics revision guide. ) That would be disobeying Ohm’s law. In my opinion, the resistance of the 32- copper wire seemed odd since the thinnest wire is supposed to have the highest resistance. However a good conductor, which is what copper is, will allow current to flow through it easily. Therefore that’s why the ammeter reading for the copper wire, which measures the current, was very high, compared to the reading of the other types of wire. A nichrome wire would have more resistance than a copper wire of the same size, because less current flows through it, making it not such a good conductor. We can also conclude that the thickest wire, type 26, had the highest resistance because less current could flow through it. EVALUATING: This investigation was conducted following the method above. By following those steps, I managed to obtain more than enough readings to plot a graph with and I managed to obtain accurate results, until the wire reached 30cm (TABLE 1). However my previous readings were fairly accurate, which were more enough for me to plot a graph with. I had seven readings when only 6 are needed to plot a graph. The results of the first experiment my group conducted, (TABLE 2) were much more accurate than the second one (TABLE 1). The resistance was very constant, however we did not complete the experiment. We planned to carry it on the next lesson, but it would not have been a fair test because we used a different power pack and the voltage was not the same. We found out that we were getting odd results to our previous ones; therefore we had to start the whole thing again. We made sure we finished that experiment and even had time to conduct another: an investigation to find out whether the thickness of a wire would affect the resistance. Since I only had to investigate five different wires, obtaining five results, this investigation was easier to conduct because there were fewer to do and I knew exactly what I was doing. It took me less time to set up the circuit and it was definitely a fair test. However when it came to the 32-copper wire the resistance was very high. I expected it to be high because it was one of the thinnest wires, however not that high. I suspect I either recorded the wrong reading or because at low voltage the power pack was inaccurate and at high current there was a heating effect. However, as I mentioned in the analysing section, there was a simpler explanation. From previous work, I remembered copper is a very good conductor, therefore the high current reading. In future if I conduct another similar experiment to this one there are some improvements that could be made: I could compare my results with other people to see if they got the same or near enough results. That way I would know whether I was on the right tracks. If I am stuck on connecting the circuit, I could draw a diagram first and follow that. I should finish every experiment the same day; so that I get more accurate results and can compare the results to the results of another experiment, on the same subject and would not have waste time having to start the same experiment again. I could have done some further research and find out what and if there are any other factors that affect the resistance of a wire and then I could have conducted an experiment.

Events Leading to the 1959 Tibetan Uprising

Chinese artillery shells pummeled the Norbulingka, the Dalai Lamas summer palace, sending plumes of smoke, fire, and dust into the night sky. The centuries-old building crumbled under the barrage, while the badly outnumbered Tibetan Army fought desperately to repel the Peoples Liberation Army (PLA) from Lhasa. Meanwhile, amidst the snows of the high Himalaya, the teenaged Dalai Lama and his bodyguards endured a cold and treacherous two-week-long journey into India. Origins of the Tibetan Uprising of 1959 Tibet had an ill-defined relationship with Chinas Qing Dynasty (1644-1912); at various times it could have been seen as an ally, an opponent, a tributary state, or a region within Chinese control. In 1724, during a Mongol invasion of Tibet, the Qing seized the opportunity to incorporate the Tibetan regions of Amdo and Kham into China proper. The central area was renamed Qinghai, while pieces of both regions were broken off and added to other western Chinese provinces. This land grab would fuel Tibetan resentment and unrest into the twentieth century. When the last Qing Emperor fell in 1912, Tibet asserted its independence from China. The 13th Dalai Lama returned from three years of exile in Darjeeling, India, and resumed control of Tibet from his capital at Lhasa. He ruled until his death in 1933. China, meanwhile, was under siege from a Japanese invasion of Manchuria, as well as a general breakdown of order across the country. Between 1916 and 1938, China descended into the Warlord Era, as different military leaders fought for control of the headless state. In fact, the once-great empire would not pull itself back together until after World War II, when Mao Zedong and the Communists triumphed over the Nationalists in 1949. Meanwhile, a new incarnation of the Dalai Lama was discovered in Amdo, part of Chinese Inner Tibet. Tenzin Gyatso, the current incarnation, was brought to Lhasa as a two-year-old in 1937  and was enthroned as the leader of Tibet in 1950, at 15. China Moves In and Tensions Rise In 1951, Maos gaze turned west. He decided to liberate Tibet from the Dalai Lamas rule and bring it into the Peoples Republic of China. The PLA crushed Tibets tiny armed forces in a matter of weeks; Beijing then imposed the Seventeen Point Agreement, which Tibetan officials were forced to sign (but later renounced). According to the Seventeen Point Agreement, the privately-held land would be socialized and then redistributed, and farmers would work communally. This system would first be imposed on Kham and Amdo (along with other areas of the Sichuan and Qinghai Provinces), before being instituted in Tibet proper. All the barley and other crops produced on the communal land went to the Chinese government, according to Communist principles, and then some were redistributed to the farmers. So much of the grain was appropriated for use by the PLA that the Tibetans did not have enough to eat. By June of 1956, the ethnic Tibetan people of Amdo and Kham were up in arms. As more and more farmers were stripped of their land, tens of thousands organized themselves into armed resistance groups  and began to fight back. Chinese army reprisals grew increasingly brutal and included wide-spread abuse of Tibetan Buddhist monks and nuns. China alleged that many of the monastic Tibetans acted as messengers for the guerrilla fighters. The Dalai Lama visited India in 1956  Ã¢â‚¬â€¹and admitted to Indian Prime Minister Jawaharlal Nehru that he was considering asking for asylum. Nehru advised him to return home, and the Chinese Government promised that communist reforms in Tibet would be postponed and that the number of Chinese officials in Lhasa would be reduced by half. Beijing did not follow through on these pledges. By 1958, as many as 80,000 people had joined the Tibetan resistance fighters. Alarmed, the Dalai Lamas government sent a delegation to Inner Tibet to try and negotiate an end to the fighting. Ironically, the guerrillas convinced the delegates of the righteousness of the fight, and Lhasas representatives soon joined in the resistance! Meanwhile, a flood of refugees and freedom fighters moved into Lhasa, bringing their anger against China with them. Beijings representatives in Lhasa kept careful tabs on the growing unrest within Tibets capital city. March  1959 - The Uprising Erupts in Tibet Proper Important religious leaders had disappeared suddenly in Amdo and Kham, so the people of Lhasa were quite concerned about the safety of the Dalai Lama. The peoples suspicions, therefore, were raised immediately when the Chinese Army in Lhasa invited His Holiness to watch a drama at the military barracks on March 10, 1959. Those suspicions were reinforced by a none-too-subtle order, issued to the head of the Dalai Lamas security detail on March 9, that the Dalai Lama should not bring along his bodyguards. On the appointed day, March 10, some 300,000 protesting Tibetans poured into the streets and formed a massive human cordon around  Norbulingkha, the Dalai Lamas Summer Palace, to protect him from the planned Chinese abduction. The protestors stayed for several days, and calls for the Chinese to pull out of Tibet altogether grew louder each day. By March 12, the crowd had begun to barricade the streets of the capital, while both armies moved into strategic positions around the city and began to reinforce them. Ever the moderate, the  Dalai Lama  pleaded with his people to go  home  and sent placatory letters to the Chinese PLA commander in Lhasa. When the PLA moved artillery into  the range  of the Norbulingka, the Dalai Lama agreed to evacuate the building. Tibetan troops prepared a secure escape route out of the besieged capital on March 15. When two artillery shells struck the palace two days later, the young Dalai Lama and his ministers began the arduous 14-day trek over the Himalayas  for  India. On March 19, 1959, fighting broke out in earnest in Lhasa. The Tibetan army fought bravely, but they were vastly outnumbered by the PLA. In addition, the Tibetans had antiquated weapons. The firefight lasted just two days. The Summer Palace, Norbulingka, sustained over 800 artillery shell strikes that killed an unknown number of people inside; the major monasteries were bombed, looted and burned. Priceless Tibetan Buddhist texts and works of art were piled in the streets and burned. All remaining members of the Dalai Lamas bodyguard corps were lined up and publicly executed, as were any Tibetans discovered with weapons. In all, some 87,000 Tibetans were killed, while another 80,000 arrived in neighboring countries as refugees. An unknown number tried to  flee  but did not make it. In fact, by the time of the next regional census, a total of about 300,000 Tibetans were missing - killed, secretly jailed, or gone into exile. Aftermath of the 1959 Tibetan Uprising Since the 1959 Uprising, the central government of China has been steadily tightening its grip on the Tibet. Although Beijing has invested in infrastructure improvements for the region, particularly in Lhasa itself, it has also encouraged thousands of ethnic Han Chinese to move to Tibet. In fact, Tibetans have been swamped in their own capital; they now constitute a minority of the population of Lhasa. Today, the Dalai Lama continues to head the Tibetan government-in-exile from Dharamshala, India. He advocates increased autonomy for Tibet, rather than full independence, but the Chinese government generally refuses to negotiate with him. Periodic unrest still sweeps through Tibet, especially around important dates such as March 10 to 19 - the anniversary of the 1959 Tibetan Uprising.