⑴ 跪求一遍关于计算机网络的英语作文..字数在1200以上的..
Computer networks
Now every almost have computers, and computer good does have its downside - it depends on how you use. If you want to ask me: I on the computer do what, I can tell you, I will do a lot of things in the computer. May first and have out-of-town relatives chat, then can check information, listening to music, watching movies, paint... My favorite on the computer music and watching movies, because it very relaxing my mood.But the most people used compter to surf the internet.Now Let us know about the computer network
Ⅰ.Introction
Computer networks,the wide spread sharing of information among groups of computers and their users,are a central part of the information age.The popular adoption of the personal computer(PC)
and the local area network (LAN) ring the 1980s has led to the capacity to access information on a distant database;download an application from overseas;send a message to a friend country;and share files with a colleague-all from a personal computer.
The network that allow all this to be done so easily are sophisticated and complex entities.They rely for their effectiveness on many cooperating computers.The design and deployment of the wordwide computer network can be viewed as one of the great technological wonders of recent decades. Nowadays Intemet is very popular all over the world, especially in some big cities. Do you know when the Intemet was first established? Built in 1960s, the Internet was a crude network of a few computers which shared information. If one of the computers broke down, the whole networks would be unable to work, causing continual problems. At first, just the government had access to the Internet, using it for communications among different branches. However, by 1970s the Internet had been used in universities, banks, and hospitals. At the beginning of 1990s computers became affordable for common people and this affordability increased the use of the Internet by people,It is said that each day tens of millions of people log off, making it the most important part of people's life.
Ⅱ.Local Area Network
One of the most dramatic events in computer networking has been the introction and rapid growth of local area network(LAN) as a way to standardize the system of linking computers used in office systems.As the name suggests,this is a means of connecting a number of computing elements together.At the simplest level,a LAN provides no more more than a shared medium (such as a coaxial cable to which all computers and printers are connected) along with a set of rules that govern the access to that medium.The most widely used LAN,Ethernet,used a mechanism called Carrier Sense Multiple Access-Collosion Detect(CSMA-CD).This means that each connected device can only use the cable when it has established that each connected device is using it.If there is contention, the device looking for a connection backs off and tries again later.The Ethernet transfers data at 10M bits/sec,which is fast enough to make the distance between devices insignificant.They appeat to be connected directly to their destination.
There are many different layouts(such as bus ,star,ring,see Figure 6A-2)and a number of different access protocols for LANs.Despire this variety,all LANs share the feature that they are limited in range (typically they cover one building) and are fast enough to make the connecting network invisible to the devices that use it.
In addition to providing shared access,modern LANs can also give users a wide range of sophisticated facilities.Managenment software packages are available to control the way in which devices are configured on the local area network (LAN),how users are administered,and how network resources are controlled.A widely adopted structure o local network is to have a number of servers that are available to a (usuallu much greater) nember of clients.The former,usually powerful computers,provide service such as print control,file sharing,and mail to the latter,which are usually personal computers.
Ⅲ.Routers and brideges
The facilities on most local area network (LAN) are very powerful.Most organizatonns do not wish to have small isolated islands of computing facilities.They usually want to extend facilities over a wider area so that groups can wok wtthout having to be located.Routers and bridges arespecialized devices that allow two or more local area network (LAN) to be connected.The bridges is the more basic device and can only connect local area network (LAN) of the same type.The router is a more intelligent component that can interconnent many different types of computer network.
Many large companies have corporate adta network that are founded on a collection of local area network (LAN) and routers.From the user’s point of view,this arrangement provides them with a physically diverse network that looks like one coherent resource.
Ⅳ.Wide Area Networks
At some point,it becomes impractical to extend a local area network (LAN) any further.Physical limitation sometimes drives this,but more often than not there are more concenient or cheaper ways to extend a computer network.Two major components in most real computer networks are the public telephone and data networks.These provide long-distance links that extend a local area network (LAN) into a wide area network (WAN).Nearly all of the national network operators offer services for the interconnection of computer networks.These services range from simple, low speed data links that work over the public telephone network to sophisticaied high speed data services that are ideally suited to the interconnection of LANs.These high speed data services are usually referred to as broadband connection.It is anticiopated that they will provide the necessary links between LANs that make what is called the information superhighway a reality.
⑵ 互联网的利与弊，英语作文100字，带中文翻译。谢谢
Internet is an international computer network connecting other networks and computers from companies, universities, etc. At present, most of people can use computer for working, chatting, playing game, watching the movie and picture, and searching anything by clicking on Internet. Internet is useful assistant for leading you to another world which amazing thing. I think Internet has advantage and disadvantage. Advantage of Internet is that you can do anything that you want on Internet when it was connected to independent world such as download data, programs, game, picture etc. But Internet has risk to receive spy ware, it attempts to disable or delete anti-spy ware tool and suppress warning massages given to users, it damages your data or system in your computer. Moreover, you have risk to find the bad persons when chat in chat room especially women. You can found the crime news on the newspapers. The news said they have many victim from chatting with unknown people by the victim were believed implicitly. In conclusion, many people still use Internet because it is useful and comfortable. 互联网是一个国际计算机网络连接其他网络和计算机公司，大学等。目前，大多数的人会使用电脑工作，聊天，玩游戏，看电影和图片，并点击搜索任何互联网。互联网是一种有用的辅助引导你到另一个世界的神奇的东西。我认为因特网有优点和缺点。利用互联网，你可以做任何你想在互联网上时，连接到独立的世界，如下载数据，程序，游戏，图片等，但互联网风险接受间谍软件，它试图禁用或删除反间谍软件工具和制止警告给用户，它损害您的数据或系统在您的计算机。此外，你有可能找到坏人聊天，在聊天室特别是妇女会受欺骗。你可以发现犯罪新闻的报纸。新闻说他们有许多受害者和不明身份的人聊天。总之，许多人仍然使用互联网，因为它是有用的和舒适的。
⑶ 关于网络的高中英语作文带翻译
下面我为大家带来关于网络的 高中 英语 作文 带翻译，欢迎大家学习!
关于网络的高中英语作文带翻译1：
In my opinion，the Internet is helpful rather than harmful as someone else thinks. As is known to all，the Internet is playing a more and more important part in our daily life. On the Internet，we can read news at home and from abroad and get as much information as we can. We can send e - mails or make phone calls to our family as well as to our friends. We can also attend the net school，read many books and even teach ourselves English. We can also enjoy music，watch matches and play computer games on the Internet. We can even do shopping on line. Besides，we can improve our ability to operate the computer.
But we should not be given to the Internet，or we'll get our life and study destroyed. Besides，we should keep off the harmful websites. Anyhow，this doesn't prevent the Internet becoming our friend. We can't throw away the apple because of the core，can we?
在我看来,互联网是有用的,而不是像别人认为有害。众所周知,互联网正在发挥着越来越重要的部分在我们的日常生活中。在互联网上,我们可以阅读新闻在国内和国外,获得尽可能多的信息。我们可以发送电子邮件或打电话给我们的家人以及我们的朋友。我们还可以上网络学校,阅读了很多的书籍,甚至教我们英语。我们还可以欣赏音乐,观看比赛,玩电脑游戏在互联网上。我们甚至可以在网上购物。此外,我们可以提高我们操作电脑的能力。
但我们不应给互联网,或者我们会毁了我们的生活和学习。除此之外,我们应该远离有害的网站。不管怎样,这并不妨碍互联网成为我们的朋友。我们不能扔苹果的核心,我们可以吗?
关于网络的高中英语作 文 带翻译 2：
Now many of my classmates like to surf the Internet in their free time.I think Internet can bring us both advantages and disadvantages.
For example，I can surf the internet to learn more information about the world. And I can make more friends on it. I can also talk with my teacher or my classmates some problem after class。
However, Internet can make some problems at the same time. If you spend too much time on it ,you will be come lazy and can't put your heart on study. It will be even worse if you feel you can't live without Internet.
So we must be careful when we use the Internet.
现在我的很多同学喜欢在闲暇时间上网。我认为互联网能给我们带来两个优点和缺点。
例如,我可以上网了解更多关于世界的信息。我可以认识更多的朋友。我也可以跟老师或同学下课后一些问题。
然而,互联网可以使一些问题在同一时间。如果你花太多时间在这上面,你会懒惰,不能把心用在学习上。这将是更糟糕的是,如果你觉得你的生活不能没有互联网。
所以我们必须小心当我们使用互联网。
关于网络的高中英语作文 带翻译 3：
With the development of the science and technology,the computer has been becoing the necessity for people in the 21st Century.Following,network is of close link with our life,bringing us incomparable convenience on our life and work.
Through the network,we can search for useful datas and get to know the current events.When you play computer games after a long-time work,it can relieve your pressure and make you feel relaxed.Besides,playing online games is not all bad,for it can fulfil students' entertaining requests as well as practise their response ability.
However,there still exists some disadvantages in the network.The radiation from the computer will do harm to people's health if you keep on watching the computer for a long time.And short sight may caused by it for your eyes stay tense.At present,there are too many games on the Internet,but some of them are not of good quality even contain some unhealthy content like violence and so on.Duo to the lack of recognizing society and self-protection awareness,some students get addicted in the games and online dating.
In fact,network is not that horrible,as long as we know more about it,it will become our right hand on our studies.Let's build a clean network world together.
随着科学技术的发展,计算机已经做好在21世纪人的必要性。后,网络与我们的生活紧密联系,将我们无与伦比的方便我们的生活和工作。
通过网络,我们可以寻找有用的资料和了解时事。当你玩电脑游戏长期工作后,它可以缓解你的压力,让你感到放松。此外,玩网络游戏并不全是坏事,因为它可以满足学生娱乐的请求以及练习他们的反应能力。
然而,网络中仍然存在一些不足之处。电脑的辐射会危害人们的健康,如果你继续看电脑很长一段时间。和近视可能由于它对你的眼睛保持紧张。目前,在互联网上有太多的游戏,但他们中的一些人不是质量好甚至包含一些暴力等不健康内容。两人认识社会和自我保护意识的缺乏,一些学生上瘾的游戏和网上交友。
事实上,网络并不可怕,只要我们知道更多关于它,它在我们的研究将成为我们的右手。让我们一起建立一个干净的网络世界。
以上就是我为大家带来的关于网络的高中英语作文带翻译，希望对大家的 英语学习 有所帮助!
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⑷ 网络的利与弊英文带翻译500字
Pros and Cons of Networking
网络的优缺点
There is a wide variety of networks and their advantages and disadvantages mainly depend on the type of network.
Advantages of Computer Networking
1. Easy Communication and Speed
It is very easy to communicate through a network. People can communicate efficiently using a network with a group of people. They can enjoy the benefit of emails, instant messaging, telephony, video conferencing, chat rooms, etc.
2. Ability to Share Files, Data and Information
This is one of the major advantages of networking computers. People can find and share information and data because of networking. This is beneficial for large organizations to maintain their data in an organized manner and facilitate access for desired people.
3. Sharing Hardware
Another important advantage of networking is the ability to share hardware. For an example, a printer can be shared among the users in a network so that there’s no need to have indivial printers for each and every computer in the company. This will significantly rece the cost of purchasing hardware.
4. Sharing Software
Users can share software within the network easily. Networkable versions of software are available at considerable savings compared to indivially licensed version of the same software. Therefore large companies can rece the cost of buying software by networking their computers.
5. Security
Sensitive files and programs on a network can be password protected. Then those files can only be accessed by the authorized users. This is another important advantage of networking when there are concerns about security issues. Also each and every user has their own set of privileges to prevent them accessing restricted files and programs.
6. Speed
Sharing and transferring files within networks is very rapid, depending on the type of network. This will save time while maintaining the integrity of files.
Disadvantages of Networking
1. Breakdowns and Possible Loss of Resources
One major disadvantage of networking is the breakdown of the whole network e to an issue of the server. Such breakdowns are frequent in networks causing losses of thousands of dollars each year. Therefore once established it is vital to maintain it properly to prevent such disastrous breakdowns. The worst scenario is such breakdowns may lead to loss of important data of the server.
2. Expensive to Build
Building a network is a serious business in many occasions, especially for large scale organizations. Cables and other hardware are very pricey to buy and replace.
3. Security Threats
Security threats are always problems with large networks. There are hackers who are trying to steal valuable data of large companies for their own benefit. So it is necessary to take utmost care to facilitate the required security measures.
4. Bandwidth Issues
In a network there are users who consume a lot more bandwidth than others. Because of this some other people may experience difficulties.
Although there are disadvantages to networking, it is a vital need in today’s environment. People need to access the Internet, communicate and share information and they can’t live without that. Therefore engineers need to find alternatives and improved technologies to overcome issues associated with networking. Therefore we can say that computer networking is always beneficial to have even if there are some drawbacks.
网络的种类繁多，其优势和劣势主要取决于网络的类型。
网络的优势如下：
1 .网络使人容易沟通和快速
通过网络进行交流很容易。人们可以通过与一群人的网络进行有效的交流。他们可以享受电子邮件、即时通讯、电话、视频会议、聊天室等的好处。
3 .可共享硬件
联网的另一个重要优势是共享硬件的能力。例如，一个打印机可以在一个网络中的用户之间共享，这样就不必为公司中的每一台计算机都有单独的打印机。这将大大降低采购硬件的成本。
4。共享软件
用户可以轻松地在网络中共享软件。与同一软件的单独授权版本相比，软件的可联网版本在相当大的节省下可用。因此，大公司可以通过联网电脑来降低购买软件的成本。
5。安全
网络上敏感的文件和程序可以被密码保护。然后，这些文件只能被授权用户访问。当人们对安全问题感到担忧时，这是网络的另一个重要优势。此外，每个用户都有自己的权限集，以防止他们访问受限制的文件和程序。
6。速度
网络中共享和传输文件的速度非常快，这取决于网络的类型。这将节省时间，同时保持文件的完整性。
网络的缺点
1 .工作故障和可能的资源损失
由于服务器的问题，网络的一个主要缺点是整个网络的崩溃。这种故障在网络中经常造成每年数千美元的损失。因此，一旦建立起来，就必须正确地维护它，以防止这种灾难性的崩溃。最糟糕的情况是这样的故障会导致服务器的重要数据丢失。
2。昂贵的建造
在很多情况下，建立一个网络是一项严肃的业务，特别是对于大型组织来说。电缆和其他硬件的购买和更换非常昂贵。
3 .项目安全威胁
安全威胁一直是大型网络的问题。有黑客试图窃取大公司的有价值的数据，以获取他们自己的利益。因此，有必要采取最大的措施，以方便采取必要的安全措施。
4。带宽问题
在网络中，用户比其他人消耗更多的带宽。因为其他一些人可能会遇到困难。
虽然网络也有缺点，但在当今的环境中，这是一个至关重要的需求。人们需要访问互联网，交流和共享信息，没有这些信息他们就无法生活。因此，工程师需要找到替代和改进的技术来克服与网络相关的问题。因此，我们可以说，即使有一些缺点，计算机网络也总是有益的。