【導(dǎo)讀】溝通渠道，便于用戶(hù)之間的溝通交流和資源共享。網(wǎng)絡(luò)可以根據(jù)其多種特點(diǎn)來(lái)分。計(jì)算機(jī)網(wǎng)絡(luò)允許資源和信息在互聯(lián)設(shè)備中共享。地面防空系統(tǒng)及其相關(guān)的商業(yè)航空訂票系統(tǒng)、半自動(dòng)商業(yè)研究環(huán)境。1957年俄羅斯向太空發(fā)射人造衛(wèi)星。十八個(gè)月后，美國(guó)開(kāi)始設(shè)立高級(jí)研究。計(jì)劃局并第一次發(fā)射人造衛(wèi)星。這一切的負(fù)責(zé)者是美國(guó)博士萊德里爾克。阿帕網(wǎng)于來(lái)于自印度，1969. 年印度將其名字改為因特網(wǎng)。國(guó)國(guó)防部資助并設(shè)計(jì)高級(jí)研究計(jì)劃局網(wǎng)(阿帕網(wǎng))。20世紀(jì)60年代起開(kāi)始在此基礎(chǔ)上設(shè)計(jì)開(kāi)發(fā)，由此，阿帕網(wǎng)演變成現(xiàn)代互聯(lián)網(wǎng)。電話(huà)、視頻電話(huà)和視頻會(huì)議來(lái)進(jìn)行溝通和交流。雙絞線是目前應(yīng)用最廣泛的通訊媒介。絕緣層幫助減少干擾和變形。些國(guó)家，則根據(jù)其規(guī)模、范圍和目的分類(lèi)。信任水平和進(jìn)入權(quán)利之間同這些類(lèi)型的網(wǎng)絡(luò)大有不同。局域網(wǎng)往往是專(zhuān)為內(nèi)部使。算機(jī)實(shí)驗(yàn)室、辦公樓、或接近的建筑物。通訊路由器，它是學(xué)生連接到互聯(lián)網(wǎng)和學(xué)院網(wǎng)絡(luò)的接入路由器。

　　

【正文】 used to separate the traffic of different user munities over an underlying work with strong security features. VPN may have besteffort performance, or may have a defined service level agreement (SLA) between the VPN customer and the VPN service provider. Generally, a VPN has a topology more plex than pointtopoint. Interwork An interwork is the connection of two or more private puter works via a mon routing technology (OSI Layer 3) using routers. The Inter is an aggregation of many interworks, hence its name was shortened to Inter. Backbone work A Backbone work (BBN) A backbone work or work backbone is part of a puter work infrastructure that interconnects various pieces of work, providing a path for the exchange of information between different LANs or subworks.[1][2] A backbone can tie together diverse works in the same building, in different buildings in a campus environment, or over wide areas. Normally, the backbone39。s capacity is greater than the works connected to it. A large corporation that has many locations may have a backbone work that ties all of the locations together, for example, if a server cluster needs to be accessed by different departments of a pany that are located at different geographical locations. The pieces of the work connections (for example: ether, wireless) that bring these departments together is often mentioned as work backbone. Network congestion is often taken into consideration while designing backbones. Backbone works should not be confused with the Inter backbone. 中英文資料 Global area work A global area work (GAN) is a work used for supporting mobile munications across an arbitrary number of wireless LANs, satellite coverage areas, etc. The key challenge in mobile munications is handing off the user munications from one local coverage area to the next. In IEEE Project 802, this involves a succession of terrestrial wireless LANs.[7] Inter The Inter is a global system of interconnected governmental, academic, corporate, public, and private puter works. It is based on the working technologies of the Inter Protocol Suite. It is the successor of the Advanced Research Projects Agency Network (ARPANET) developed by DARPA of the United States Department of Defense. The Inter is also the munications backbone underlying the World Wide Web (WWW). Intras and extras Intras and extras are parts or extensions of a puter work, usually a local area work. An intra is a set of works, using the Inter Protocol and IPbased tools such as web browsers and file transfer applications, that is under the control of a single administrative entity. That administrative entity closes the intra to all but specific, authorized users. Most monly, an intra is the internal work of an anization. A large intra will typically have at least one web server to provide users with anizational information. An extra is a work that is limited in scope to a single anization or entity and also has limited connections to the works of one or more other usually, but not necessarily, trusted anizations or entities—a pany39。s customers may be given access to some part of its intra—while at the same time the customers may not be considered trusted from a security standpoint. Technically, an extra may also be categorized as a CAN, MAN, WAN, or other type of work, although an extra cannot consist of a single LAN。 it must have at least one connection with an external work. 中英文資料 Overlay work An overlay work is a virtual puter work that is built on top of another work. Nodes in the overlay are connected by virtual or logical links, each of which corresponds to a path, perhaps through many physical links, in the underlying work. A sample overlay work: IP over SONET over Optical 中英文資料 References A. Banks (2020). On the way to the web: the secret history of the inter and its founders. Apress. p. 1. ISBN 9781430208693. 2. Christos J. P. Moschovitis (1998). History of the Inter: a chronology, 1843 to the present. ABCCLIO. p. 36. ISBN 9781576071182. AAAMAAJamp。dq=intitle%3A%22history+of+the+inter%22+sage+sabreamp。q=sage+sabre%27ssearch_anchor. 3. Chris Sutton. Inter Began 35 Years Ago at UCLA with First Message Ever Sent Between Two Computers. UCLA. Archived from the original on 20200308. 04/. 4. New global standard for fully worked home, ITUT Press Release 5. IEEE 40Gb/s and 100Gb/s Ether Task Force 6. personal area work (PAN). Retrieved 20200129. 7. Mobile Broadband Wireless connections (MBWA) 8. D. Andersen, H. Balakrishnan, M. Kaashoek, and R. Morris. Resilient Overlay Networks. In Proc. ACM SOSP, Oct. 2020. 9. Define switch.. . Retrieved 20200408. 10. Basic Components of a Local Area Network (LAN). . Retrieved 20200408.