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当今社会，网络已经成为了人们生活中不可或缺的一部分。随着网络的普及，网络安全问题也越来越受到人们的关注。网络安全是指保护网络系统和网络使用者免于遭受未经授权的访问、破坏、窃取、篡改、伪造、滥用和泄露等威胁的能力。网络安全问题的出现，不仅会对个人的隐私造成侵害，还会对国家的安全和社会的稳定造成威胁。因此，保障网络安全，已经成为了当今社会的重要任务之一。

首先，我们需要了解网络安全的基本知识。网络安全包括网络系统安全和网络信息安全两个方面。网络系统安全是指保护网络系统免受未经授权的访问、破坏、窃取、篡改、伪造、滥用和泄露等威胁的能力。网络信息安全是指保护网络信息免受未经授权的访问、破坏、窃取、篡改、伪造、滥用和泄露等威胁的能力。网络安全的基本原则是保密性、完整性和可用性。保密性是指保护信息不被未经授权的人员访问。完整性是指保护信息不被未经授权的人员篡改。可用性是指保证信息在需要时能够得到及时的访问。

其次，我们需要了解网络安全的威胁。网络安全威胁主要包括黑客攻击、病毒、木马、钓鱼、网络诈骗等。黑客攻击是指未经授权的人员通过网络入侵他人计算机系统，获取他人计算机系统的信息或者破坏他人计算机系统的行为。病毒是指一种可以自我复制的程序，它会破坏计算机系统的正常运行。木马是指一种隐藏在正常程序中的恶意程序，它可以在用户不知情的情况下获取用户的计算机系统信息。钓鱼是指通过伪造合法的网站或者电子邮件，诱骗用户输入个人信息，从而达到非法获取用户信息的目的。网络诈骗是指通过网络手段进行的欺诈行为，如虚假广告、虚假销售等。

最后，我们需要了解如何保障网络安全。保障网络安全需要从多个方面入手。首先，我们需要加强网络安全意识教育，提高网络安全意识。其次，我们需要加强网络安全技术研究，提高网络安全技术水平。再次，我们需要加强网络安全法律法规建设，完善网络安全法律法规体系。最后，我们需要加强网络安全管理，建立健全网络安全管理体系。

https://en.wikipedia.org/wiki/Cat

starts your friday with something beautiful, like looking at beautiful beings ???

multiple upload drag and drop

The history of China spans several millennia across a wide geographical area, and can be under many diverse historiographical lenses. Each region now considered part of the Chinese world has experienced periods of unity, fracture, prosperity, and hardship. Classical Chinese civilization first emerged in the Yellow River valley, which along with the Yangtze and Pearl valleys now constitute the geographic core of China and have for the majority of its imperial history. China maintains a rich diversity of ethnic and linguistic people groups. The traditional lens for viewing Chinese history is the dynastic cycle: imperial dynasties rise and fall, and are ascribed certain achievements. Throughout pervades the narrative that Chinese civilization can be traced as an unbroken thread many thousands of years into the past, making it one of the cradles of civilization. At various times, states representative of a dominant Chinese culture have directly controlled areas stretching as far west as the Tian Shan, the Tarim Basin, and the Himalayas, as far north as the Sayan Mountains, and as far south as the delta of the Red River.

The Neolithic period saw increasingly non-parochial societies begin to emerge along the Yellow and Yangtze rivers. For example, the Erlitou culture existed throughout the central plains of China during the era traditionally attributed to the Xia dynasty (c.  2070–1600 BCE) by Chinese historiographers in foundational works like the Records of the Grand Historian—a text written around 1700 years after the date assigned to the fall of the Xia. The earliest surviving written Chinese dates to roughly 1250 BCE, consisting of divinations inscribed on oracle bones. Chinese bronze inscriptions, ritual texts dedicated to deceased ancestors, form another large corpus of early Chinese writing. The earliest strata of received literature in Chinese include poetry, divination, and records of official speeches. China is believed to be one of a very few loci of independent invention of writing, and the earliest surviving records display an already-mature written language. The culture remembered by the earliest extant literature is that of the decentralized Zhou dynasty (c. 1046–256 BCE), during which bureaucratization increased, chariot-based warfare was superseded by infantry, the earliest classical texts took shape, the Mandate of Heaven was introduced, and philosophies such as Confucianism, Taoism, and Legalism were first articulated.

A very large size video

Test 96.53mb video

Huat arh!!~~