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[插图太大请下载后观看] Because IPv4 uses only 32 bits for its IP addresses (called its address space), the number of total unique IP addresses is limited. IPv4 addresses are four numbers, separated by dots. ... 阅读全文
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[插图太大请下载后观看] The Internet is a packet-switched network, which means that when you send information across the Internet from your computer to another computer, the data is broken into small packets.... 阅读全文
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[插图太大请下载后看] Whether at work or at home, you get onto the Internet via a variety of ways. You may connect to a LAN at your place of business via Ethernet networks and token-ring networks. Token-ring... 阅读全文
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[插图太大请下载后观看] You might take for granted that when you send a piece of information across the Internet, it will always reach its intended destination. However, the process of sending that informat... 阅读全文
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[插图太大请下载后观看] One of the most frequently asked questions about the Internet is "Who runs it?" The truth is that no centralized management of the Internet exists. Instead, it is a collection of thou... 阅读全文