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说到IP地址,相信接触过一点点网络的人都应该有所耳闻。不就是在“网卡→属性→Internet协议”中输入的那个4位的IP地址吗?没错,这就是IP地址,有些人称它为网络身份证。实际上,网络身份证这个比喻并不恰当,因为身份证都是惟一的,而IP地址则只有公网IP才是惟一,内部网的IP地址(如192.168.0.1)在全世界不知道有多少个重复的呢!善于思考的你一定发现了一点问题:IP地址有可能重复,那计算机为什么还能通过它来辨识远在天边的另一台电脑呢?难道除了IP地址之外,网卡里面还隐藏着真正的“身份证”吗?对!它就是MAC地址,它才是网卡真正的身份证。
Speaking of IP addresses, I believe people who have seen a little bit of internet should have heard about it. Is not that in the “NIC → Properties → Internet Protocol,” the 4-bit IP address? Yes, this is the IP address, some people call it a network ID. In fact, the network ID card analogy is not appropriate, because the ID card is unique, and the IP address is the only public IP is the only IP address of the intranet (such as 192.168.0.1) in the world do not know how many A repeat of it! Be good at thinking you must find a little problem: IP address may be repeated, then why can the computer through it to identify another computer far away? Is it in addition to the IP address, the card which also Hiding the real “ID card” right! It is the MAC address, it is the real card ID card.