There are many online articles about the ARP, most of all about ARP spoofing, ARP of the alternative presented here uses: detecting the target host is active. Whether the survival of the traditional detection method of the remote host through ICMP protocol echo reply packets to detect. With more and more aware of security and attention, many of the host in order to avoid detection by the scanner, ICMP packets through the firewall to shield hidden in the network so as to achieve the purpose. Here we introduce the use of ARP protocol detect active hosts in the network idea, the shortcomings of this method can only detect the Ethernet host. ARP protocol is probably the first to know. ARP protocol is "Address Resolution Protocol" acronym, it is the role of IP address into a physical address, the detailed process information "TCP / IP Detailed Volume." ARP protocol packet format is as follows:
5 years ago, Microsoft established the Patent Office earlier this month, Microsoft acquired the patent project has reached 10,000 mark. Microsoft has this big company ranks among the patents, but about the number of patents, non-IBM is none other than last year, Big Blue became the first in the year 4000 obtained the patent business. Microsoft is currently the top five U.S. patents to companies in the past two years, growing its overall patent power. Microsofts chief patent attorney Bart Eppenauer said: "Getting 10,000 patents prove that Microsofts innovation is truly effective." Although the number up, and Microsoft failed to get rid of the entanglement of patent litigation cases. Over the past few years, the cases in this area increased significantly. This 10 000 Microsoft patents, the vast majority of computer technology, such as Surface and so on. Every time Microsoft employees who apply for a patent to provide $ 1,500, and provide the innovation and incubation of the pipeline. Once the patent, Microsoft employees will receive a patent application with the board.