1 ARP Protocol OverviewIP packets are usually sent over Ethernet, but Ethernet devices do not recognize 32-bit IP addresses. They transmit Ethernet packets at 48-bit Ethernet addresses. Therefore, the IP drive must convert the destination IP address
Permanent page removal (301 redirects ) is a very important "auto-steering" technology. One of the most feasible ways to redirect URLs. When a user or a search engine makes a browse request to the Web server, one of the status codes in the header
Both ebtables and iptables use the netfilter framework, which is the same. However, the two actually need to be linked. Many people do not understand the difference between the Redirect of the ebtales broute table and the Redirect of the NAT table
Http://blog.chinaunix.net/uid-346158-id-2131136.html
In linux, apart from primary, there are two types of IP addresses:1. ip alias (sub-interface)2. secondary ip (secondary ip)Can be added to a physical network card. alias is added by ifconfig.
According to the detailed description of the pure IP database format in LumaQQ developer documentation, I have compiled a PHP class for querying IP address region information. During the compilation process, I found that the description of the
This article provides a detailed analysis of the implementation of php based on ip address query in the region where it is located. if you need a friend, refer to the dat file and the information file about the ip address corresponding to the region.
Dat file, information file about the ip corresponding region
Qqwry. dat file
Download it online by yourself
Class file, parse the qqwry. data FileIpLocation. php fileCopy codeThe Code is as follows: Class IpLocation {/*** @ Var resource
In the previous analysis of my company's website keyword ranking disappeared mentioned (now from the company resigned), the company's website keyword ranking disappeared the most likely reason is 302 redirect, now can be determined, is because of 302
This article provides a detailed analysis of the implementation of php Based on ip address query in the region. For more information, see
This article provides a detailed analysis of the implementation of php Based on ip address query in the region.
A few years ago, I remember writing a few articles about Linux removal support for the path cache, the routing cache class is derived from the reconfiguration of the route subsystem, the specific reason is no longer repeated, this article will
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