Looked at many times, just to sort out my understanding of the whole communication process, the following, will continue to learn to supplement the correction:When communicating using the TCP/IP protocol family, there are three key identifying information: MAC address, IP address, and port number.
The MAC
1 Basic ConceptsAn IP address is an Internet protocol address, each Internet package must have an IP address, and each Internet service provider (ISP) must request a set of IP addresses from the organization concerned, and then ge
Reserved IP address AssignmentThe unification of IP addresses on the Internet is managed by an organization called the IANA (Internet Assigned Numbers Authority, internet network number distribution agency). Depending on the purpose and security level, IP addresses can also be broadly divided into two categories: publi
Network broadcast address calculation method: (1) bitwise AND operation on the IP address and subnet mask to obtain the network address (2) "inverse" Operation on the subnet mask, then perform the bitwise OR operation with the network address to obtain the
In the campus network, the most convenient way to make trouble is to steal someone else's IP address, the computer that is embezzled IP address not only can not use the campus network normally, but also will frequently appear the IP addr
650) this.width=650; "src=" http://imga.chrome001.com/article/201603/24/2145032eeekhcvevwinciu.png "border=" 0 " Class= "Shadow" alt= "My IP Address" style= "border:0px;vertical-align:middle;margin-bottom:0px;"/>Plugin Introduction:Many times we need to use the IP address, this noun may be known to everyone, but do you
Http://blogold.chinaunix.net/u1/43206/showart_518836.htmlSocket INADDR_ANY listens to the 0.0.0.0 address. The socket only binds the port so that the route table decides which ip address to transfer.INADDR_ANY indicates the address 0.0.0.0. In fact, this address indicates an
This article mainly introduces the thinkphp to obtain the client IP and IP address query method, combined with the case analysis of the thinkphp for the client IP address operation of the relevant functions and the use of skills, the need for friends can refer to the next
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In the LAN, we often encounter the situation of IP address conflict, in fact, because others arbitrarily modify the IP address caused by, this article for you to introduce some methods to prohibit the modification of IP address.
In network management, IP address theft often occurs, not only affecting the normal use of the network, but also because the stolen address often has high permissions, as a result, it also causes a lot of economic losses and potential security risks to users. Are there any measures to prevent such phenomena as much as possible? To prevent
Welcome Reprint! When reproduced, please indicate the source:http://blog.csdn.net/nfer_zhuang/article/details/42609733IntroductionUsage scenarios:I use the Linux server has more than one network card, sometimes need to use the script to specify the IP address of the network card or MAC address, then there are two approaches, one is to pre-read the network card
In the network management, the phenomenon of IP address embezzlement often occurs, not only affects the normal use of the network, at the same time, because the stolen address often has a higher privilege, it also causes a lot of economic losses and potential security risks to users. Are there any measures to minimize the occurrence of such phenomena? In order to
Read the premise: you need to know what the IP address Purpose of this chapter: to realize the mutual transfer of IP address and long type value I. Scope of APPLICATION Typically used in requirements such as login restrictions, locating IP cities, and so on, Windows's ping
Bind IP addresses and MAC addresses to prevent IP address theft.In a local area network, the most convenient way to disrupt the network is to steal others' IP addresses. Computers with stolen IP addresses are not only unable to use the campus network normally, but also frequ
Each Ethernet device has a unique MAC address at the factory, why do I need to assign an IP address to each host? or if each host is assigned a unique IP address, why should a unique MAC address be embedded in the production of a
The example in this article describes how thinkphp obtains client IP and IP address queries. Share to everyone for your reference, specific as follows:
The public function of the system that obtains the client IP address in TP is the function get_client_ip (). The return va
One, about Taobao IP address library
The services we currently offer include:1. According to the IP address provided by the user, the geographic and geographic information of the IP address is quickly queried, including the state
How PHP prohibits access to an IP or IP address segment
This article mainly introduces the PHP prohibit IP or IP address segment access method, involving the server variable $_server, file and string operation skills, with a cert
In RedHatlinux, after installing the linux system, set a fixed IP address for the NIC (bound to two IP addresses), and then configure the nic ip address in command mode. The configuration file is usually/etc/sysconfig/network-scripts/ifcfg-interface-namewww.2cto.com1. config
Php code for obtaining the physical address of the specified IP address (regular expression ). If you build your own IP database to occupy resources and the update is inconvenient, why not use a ready-made IP address for query? Be
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