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I found a lot online,CodeThere are not many details about the principles. I 'd like to explain a few articles. One TechnologyArticle, The most important thing is to clarify the principle, if there is a complete operationSource codeAlso, the key is to clearly analyze the core part of the code. (1) origin: Most computers use dynamic IP addresses to access the Internet. Intranet IP addresses are alloca
Discuz 5.0 is not using their own IP data, but the use of pure IP data format, access to the pure IP database a little bit of trouble, its storage format is very special and interesting, specific format analysis refer to the following two links, other languages to implement the link at the end of the reference article. "Pure
A:Virtual machine is a desktop installation1. Virtual machine-Settings-Network adapter sub-option-select "Bridge mode"2. Select System in Virtual machine-preferences (Preferences)-Network connection (Networking Connections)3, if you click on the SYstem eth0 for editing, do not choose to add and then edit, select IPv4 settings (IPv4 Settings)-Add double-click to add(Subnet mask, gateway, DNS are set to the same as the host, the IP address can be set to
1. Set up dynamic IPIfconfig eth0 192.168.1.12is set to take effect immediately after restarting the machine.2. Set the static IPEdit File/etc/sysconfig/network-scripts/ifcfg-eth0Device=eth0Bootproto=dhcpOnboot=yeshwaddr=00:0c:29:16:e5:8cAdd to:ipaddr=192.168.1.12netmask=255.255.255.0gateway=192.168.1.1Type=ethernetTwo lines, change the bootproto=dhcp to bootproto=static, note that the Bootproto value must be modified to static (static), modified after the restart of the server (reboot) to take
Importurllib.requestImportRedefopen_url (URL): Req=urllib.request.Request (URL) req.add_header ("user-agent",'mozilla/5.0 (Windows NT 6.1; WOW64) applewebkit/537.36 (khtml, like Gecko) chrome/55.0.2883.87 safari/537.36') Response=Urllib.request.urlopen (req) page=Urllib.request.urlopen (req) HTML= Page.read (). Decode ('Utf-8') returnHTMLdefget_img (HTML): P= R'(?:(?: [0,1]?\d?\d|2[0-4]\d|25[0-5]) \.) {3} (?: [0,1]?\d?\d|2[0-4]\d|25[0-5])'IPList=Re.findall (p,html) foreachinchIPList:Print(eac
Failure phenomenon: Intranet within the enterprise. One of the computer and services in the marketing department of a computer at the start, there are always two computer IP address conflicts. Changing the IP address of both computers is still a problem, and in the case of conflict, only one computer can surf the Internet. Fault analysis and elimination: According to the fault analysis, this fault may be t
Transfer http://blog.csdn.net/goodboy1881/article/details/668556 ------------------------------------------------------ Put the three Protocols together for learning because these three protocols are on the same layer. ARP is used to find the MAC address of the Ethernet NIC of the target host, and the IP address carries the message to be sent. The data link layer can get the data transmission information from ARP, and get the data information to be tr
Put these three protocols together because the three protocols are on the same level, the ARP protocol is used to locate the target host's Ethernet NIC MAC address, and the IP hosts the message to be sent. The data link layer can get the data transfer information from ARP, and the data to be transmitted from IP.1.IP protocolThe
I. Introduction: IP is the most core protocol in the TCP/IP protocol family. All TCP, UDP, ICMP, and IGMP data are transmitted in IP datagram format. Note that the IP address is not a reliable protocol, the IP protocol does not provide a processing mechanism after the data i
IP router technology is still quite common, So I studied the Key Technology Analysis of IP router technology and IP Phone. Here I will share it with you and hope it will be useful to you. IP phones are the economic advantage of combining voice data integration with the technical progress of voice/grouped
# # Example Admin site server { server_name $HOSTNAME. dashboard.example.com; Listen 80; # Http://serverfault.com/questions/242218/how-to-disable-http-basic-auth-in-nginx-for-a-specific-ip-range satisfy any; Allow 210.22.143.202/32; Deny all; Auth_basic "Example restricted"; Auth_basic_user_file htpasswd; Error_page 404/404; Error_page 503/503; #charset Koi8-r; Access_log Logs/dashboard.access.log; Error_log Logs/dashboard.error.log; Lo
I. TCP/IP background and introductionIn the 70 's, with the development of computer technology, computers users realized that it was necessary to connect computers from all over the world to play a more important role in computer. But the simple connection is not enough, because the computer can not communicate. Therefore, the design of a common "language" to communicate is necessary to be less, then the TCP/IP
IfconfigRouteIpIP routeOne, ifconfig command (view or configure IP)1. View Network Connections# ifconfig \ Show all active connections, not packet-disabled devicesOr# IFCONFIG-A \ Show all active and inactive connectionsDisplays the connection for the specified interface# ifconfig Eth12. Configure IP Address# ifconfig eth1 192.168.0.1 netmask 255.255.255.Or# ifconfig eth1 192.168.0.1/243. Enable or disable
Recently, the server is configured locally and the home bandwidth does not have a fixed IP address. Therefore, you must obtain your own public IP address. The server version of CentOS6.5 is naturally unable to obtain the public IP address through browser access. Therefore, record some methods for getting public IP addr
IP datagram Header highest bit on the left, recorded as 0 bit, the lowest bit on the right, recorded as a bitVersion:4 bits, refers to the IP protocol version of the current IP protocol version number is 4 (that is, IPV4)Header Length:4 bits, the maximum value that can be represented is 15 units (4 bytes in one unit) so the maximum of the first ministerial degree
Today, the maintenance staff to find me said, recently to push Win7, temporary desktop cloud did not promote, or the use of manual installation of Win7 way. So, need me to help write a script, probably function is to ghost Win7 before the first export XP IP information, after ghost completion, automatically read this IP information to restore IP settings.Ghost ba
Using IP proxiesProxyhandler () format IP, first parameter, request target may be HTTP or HTTPS, corresponding settingBuild_opener () Initialize IPInstall_opener () Sets the proxy IP to global and automatically uses proxy IP when Urlopen () requests are used#!/usr/bin/env python#-*-coding:utf-8-*-import urllibimport ur
operating system and protocol software to manage the main tasks related to the network access layer. The modularization of the protocol stack enables software components in the network access layer dealing with hardware to provide interfaces for the upper layers unrelated to hardware. Network access layer and OSI model-- The physical layer in the OSI model is responsible for converting data frames into bit streams suitable for transmission media. The data link layer completes two independent ta
The IP protocol is the most important protocol in the family of TCP/IP protocols, which provides unreliable, non-connected datagram transport services. So understanding IP protocols is critical to our learning network.IP headerImportant Field Introduction：4bit First ministerial degree: in 4 bytes, determines the IP hea
International regulations: divide all IP addresses into A, B, C, D, and E. Class DefaultSubnet Mask: Class A is 255.0.0.0; Class B is 255.255.0.0; Class C is 255.255.255.255.0. The subnet mask is a 32-bit address. It is used to shield a part of the IP address to distinguish the network ID and host ID, and shows whether the IP address is on the LAN or on a remote
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