ip subnetting examples

First, a sample from a Shehiren teacher's book is referenced:Host H1 the process of sending packets to H2:First, with the subnet mask in the subnet:255.255.255.128 and target host H2 IP address:128.30.33.128 and get network number: 128.30.33.128. Obviously this does not match the network number of Subnet 1:128.30.33.0.The datagram is then forwarded by the default route R1 Subnet 1. At this point, R1 will look for its own routing table. Think of the ho

Learning examples of conventional network configuration commands and advanced IP address routing commandsBy kindgeorge 2005.5.9Knowing how to configure network commands is a must-have technique for general technicians. After some time of research and study, I have summarized some common commands and examples for future reference.The traditional

12 ip command examples Year after year, we have been usingifconfigCommand to perform network-related tasks, such as checking and configuring Nic information. HoweverifconfigIt is no longer maintained and abolished in the latest version of Linux!ifconfigThe command has beenipCommand is replaced. ipCommand andifconfigThe command is somewhat similar, but more powerful. It has many new features.ipMany Commands

interface eth1(3)-T: Time stamp not shown(4)-S 0: The default fetch length is 68 bytes when fetching packets. Plus-S 0 can catch complete packets(5)-C 100: Fetch only 100 packets(6) DST Port! 22: Packets that do not crawl the destination port are 22(7) SRC net 192.168.1.0/24: The source network address of the packet is 192.168.1.0/24(8)-W./target.cap: Save as a cap file for easy analysis with ethereal (i.e. Wireshark)Http://www.cnblogs.com/ggjucheng/archive/2012/01/14/2322659.htmlHttp://network

-Default 192.168.120.240 0.0.0.0 UG 0 0 0 eth0[Email protected] ~]# Route del-net 224.0.0.0 netmask 240.0.0.0 Reject[Email protected] ~]# routeKernel IP Routing TableDestination Gateway genmask Flags Metric Ref use Iface192.168.120.0 * 255.255.255.0 U 0 0 0 eth0192.168.0.0 192.168.120.1 255.255.0.0 UG 0 0 0 eth010.0.0.0 192.168.120.1 255.0.0.0 UG 0 0 0 eth0Default 192.168.120.240 0.0.0.0 UG 0 0 0 eth0[Email protected] ~]#DescriptionExample 5: Delete a

eth0[Email protected] ~]# Route del-net 224.0.0.0 netmask 240.0.0.0 Reject[Email protected] ~]# routeKernel IP Routing TableDestination Gateway genmask Flags Metric Ref use Iface192.168.120.0 * 255.255.255.0 U 0 0 0 eth0192.168.0.0 192.168.120.1 255.255.0.0 UG 0 0 0 eth010.0.0.0 192.168.120.1 255.0.0.0 UG 0 0 0 eth0Default 192.168.120.240 0.0.0.0 UG 0 0 0 eth0[Email protected] ~]#DescriptionExample 5: Delete and add set default gatewayCommand:Copy Co

One, code example #-*-Coding:utf-8-*-import requestsheader = {' user-agent ': ' mozilla/5.0 (Windows NT 6.1;Win64; x64) applewebkit/537.36 (khtml, like Gecko) chrome/53.0.2785.143 safari/537.36 '}proxy_ip = {' https ': ' https://115.28.1 48.137:8118 '}html = Requests.get ("http://www.baidu.com", Headers=header, proxies=proxy_ip) print Htmlprint Html.text Second, by modifying the proxy IP server address of the PROXY_IP parame

This article mainly introduces PHP with asterisks to hide some of the user name, ID, IP, mobile phone number and other examples, the need for friends can refer to the following A, imitation Taobao comments purchase records hidden part of the user name, the following code is available. nbsp; nbsp; Code as follows: function Cut_str ($string, $sublen, $start = 0, $code = ' UTF-8 ') {nbsp; nbsp; if ($code = =