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without tag;In practice, various connection methods are implemented according to the access, Trunk, and hybrid properties of the device ports. The application of port attributes is also far beyond the simple VLAN member interconnect, especially our division, with Port properties to implement some relatively complex functions, such as Isolated-user VLAN, multicast VLAN.Principles of processing 3.3 Tag/untag

Copyright NOTICE: This article is for bloggers original article, if need reprint please indicate source and author.This article by Xiao Li column original, reprint need to indicate the source: "http://blog.csdn.net/softwave/article/details/8907599"A recent project that requires Java to read a small pound of data in a pound room requires that Java be used to communicate with the serial port. Serial port Java

I am working on a plug-in recently.ProgramTo obtain data from other programs from the serial port, but the problem is that the serial port is exclusively used, that is, only one program can read or send data to the serial port. So how can I obtain the same serial port data from other programs without shutting down oth

PHP-made port sniffer--you can specify the website and port and return the sniff results. function Http_request ($server, $port) { $data = ""; $query = "head/http/1.0"; $fp = Fsockopen ($server, $port); if ($fp) { Fputs ($FP, $query. " Rnn "); while (!feof ($fp)) { $data. = Fread ($fp, 1000); } Fclose ($FP); } return $

Use the accelerator key win+r to open the Run window. Enter CMD return to open a command prompt window 1: View the port that is open for this machine, that is, the number of ports that have been occupied. Command: Netstat-an Partial results list: Proto Local Address Foreign TCP 0.0.0.0:135 0.0.0.0:0 Listening TCP 0.0.0.0:3473 0.0.0.0:0 Listening TCP 0.0.0.0:8009 0.0.0.0:0 Listening The local addresss corresponds to this column, ":" is the open

Port Scan path:What is a scanner?A scanner automatically detects remote or local host security vulnerabilities.ProgramBy using a scanner, you can discover the distribution of various TCP ports on the remote server and the services provided and their software versions! This allows us to indirectly or intuitively understand the security problems of remote hosts. Working PrincipleThe scanner collects a lot of useful information about the target host (f

In Windows, how does one find and use port and release port? Introduction: during daily work, when an application is started, the system prompts that the xxx port is occupied and the application cannot be started normally. How can I find an application that occupies a specific port and release it? This document descri

Release ttys0 as the communication serial port # Include # Include # Include # Include # Include # Include Void closeconsole (void ){ Int FP;Struct termios options;Printf ("Change1 \ n ");Fp = open ("/dev/tty1", o_rdonly); // change the ConsoleIOCTL (FP, tioccons );Close (FP ); Fp = open ("/dev/TTS/0", o_rdwr | o_noctty | o_ndelay); // open the serial port 0 for reading and writingIf (FP =-1) Exit (0 );Tcge

Mysql opens remote port 15.04 and port 3306 in ubuntu 15.043306. Ubuntu 15.04 opens mysql remote port 3306. All of the following operations are performed in the terminal. First, check whether netstat-an | grep 3306 is enabled on the port. This figure shows that port 330

PHP Port Sniffer (can specify website and port) function Http_request ($server, $port) { $data = ""; $query = "head/http/1.0"; $fp = Fsockopen ($server, $port); if ($fp) { Fputs ($FP, $query. " Rnn "); while (!feof ($fp)) { $data. = Fread ($fp, 1000); } Fclose ($FP); } return $data; } ?> if ($action = = "Query") {

PHP-made port sniffer--you can specify the website and port and return the sniff results. function Http_request ($server, $port) { $data = ""; $query = "head/http/1.0"; $fp = Fsockopen ($server, $port); if ($fp) { Fputs ($FP, $query. " Rnn "); while (!feof ($fp)) { $data. = Fread ($fp, 1000); } Fclose ($FP); } return $