File upload and download in Java (based on FTP protocol)

Role of FTP Server FTP servers (File Transfer Protocol Servers) are computers that provide file storage and access services over the Internet. They provide services according to the FTP protocol. FTP servers are often used for file sharing and transmission and are an essential part of the Internet. Our file upload and download function is the ...

Posted by Liquix on Mon, 19 Sep 2022 21:02:52 +0300

Weblogic Series Vulnerability Recurrence

#Disclaimer: This is a personal note, which is only for learning. It is prohibited to use it for any illegal act. Any illegal act has nothing to do with me. Weblogic XMLDecoder Deserialization Vulnerability (CVE-2017-10271) Vulnerability Overview Vulnerability No.: CVE-2017-10271 Vulnerability impact: wls wsat XMLDecoder deserialization vu ...

Posted by chelsea7 on Sat, 17 Sep 2022 21:36:21 +0300

Network management related commands

1. Command netstat to display information such as local network connection, running port and routing table netstat command: used to display various network related information, such as network connection, routing table, interface status, dead link, multicast membership, etc. options -a : list all network connections in the system -t : List ...

Posted by Spitfire on Mon, 12 Sep 2022 21:01:50 +0300

System Programming (I/O)

How Ubunt u implements the cp function ps: copy the content of one file to another file, test: text, image, video #include <stdio.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> #include <string.h> int main(int argc, char*argv[]) { if(argc<3) { printf("Missin ...

Posted by dsp77 on Sun, 04 Sep 2022 08:27:48 +0300

vlan for network comprehensive training

vlan for network comprehensive training CSDN 1: Introduction to the switch 1) Introduction to collision domain, broadcast domain and mac address Collision domain: Collision domain refers to the set of all nodes connected to the same shared medium. All nodes in the collision domain compete for the same bandwidth. A message sent by a nod ...

Posted by Arsench on Thu, 01 Sep 2022 23:23:45 +0300

Using ESP32 to construct a ZIGBEE network transmission and transfer

Introduction: Using the networking function of ESP32, a serial port module of WiFi UDP to Zigbee is constructed. This module only sends UDP instructions to Zigbee's network, which replaces the original function. Note that the network address of ESP32 is 192.168.0.114. How can I get the IP address of ESP32? You can intervene in the 192 ...

Posted by roninblade on Tue, 09 Aug 2022 12:20:46 +0300

Network Engineering Fundamentals - Dynamic ACL s

Network Engineering Fundamentals - Dynamic ACL Experimental environment: EVE-NG Experimental topology: The underlying configuration (no sh is not typed out, just configure it by yourself): R1(config)#no ip routing R1(config)#ip default-gateway 12.1.1.4 R1(config)#interface e0/0 R1(config-if)#ip address 12.1.1.1 255.255.255.0 R2(config)#no ip ...

Posted by ndjustin20 on Wed, 25 May 2022 06:39:38 +0300

[eNSP] - Simple Configuration → Static Routing, Load Balancing, Backup Link

content 1. Static routing 1.1 Basic router configuration 1.2 Static routing configuration 1.3 Interoperability verification between hosts 2. Load sharing 2.1 Access the serial interface 2.2 Load sharing configuration 2.3 Check whether the new link is connected 3. Backup link 3.1 Alternate link configuration 3.2 Verify standby link ...

Posted by webmazter on Sun, 22 May 2022 07:49:11 +0300

[Linux] RHCE exam preparation review network communication netstat and ping commands

netstat command netstat command comes from the abbreviation of the English phrase "network statistics". Its function is to display various network related information, such as network connection status, routing table information, interface status, NAT, multicast members, etc. netstat command is not only applied to Linux system, but ...

Posted by perrij3 on Sun, 22 May 2022 03:35:27 +0300

Java_ Oriented programming

Tip: after the article is written, the directory can be generated automatically. Please refer to the help document on the right for how to generate it IP IP address: each computer is assigned an identification numberPort: the identity of the application package Network programming; import java.net.InetAddress; import java.net.Unknow ...

Posted by ocpaul20 on Sat, 21 May 2022 23:45:58 +0300