Summary of basic network knowledge II

Http protocol URL Usually, the "website" we commonly call is actually the URL urlencode and urldecode The urlencode method is to convert any parameter we give into a string suitable for placing in the URL. Specific rules: Letters, numbers and hyphens remain unchanged.Convert spaces to plus signs.All other characters are con ...

Added by jigaruu on Wed, 27 Oct 2021 16:22:06 +0300

Cloud computing learning notes (11) (spanning tree protocol STP and MSTP)

Spanning tree protocol (STP) STP overview Generation of switching network loop Formation of broadcast storm Multiframe copy MAC address table disorder Introduction to STP STP - Spanning Tree Protocol Logically disconnect the loop to prevent broadcast stormWhen the line fails, the blocking interface is activated to restore commu ...

Added by LucienFB on Mon, 25 Oct 2021 07:43:58 +0300

Detailed explanation of Unet network for image segmentation

This note is based on the tensorflow-2 version and is contributed first code perhaps Download code (scientific Internet access may be required). What is image segmentation In the image classification task, the network assigns a label (or category) to each input image. However, suppose you want to know the shape of the object, which pixel belo ...

Added by niki77 on Wed, 20 Oct 2021 21:07:19 +0300

Using mininet to build p4 data plane

preface Last P4, into network data plane programming This paper briefly introduces P4 and builds P4 network topology through the command line. The building process requires a lot of commands, which is cumbersome. In this article, we will build P4 through python script. The code involved in this article is: https://github.com/cykun/p4-mininet ...

Added by nthomp on Mon, 04 Oct 2021 05:13:43 +0300

Network performance monitoring tool smoking

What is smoking? Smokeping is an open source software for monitoring network status and stability (developed by the author of RRDTool). It can monitor network conditions such as delay, packet loss rate, BGP multi line and so on; Smokeping will send various types of test data packets to the target equipment and system, measure and record, ...

Added by WebMonkey on Sun, 19 Sep 2021 06:55:48 +0300

Installation and configuration of Ubuntu firewall

Ubuntu Install UFW firewall sudo apt-get install ufw For general users, only the following settings are required: sudo apt-get install ufw sudo ufw enable sudo ufw default deny The above three commands are safe enough. If you need to open some services, you can use sudo ufw allow. Enable sudo ufw enable sudo ufw default deny #Aft ...

Added by konn on Fri, 10 Jul 2020 19:12:17 +0300

Android implements request HTTP authentication

These days, the development of external SDK, can achieve landing, payment.Similar to developing a set of QQ, WeChat third party login.The authorization protocol used is OAuth 2.0.Among them, Http Authentication is used, and you can consult the online materials. There are all kinds of answers, some don't know if they have been verified, and some ...

Added by ekalath on Fri, 10 Jul 2020 17:54:48 +0300

An algorithm for searching all paths between two points based on a graph's contiguity list implementation

The algorithm is implemented in C++. Why write this algorithm? Because it is so hard to find only the implementation of the adjacency matrix on the network, I have made an implementation of the adjacency chain table myself, which can increase the speed. This is achieved by using one of three stacks to traverse all vertices, the second stack t ...

Added by LoganK on Thu, 02 Jul 2020 18:16:21 +0300

cocos2d loads plist files (frame animation)

Integrate the pictures into one large picture, reduce the picture occupancy, there are plist files and png supporting files. cocos loads plist files in two ways (queried) 1. If you load in the following way, your plist file must contain an animations node, otherwise the load will fail auto cache = AnimationCache::get ...

Added by zahidraf on Tue, 30 Jun 2020 19:21:37 +0300

Huawei -- DHCP experiment

@Huawei - DHCP experiment preface DHCP (Dynamic Host Configuration Protocol) is a protocol designed by IETF to realize automatic IP configuration. It can automatically assign TCP/IP parameters such as IP address, subnet mask, IP address of default gateway and DNS server for clients 1: Experimenta ...

Added by mikeweb on Mon, 29 Jun 2020 11:02:44 +0300