stream.Data link------through a variety of control protocols, the error of the physical channel into error-free, reliable transmission of data frame data-linked sniperThe network layer--------Select the most appropriate path for the message or packet through the communication subnet through the routing algorithm.The transport layer--------provide users with reliable end-to-end error and flow control to ensure the correct transmission of the messageSession Layer--------provides a way for the pre
) broadcast domain (broadcast address: 255.255.255.255 )3 ) Basic functions of the switcha , learn --mac Address (Dynamic -- default behavior, Manual, paste)b , forwarding -- based on MAC Address Table ForwardingC , filtering -- Data4 ) features of the switcha , mixed port rate ( 10m/100m/1g self-adapting)b , high port density (many interfaces --24/48 , StackingC , based on low cost per portD , fast switching speede , CacheEach interface of a router cannot be configured with the same network seg
Document directory
1.1Neo4j Server Installation
1.2Neo4j Server configuration parameters
2.1 install the Spatail plug-in of Neo4j Server
2.2 Neo4j Server spatial operations
1.1Neo4j Server Installation
1.2Neo4j Server configuration parameters
2.1 install the Spatail plug-in of Neo4j Server
2.2 Neo4j Server spatial operations
Graph database practice series (iii) -- REST integration of Neo4j Spatial-Forest Farm-blog Park
Graph database pr
Learning from scratch _ JavaScript _ series (8) -- js series (2) (event trigger sequence, text reading, js compiling ajax, input validation, and down menu)
(20) event trigger sequence
If there are multiple scripts in the document (for example, automatically executed scripts), they are executed in a certain order (in the HTML document ):
① Execute first
The output is green, and the background color turns gr
Common development skill series (3) and development skill Series
Problems arising from hot updates:
Two days ago, I was talking about the iOS hot update problem. As a result, I hit the gun today. Really! The review is rejected. Of course, this is not a question about RN or JSPath used in my own project. It is a question !! Autonavi updated its SDK as soon as it was pushed out. It was updated only today. Tha
[Problem]-avionics OJ-1465 is not easy one of the series, one of the oj-1465 Series
Problem Description we often feel that it is really not easy to do one thing well. Indeed, failure is much easier than success!It is not easy to do the "one thing" thing well. If you want to succeed forever and never fail, it is even harder, just as spending money is always easier than making money.Even so, I still want
Linux development environment build and use series of tutorials, linux build series of tutorials
00. Linux development environment setup and use 1-A Brief History of Linux
01. Build and use the Linux development environment 2-Linux system (ubuntu) Installation Solution
02. Build and use the Linux development environment 3-install the system through a virtual machine (ubuntu)
03. Build and use the Linux deve
ED/EP Series 5-consumption commands and edep series commands1. Consumption transactions
A consumption transaction allows the cardholder to use the balance of the electronic passbook or wallet for shopping or obtaining services.Features:1) -- it can be performed offline on the POS terminal.2) -- the personal identification code (PIN) must be submitted for consumption transactions using the electronic passboo
[Of algorithm series] parallel query set (non-Intersection Set), algorithm series 2
I. Overview
The Disjoint set or Union-find set is a tree-type data structure. It is often used to process the merge and query of some Disjoint Sets.
There is a union-find algorithm that defines two operations for this data structure:
Find: determines the subset of an element. It can be used to determine whether two elements
Basic C language algorithms 09-all are the sum of Series a and series 09/*========================================================== ======================================Question: The number of columns is a, aa, aaa ,....... A + aa + aaa + ...... + Aaaaaaa .......========================================================== ======================================*/# Include Main (){Int a, I, n, x, Sn, flag = 1
Android Official Document Series (translation) and android Official Document Series
The following content is an article about the official Android documentation.
Cainiao is on the road. Learn and organize it. If you find any errors, please do not give me any further advice.Activity
Interpreting the basic knowledge of Android ActivityInterpreting Android tasks and Back stacksExplanation of Android Fragme
An error occurred in the English series for Android, and a pdf for the English series for androidAn error occurred in the English biography of Android Group
My new book "English for Android" has just been released, and I hope you will have more support. This article describes the city's errata. Due to the rush of time, there will inevitably be some errors in the book. Here, we will list these errata and ho
Deluxe Edition aircraft vs series (III) and deluxe edition aircraft vs Series
This article describes the enemy classes in the game, including the implementation of the enemy classes in EnemySprite. h and EnemySprite. cpp.
There are four main types of enemies in the game. Three different enemy hosts and bombs are randomly stored on them, and each enemy has its own life value, when the life value is 0, it wil
Sed series: deletes a specific row based on the row or mode match. sed series mode matches."P" command prints the buffer (remember to use-n option with "p ")"D" command is just opposite, its for deletion. 'd will delete the pattern space buffer and immediately starts the next cycle.Syntax:# Sed 'address 'd filename# Sed/PATTERN/d filenameLet us first creates thegeekstuff.txt file that will be used in all th
Json Series 3 allows you to print the perfect json format, json series printing format
public static String format(String jsonStr) { int level = 0; StringBuffer jsonForMatStr = new StringBuffer(); for(int i=0;i
With the above format code, you can print your json file perfectly
The example is still in the bean to json blog.
{"addresses":[{"address":"address1","sameTest":[{"addresses":[
From design to development series (1) --- Axure basics 1, Series --- axure
Over the past two days through the good teachers and friends network online education curriculum http://www.elsyy.com/course/5065, the small building teacher to explain Axure RP 7.0 from entry to the proficient, I feel very good. So I paid 199 yuan to buy the entire tutorial. I'm listening.
According to the maintenance plan, this w
ROS Learning Series and ros Learning Series
We have already discussed how to use URDF to build a robot car and display it in the simulation environment of Rviz, but the car is still. The following describes how to make it work in Rviz and clarify the relationship between URDF, TF and odom.1. Relationship between base_link, odom, fixed_frame, target_frame, and map in ROS
Base_link is usually defined in the u
Linux monitoring tool introduction series-free and linux monitoring series-free
In Linux, we can view and monitor the system memory usage. The most common command is free. The free command is actually very simple, and the parameters are also very simple, but you may not know much about it. The following is a summary of the free commands I know. If any, please note. Many knowledge points in this Article ref
Huge pages Series 3, hugepages Series
Use the following shell script to calculate the large page configuration parameters. Make sure that the data instance has been started before using the script,
If the database version is 11 GB, check whether Automatic Memory Management (AMM) is used)
++ ++ ++#! /Bin/bash## Hugepages_settings.sh## Linux bash script to compute values for# Recommended HugePages/HugeTLB con
HTML series (4): editing images, html series editing Images
I. Basic concepts of images
1. vector graph: The file occupies a small amount of space. The enlarged image will not be distorted and is irrelevant to the resolution. Suitable for graphic design, text design, Logo Design, layout design, etc.
2. Bitmap: consists of pixels. The file is large, and the enlarged and reduced images are distorted.
3. lossy
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