ccna levels

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ICMP Echos to 192.168.20.1, timeout is 2 seconds: .!!!! Success rate is 80 percent (4/5), round-trip min/avg/max = 24/48/84 MS From the above, we can see that through the deployment of layer-3 switching technology, the host between VLANs can communicate with each other. This experiment is complete. [PL1]Disable layer-3 routing to simulate hosts. [PL2]Define the default gateway. [PL3]Enable the layer-3 routing function. By default, the layer-3 Switch disables the routing function. To enable int

This section lets us learn the next Frame RelayFrame Relay in CCNA's exams and daily work are seldom useful, but we still want to know, it is after all a CCNA in the focus.Frame Relay (Frames relay)Also referred to as FRFrame Relay is an important WAN technology, its main function is to connect two or more long-distance LAN. Frame Relay is mainly a packet switching technology, usually we just want to know how to connect LAN through Frame Relay and lon

CCNA Study Notes (ii)--Initial knowledge of Cisco devicesIn the previous chapter we recognized the fundamentals of networking, and now we are formally exposed to Cisco devices.1, first we first understand the main components of a Cisco device:ROM (read-only memory): mainly save the post software, save the router boot boot program.RAM (random memory): loss of data, can store configuration files. >>> equivalent to PC memoryNVRAM (non-volatile memory): p

Package ms100;/** * A step with a total of n-level, if you can jump 1 levels, you can jump 2 levels, the total number of total hop method, and analyze the algorithm time complexity * Note: This problem has recently appeared, including MicroStrategy More attention to the algorithm of the company has selected a problem as a face test or pen test. First of all, we consider the simplest case: if there is only 1

Analysis of three levels of software development, analysis of software development levels In the morning, I saw Mr. Guo Anding's microblog on Weibo. I also posted a new article on Weibo to write this article. Fei xiaotong, a late Chinese sociologist, believes that culture should contain three levels: the first level is the tool for production and life, and wha

Tags: see the presence of post read data logs difference failed data targetIsolation: Personal understanding is to ensure that two simultaneous transactions do not feel the other side of the existence of each other, do not affect each other. And the other three principles (atomicity, consistency, persistence) are the principles that need to be noted for data manipulation. In order to meet the isolation, the auxiliary proposed 4 isolation levels, of co

Depressed, the attack power is so strong, but in group P, the king of 10 levels of Hill is always first suspended. This is the case many times! The output battle logs are as follows: [Hero name: Mountain King, lifecycle: 500, basic defense: 2][Hero name: priestess of the Moon, life value: 500, basic defense: 1][Hero name: King of 10 levels of Hill, life value: 500, basic defense: 1]The battle begins ......1

Repeat A Critique of ansi SQL Isolation Levels, critiqueisolationA Critique of ansi SQL Isolation Levels1. Published on April 9, 1995.2. SQL defines four isolation levels by symptom (phenomena), but it is too different from the actual system.3. SQL does not cover some common Isolation levels, especially Snapshot Isolation under multi-version concurrency control.4

Given a non-empty binary tree, return the average value of the nodes on each level in the form of an array.Example 1:Input: 3 / \ 9 20 / \ 7Output: [3, 14.5, 11]Explanation:The average value of nodes on level 0 are 3, on level 1 are 14.5, and on level 2 is 11. Hence return [3, 14.5, 11].Note:The range of node ' s value is in the range of 32-bit signed integer.This title describes:give us a completely binary tree, and we'll find out the average of nodes for each layer of the two-

results of the analysis of three methods are consistent, the difference of hormone levels in different groups is significant, sex and age have no effect on hormone level.1. Case backgroundUnder the control of other factors, the study of hormone levels in the control group and the experimental group (with stomach cancer) was different among two groups.2. Data understandingSingle Variable Description:To see

Acid is the cornerstone of database theory. It defines four properties required by a theoretically reliable database: atomicity, consistency, isolation, and persistence. Although these four attributes are important, isolation is the most flexible. Most databases provide some available isolation levels, and many databases now have additional layers to create finer isolation granularity. The wide range of isolation-level applications is mainly because t

In-depth understanding of four isolation levels of Mysql and four mysql 1. What is a transaction first? A transaction is a series of strict operations in an application. All operations must be completed successfully. Otherwise, all changes made in each operation will be revoked. That is to say, a transaction is atomic, and a series of operations in a transaction either succeed or do not. There are two types of transactions to end. When all the steps i

results of successful transaction commits, the database is said to be in a consistent state. If a database system fails in operation and some transactions have not yet been completed, some of the modifications made to the database have been written to the physical database, and the database is in an incorrect state, or an inconsistent state. 3, isolation. Execution of one transaction cannot interfere with other transactions. That is, the operations within one transaction and the data used are i

Log levels Pages A Home Adding additional libraries to the CLASSPATH Advanced Configuration Basic Configuration Configuring the JVM, the JMeter process runs in FAQ Log levels modifying Properties Proxy Configuration Remote Server Configuration Selecting Tests to Run Test Results File Format Clone this wiki locallyClone in Desktoplog

Performance Echelon: Let leaders at all levels make the right performanceBasic InformationOriginal Title: the performance pipeline: getting the right performance at every level of leadershipBy Stephen drotter)Translator: Sun heying, Liu jingmei, Ouyang lingxiang, Zhou YuSeries name: Leader echelon constructionPress: Machinery Industry PressISBN: 9787111399261Mounting time:Published on: February 1, October 2012Start: 16Page number: 1Version: 1-1Categor

four isolation levels provided by MySQL: Serializable (serialization): Can avoid dirty reading, non-repeatable reading, the occurrence of phantom reading REPEATABLE READ (Repeatable Read): Can avoid dirty read, non-repeatable read occurrence Read Committed (reading committed): prevents dirty reads from occurring READ UNCOMMITTED (unread): lowest level, unavoidable The top four levels