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Chapter 1: a goal A ship with no sailing targets, the wind in any direction is against the wind 1. Why are you poor? The first point is that you have not set the goal of becoming a rich man. 2. What are your core goals in your life? The fundamental difference between an outstanding person and a mediocre person is not talent or opportunity, but whether there is a goal or not. 3. One step ahead: Succe

Chapter One: a goal A ship without a sailing target, wind in any direction is upwind. 1, why you are poor, the 1th is that you have not set a goal to become rich 2. What is your core goal in life? The fundamental difference between a distinguished person and a mediocre is not a gift, an opportunity, but a goal. 3, one step ahead of the start, life ahead of a big step: Success starts from the selected target

Let's take a look at the differences between Layer 2 switches, Layer 3 switches, and Layer 4 switches. (1) Differences Between Layer 2 switches, Layer 3 switches, and Layer 4 switches The layer-

From: http://www.juniperbbs.net/viewthread.php? Tid = 5859 extra = Page % 3d1% 26amp % 3 bfilter % 3 ddigest The layer-2 switching technology is mature. The layer-2 switch is a data link layer device that can identify the MAC address information in the data packet and forward it according to the MAC address, the MAC

Layer-2, layer-3, and layer-4 switches have different characteristics. layer-2 switching is a mature technology. A layer-2 switch is a data link layer device that can identify MAC address information in data packets, forward based on the MAC address, and record these MAC add

As can be seen from the analysis of the 4th section, binary search tree is a very good data structure, can quickly find a given keyword data items, and can quickly insert and delete data items. But binary search tree has a very troublesome problem, if the tree is inserted in random data, then the performance is good, but if the insertion is ordered or reverse-order data, then the two-fork search tree execution speed becomes very slow. Because the binary tree is unbalanced when inserting values i

1) layer-2 Exchange Technology The layer-2 switching technology is relatively mature. The layer-2 switch is a data link layer device that can identify MAC locations in data packets.Address information, which is forwarded based on the MAC address, and the corresponding MAC addresses and ports are recorded in a local location.Address Table. The specific workflow is

by element id, class, and tagName. 1. $ ("# id"): id selector, document. getElementById ("id "); 2. $ ("div"): Element selector document. getElementsByTagName ("div "); 3. $ (". myClass"): class selector, which returns all elements of class = "myClass" 4. $ ("*"): returns all elements, mostly used for context search. 5. $ ("div, span, p. myClass"): A Multi-condi

The layer-2 switching technology is mature. The layer-2 switch is a data link layer device that can identify the MAC address information in the data packet and forward it according to the MAC address, the MAC addresses and corresponding ports are recorded in an internal address table. The specific workflow is as follows: (1) When the switch receives a packet from a port, it first reads the source MAC addres

2-3-4 is a type of B tree with a level of 4. It is a self-balancing data structure that can be searched, inserted, and deleted in O (lgn) time. Here N is the number of elements in the tree. 2-3-

In the PHP language, for digital characters and numbers how to participate in the operation, in specific cases will be determined, for example: echo "3+4+5"; Results: 3+4+5. Because it is treated as a string. When echo1+2+ "3+

L2 exchange technology:The layer-2 switching technology is mature. The layer-2 switch is a data link layer device that can identify the MAC address information in the data packet and forward it according to the MAC address, the MAC addresses and corresponding ports are recorded in an internal address table. The specific workflow is as follows: 1) when the switch receives a packet from a port, it first reads

document elements on the Operation page · Basic selector exercises The JQuery selector is used to find elements that meet the conditions. The basic selector is the most commonly used selector in JQuery and the simplest selector. it searches for dom elements by element id, class, and tagName. 1. $ ("# id"): id selector, document. getElementById ("id "); 2. $ ("div"): Element selector document. getElementsByTagName ("div ");