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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 addresses and corresponding ports in an internal

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

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. 2-3-4 trees are equivalent to the red-black tree, that is, each red-black tree can be

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 addresses and corresponding ports are recorded in an internal address table. The specific

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

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

Scan8 is hard to understand. The answer is as follows: Static const int x264_scan8 [16 + 2*4] ={/* Luma */4 + 1*8, 5 + 1*8, 4 + 2*8, 5 + 2*8,6 + 1*8, 7 + 1*8, 6 + 2*8, 7 +

of N.A very ingenious use of a property,n=n (n-1) can remove the property of the rightmost 1 in the binary of N, and the loop is removed until all 1 is removed, which reduces the complexity of the problem to only the number of 1. The code is as follows: int Func3 (int data) { ////data (Data-1) removes the rightmost 1 each time, removes how many 1, or contains several 1 int count = 0; while (data) { data = data (data-1); count++; } return count; } Exte

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

We are all familiar with multiplication of plural numbers: If $ Z_1 = x_1 + iy_1, Z_2 = X_2 + iy_2 $ is two plural numbers, then $ | z_1z_2 | = | Z_1 | \ cdot | z_2 | $. \ [(X_1 ^ 2 + Y_1 ^ 2) (X_2 ^ 2 + Y_2 ^ 2) = (x_1x_2-y_1y_2) ^ 2 + (x_1y_2 + x_2y_1) ^

Related reading: Express 4.X API Translator [i]--application Express 4.X API translation [II]-Request Chapter Express 4.X API translation [III]---response Express 4.X API translation [IV]---router Req.paramsThis is an object property that contains the named routing rule parameter. For example, if y

Chapter 4 Section 2 How the pivot table component processes data One of the most important and complex aspects of the pivot table component is how it interacts with various data sources and how it operates data in a session. This section explains how the pivot control communicates with the data source and how data is transmitted and operated during a session. The functionality of the pivot control is a bit

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 "); 3. $ (". myClass"): class s

This paper (howto) describes step-by-step installation of Oracle 9i database software on Fedora Core 2, 3, 4, 5 and 6. This paper covers following steps: Pre-instalation tasks Download Install Post-instalation tasks Common installation errors Pre-instalation tasks 1. Create Oracle user account Login as root and create te user oracle which belongs to DBA group. Su- # Groupadd DB

Unicode, ucs-2, ucs-4, UTF-16, utf-32, UTF-8 Unicode details Copyright Notice: It can be reproduced at will, but the original author charlee and original link http://tech.idv2.com/2008/02/21/unicode-intro/must be indicated in a timely manner. Maybe everyone has heard of Unicode, UCS-2, UTF-8 and other words, but what they specifically mean, what is the principle

[Switch] Problem:An array a [1 .. n] contains all from 0 .. all integers of N, but one of them is not in the array .. n] to record the integers in.O (n) Time to find the missing integer. However, in this case, we cannot use a single operation to access a complete integer in A, because the elements in a are represented in binary. The only operation we can useThe operation is to take the J-bits of a [I] and the time taken is constant. Proof: if the only way to access the information in array A Is

It took two days to complete the 2-3-4 tree summary. Program -- Inserts a 2-3-4 tree. The main reason for this long time is that many detours have been taken and some common-sense errors have been made. To prevent such errors from being repeated, this note is used to deepen your impression. First of all, I did not und

Now, And most Android developers use the SDK version of 2.x when they develop the Android app. In order to be compatible with 2.x mobile phone this is understandable, but the most troubling is the 2.x version of the theme is in too ugly, this is the launch of Android just consider the practical, and did not take into account the aesthetics, and now up to the oper

Use the for and while loops to calculate the value of e [e = 1 + 1/1! + 1/2! + 1/3! + 1/4! + 1/5! +... + 1/n!], While /* Write a program and calculate the value of e according to the following formula. Two calculation methods are required: 1) for loop, calculation of the first 50 items 2) while loop until the value of the last item is less than 10-4e = 1 + 1/1! +

Format characters have the following meaning; the conversion between C and Python values shoshould be obvious given their types. the 'standard size' column refers to the size of the packed value in bytes when using Standard size; that is, when the format string starts with one','>','! 'Or'='. When using native size, the size of the packed value is platform-dependent. All content of this blog is original, if reproduced please indicate the source http://blog.csdn.net/myhaspl/