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What is the largest TCP/IP network port number allowable for IPv4?
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@JessieArr Most IP stacks use a tuple of Source IP address, Source port, Destination IP address and Destination port as a unique identifier for connections. This means that a server can have many many more active connections than there are a...
Obfuscated C Code Contest 2006. Please explain sykes2.c
... the appearance of each character, and the second table (";;;====~$::199") selects the appropriate bit to display from the bitmap.
The second table
Let's start by examining the second table, int shift = ";;;====~$::199"[(i*2&8) | (i/64)];. i/64 is the line number (6 to 0) and i*2&8 is 8 if...
Find and extract a number from a string
...n(string.Empty, Regex.Matches(subjectString, @"\d+").OfType<Match>().Select(m => m.Value));
– Markus
Jul 26 '14 at 4:53
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Host 'xxx.xx.xxx.xxx' is not allowed to connect to this MySQL server
... add new privilege from phpmyadmin
Goto Privileges > Add a new User
Select Any Host for the desired username
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Equals(=) vs. LIKE
... can produce results different from the = comparison operator:
mysql> SELECT 'ä' LIKE 'ae' COLLATE latin1_german2_ci;
+-----------------------------------------+
| 'ä' LIKE 'ae' COLLATE latin1_german2_ci |
+-----------------------------------------+
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Subdomain on different host [closed]
... A records has to be setup on the dns for the domain e.g
mydomain.com has IP 123.456.789.999 and hosted with Godaddy. Now to get the sub domain
anothersite.mydomain.com
of which the site is actually on another server then
login to Godaddy and add an A record dnsimple anothersite.mydomain.com and...
How to get a date in YYYY-MM-DD format from a TSQL datetime field?
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SELECT CONVERT(char(10), GetDate(),126)
Limiting the size of the varchar chops of the hour portion that you don't want.
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企业级负载平衡简介 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...浏览器将首先查找本地的DNS缓存是否拥有该域名所对应的IP地址。如果有，那么浏览器将尝试直接使用该IP地址访问该网站的内容。如果本地DNS缓存中没有该域名所对应的IP地址，那么它将向DNS发送一个请求，以获得该域名所对应...
Do htmlspecialchars and mysql_real_escape_string keep my PHP code safe from injection?
...nerable to certain attack vectors.
Imagine the following SQL:
$result = "SELECT fields FROM table WHERE id = ".mysql_real_escape_string($_POST['id']);
You should be able to see that this is vulnerable to exploit.
Imagine the id parameter contained the common attack vector:
1 OR 1=1
There's no...
Binding IIS Express to an IP Address [duplicate]
...twork. Out of the box it can do localhost but I am trying to bind it to an IP address.
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