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由12306.cn谈谈网站性能技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...方面。比如节省网络带宽，我们都知道网络上的MTU（最大传输单元），以态网是1500字节，光纤可以达到4000多个字节，如果你的一个网络包没有放满这个MTU，那就是在浪费网络带宽，因为网卡的驱动程序只有一块一块地读效率才...
An existing connection was forcibly closed by the remote host
...lly means that the remote side closed the connection (usually by sending a TCP/IP RST packet). If you're working with a third-party application, the likely causes are:
You are sending malformed data to the application (which could include sending an HTTPS request to an HTTP server)
The network lin...
Does every web request send the browser cookies?
...ich is a multiplexing scheme? I.e., the requests are bundled into a single TCP connection. Of course every request is received with a copy of the cookie attached. But if the concern is lots of transmission duplication, HTTP 1.1 is in a position to optimize. Though I don't know if it actually does......
SSH to Elastic Beanstalk instance
...will lock it down to only allow ingress from a specific IP address.
SSH | tcp | 22 | 22 | 192.168.1.1/32
Configure the environment of your Elastic Beanstalk Application
If you haven't made a key pair yet, make one by clicking Key Pairs below Security Group in the ec2 tab.
In the AWS console, o...
mqtt协议加密连接，仅ca证书如何配置？ - App Inventor 2 中文网 - 清泛IT...
mqtt协议加密连接，仅ca证书如何配置？
BLE（四）嗅探工具 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...40F128 / F256，分别为128和256 KB的闪存，结合TI的低功耗蓝牙协议栈，CC2540F128 / F256形成了市场上最灵活，性价比也最高的单模式蓝牙BLE解决方案。
CC2540 USB Dongle的实物图如下，它可以配合TI的PacketSniffer软件实现对BLE无线抓包：
实...
java.net.SocketException: Connection reset
...
Connection reset simply means that a TCP RST was received. This happens when your peer receives data that it can't process, and there can be various reasons for that.
The simplest is when you close the socket, and then write more data on the output stream. By c...
Using port number in Windows host file
...80 is not occupied by another service.
You can check with netstat -a -n -p TCP | grep "LISTENING"
added the following network configuration with netsh command utility
netsh interface portproxy add v4tov4 listenport=80 listenaddress=127.65.43.21 connectport=8081 connectaddress=127.0.0.1
I can no...
Sql server默认的端口是多少？如何开启远程连接？ - 爬虫/数据库 - 清泛IT...
默认是1433，可以在配置管理器中查看：
需要开放1433端口，可以参考《Windows、Linux开放指定端口》。
另外，开启远程连接还需要启用TCP/IP，然后重启服务，步骤如下：
How can I access the MySQL command line with XAMPP for Windows?
...r default to, in
order of preference, my.cnf, $MYSQL_TCP_PORT,
/etc/services, built-in default (3306).
--progress-reports Get progress reports for long running commands (like
ALTER TABLE)
(Defaults to on; use ...