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java.net.ConnectException: Connection refused
...
This exception means that there is no service listening on the IP/port you are trying to connect to:
You are trying to connect to the wrong IP/Host or port.
You have not started your server.
Your server is not listening for connections.
On Windows servers, the listen backlog queue is f...
Linux command to translate DomainName to IP [closed]
Is there any Linux command to translate domain name to IP?
2 Answers
2
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std::string的截取字符串的方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
std::string的截取字符串的方法例如截取ip:port，代码如下：std::string ip("127.0.0.1:8888");int index = ip.find_last_of(':'); ipip.substr(0, index)....例如截取ip:port，代码如下：
std::string ip("127.0.0.1:8888");
int index = ip.find_last_of(':');
//ip
ip.substr(0, in...
Checking network connection
...or as err:
return False
Currently, 216.58.192.142 is one of the IP addresses for google.com. Change http://216.58.192.142 to whatever site can be expected to respond quickly.
This fixed IP will not map to google.com forever. So this code is
not robust -- it will need constant maintenanc...
Possible reasons for timeout when trying to access EC2 instance
...he same problem, and the solution ended up being adding my
local machine's IP to the list of inbound rules in the active security
group. In the inbound dialog below, enter 22 in the port range, your local IP/32 in the source field, and leave 'custom tcp rule' in the dropdown.
...
What do people find difficult about C pointers? [closed]
...started working with them, the biggest problem I had was the syntax.
int* ip;
int * ip;
int *ip;
are all the same.
but:
int* ip1, ip2; //second one isn't a pointer!
int *ip1, *ip2;
Why? because the "pointer" part of the declaration belongs to the variable, and not the type.
And then derefe...
How can I list ALL DNS records?
... Oct 11 '13 at 18:30
denis phillipsdenis phillips
11.7k55 gold badges3030 silver badges4747 bronze badges
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进程间通信（IPC）的几种方式 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的效率太低了，而人们对进程间通信的要求是要有一定的实时性。
进程间通信主要包括管道, 系统IPC(包括消息队列,信号量,共享存储), SOCKET.
管道包括三种:1)普通管道PIPE, 通常有种限制,一是半双工,只能单向传输;二是只能在父...
工程师每周体验2G网 Facebook何用意？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...发了开源的网络接入服务系统，让Facebook的app能识别用户实时的联网速度。今后，Facebook还会有针对性地展示不同的News Feed报道，例如在网速超慢的时候优先更新状态和相关链接，其次才是显示视频和图片，而且不再同时下载多...
灾难恢复RTO 与 RPO - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...新程度可以是上一周的备份数据，也可以是上一次交易的实时数据。
选择标准
对灾难恢复而言， RTO 与 RPO 哪个衡量指标更合适呢？
在考虑采用哪个指标之前，IT 人首先要弄清楚一个基本概念，企业的容灾系统预防的是...