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ZeroMQ的学习和研究（PHP代码实例） - C/C++ - 清泛网 - 专注C/C++及内核技术
...点对点连接需要显式地建立连接、销毁连接、选择协议（TCP/UDP）和处理错误等，而 ZMQ 屏蔽了这些细节，让你的网络编程更为简单。ZMQ 用于 node 与 node 间的通信，node 可以是主机或者是进程。
三、本文的目的
在集群对外提供...
What is the difference between a port and a socket?
...
Summary
A TCP socket is an endpoint instance defined by an IP address and a port in the context of either a particular TCP connection or the listening state.
A port is a virtualisation identifier defining a service endpoint (as disti...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C++内核技术
...何拓扑，才使得拓扑可映射到底层传输的一个属性，比如TCP端口。这就允许底层的网络按照商务标准规范其行为。例如，它可以测量由特定拓扑消耗的网络带宽（因此，特定的商务逻辑，比如调整大小的服务消耗的带宽与调整亮...
TCP: can two different sockets share a port?
...criminated not only by source/destination port/IP, but also by a protocol (TCP, UDP etc.), if I am not mistaken.
– Ondrej Peterka
Apr 27 '14 at 15:00
2
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Can TCP and UDP sockets use the same port?
First of all, is there any problem with using both UDP and TCP on the same server?
2 Answers
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Why am I getting “Cannot Connect to Server - A network-related or instance-specific error”?
...L to ascertain if your server is included in your network list.
Enable TCP/IP in SQL Server Configuration
When two or more SQL Servers are connected across network they do all communication using TCP/IP. The default port of SQL Server installation is 1433. This port can be changed through S...
Enable remote connections for SQL Server Express 2012
...iscovered was here:
How do I configure SQL Server Express to allow remote tcp/ip connections on port 1433?
Run SQL Server Configuration Manager.
Go to SQL Server Network Configuration > Protocols for SQLEXPRESS.
Make sure TCP/IP is enabled.
So far, so good, and entirely expected. But then:
...
9个常用iptables配置实例 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的包丢弃：
BLOCK_THIS_IP="x.x.x.x"
iptables -A INPUT -i eth0 -p tcp -s "$BLOCK_THIS_IP" -j DROP
以上命令设置将由x.x.x.x ip发往eth0网口的tcp包丢弃。
4.配置服务项
利用iptables，我们可以对日常用到的服务项进行安全管理，比如设定只能通过...
Android微信智能心跳方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...息及时性的前提下，根据网络类型自适应的找出保活信令TCP连接的尽可能大的心跳间隔，从而达到减少安卓微信因心跳引起的空中信道资源消耗，减少心跳Server的负载，以及减少部分因心跳引起的耗电。
主要方法是参考WhatsApp...
Freeing up a TCP/IP port?
...tening for http requests on port 80 (run as root or use sudo):
# fuser 80/tcp
If you want to kill them, then just add the -k option.
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