TCP/IP 这个主题很多文章比较陈旧，且以讹传讹的东西太多，所以本文作者结合了理论和实践去写，旨在通过一系列实验帮助读者深入理解 TCP 连接的建立过程。 写在前面 通信媒介可能会丢失或者改变被传递的消息，在这类有损通信信道上提供可靠通信协议的 ...

Security practitioners for decades have advised people to limit DNS queries against their DNS servers to only use UDP port 53. The reality is that DNS queries can also use TCP port 53 if UDP port 53 ...

I ran a tcp nmap scan on my Win2k machine, and it shows port 1025 open. It's not blackjack, and if I disable it I lose Internet access View image ...

Data packets travel to and from numbered network ports associated with particular IP addresses and endpoints, using the TCP or UDP transport layer protocols. All ports are potentially at risk of ...

I'm looking for what I believed must be a very simple piece of software, but after hours of googling I still haven't found something usable. I need software, preferably running as a service, that can ...

A significant increase this weekend in TCP traffic with source port zero detected could be part of reconnaissance efforts in preparation for more serious attacks, according to security researchers ...

See what process is using a TCP port in Windows Server 2008 Your email has been sent Windows administrators sometimes have to track down network traffic or errant processes and then match that to ...

An increase in sniffing activity on a communications port associated with a software vulnerability disclosed by Microsoft Corp. this month may be the signal of an impending attack designed to exploit ...

Port Query (PortQry.exe) is a command-line utility in the Windows operating system that you can use to help troubleshoot TCP/IP connectivity issues. The tool reports the port status of TCP and UDP ...

You can connect multiple printers to a single computer in your office and use them to print business documents in various formats. Your computer communicates with each printer on your office network ...