As with any network and internet-capable computing system, many of Apple's services and programs require access to the internet and/or local network using TCP and UDP ports to function properly. When ...

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 ...

Netstat, the TCP/IP networking utility, has a simple set of options and identifies a computer’s listening ports, along with incoming and outgoing network connections. This data can be very helpful if ...

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 ...

The history of TCP port 80 started a long time ago when the IANA assigned TCP port 80 for HTTP activity and TCP port 443 for secure HTTP (HTTPS). HTTP was designed as a protocol to transport requests ...

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 ...

System and network troubleshooting often involves checking and obtaining information about ports to ensure functionality and determine the source of problems. Learn handy tips to help keep systems ...

I have written some Monte Carlo simulation code that's designed for big parallel simulations, and it communicates over TCP/IP. I was running some quick tests with it, and decided to use port 1066 for ...

Port forwarding is a solution to a problem that many gamers know all too well: You attempt to join a friend in an online match but can’t because your connection to the gaming network is limited, ...

I like to think of the transport layer as the layer of the OSI Model that enables more interesting traffic. While we network engineers may love a lot of the simpler uses of the IP protocol and ...