A number assigned to applications and services in a TCP/IP network, such as voice and video calling, that do not require a 100% reliable delivery of packets. See UDP and TCP/IP port. THIS DEFINITION ...

What is TCP/UDP port 27? I've looked it up in IANA's list of well-known ports and it came up as nsw-fe, or more appropriately, "NSW User System FE", but just what the hell is it? I've been told it was ...

A typical User Datagram Protocol/Internet Protocol (UDP/IP) header contains 20 bytes of IP header and eight bytes of UDP header. While UDP headers contain source and destination UDP port addresses, ...

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 ...

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 ...

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 ...

Two simple filters for wireshark to analyze TCP and UDP traffic Your email has been sent Wireshark is a protocol analyser available for download. This week’s post ...

Have you ever performed surgery on data packets? There are times when that may be the best way to troubleshoot and optimize your network. This edition of the Packet Professor will get you started in ...

Until recently I used the firewall feature of Cisco IOS to protect my lan. I used ACLs to:<BR>allow UDP out on ports 53 and GT 1023;<BR>allow UDP in on ports GT 1023 from my ISP's specific DNS servers ...