IP protocol 51 for Authentication Header traffic (not always used), and IP protocol 50 for the "encapsulated data itself. Again, the only "forwardable" item here is UDP port 500, which is also shown programmed in Figure 2 to the same LAN client machine - protocols...

setup is also different for VoIP, with the specifics depending on the VoIP protocol being used. For the home and small office VoIP applications that I'll be focusing on, the two most often encountered protocols are H.323 and SIP (Session Initiation Protocol)....

on the basis of IAX's higher efficiency and ability to easily traverse NAT firewalls. But even he bows to the dominance of other protocols since his Asterisk open source VoIP PBX supports IAX, SIP, MGCP, Skinny (SCCP), and H.323 VoIP protocols. But since Spencer...

of instant messaging (IM) and peer-to-peer (P2P) programs and protocols. Moreover, the 2930n supports voice and streaming media, including Session Initiation Protocol (SIP), Real-Time Protocol (RTP) and Real-Time Control Protocol (RTCP) for VoIP and video conferencing....

from server to player. These servers use protocols such as RTP and RTCP that are built on the UDP protocol. The conventional wisdom on these two protocols is that TCP/IP is more robust than UDP because TCP incorporates mechanisms to ensure that data arrives...

to run an IMAP client in Outlook and to purge the messages there. The IMAP client connects to my Exchange server email. I also connect directly to the Exchange server using MAPI protocols, so I have two instances of an Exchange connection in Outlook. Once I...

a VPN connection from one remote computer into your home's LAN, you'd best read the disclaimer that appears a few times in NETGEAR's User Guide: Note: The FVS318 VPN Firewall uses industry standard VPN protocols. However, due to variations in how manufacturers...

features. Tip: "Port" in this case, refers to a logical communication connection, not a physical socket. You can think of ports as channels, with certain protocols using particular channels. An example is that the HTTP protocol used for WWW traffic uses...

One thing I didn't see was any support for the standard UPnP protocol that many home audio/video devices use. This would have been a nice feature that would allow interoperability with other manufacture's devices. But since the protocol used is open, maybe...