When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Recently, a significant amount of time has been expended on the discussion of certain numbers.

Figuring out the amount of bandwidth a video signal requires on an IP network isn’t terribly hard, but it does require some familiarity with the underlying technologies and packet formats. Getting the ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The previous “Transition to Digital” tutorial briefly addressed Quality of Service (QoS) and its ...

In Part 1 of this article, we talked about security issues related to sending and receiving IP packets and the function of IP Security, or IPSec. We also discussed different levels of security and ...

In October 1998, Cisco announced that it was acquiring Selsius, a manufacturer of packet-based phone systems. That signaled the beginning of a new era in how we think about the use of our IP networks.

The current IP address scheme of 32-bit words is fast becoming inadequate. It would appear that 2 32 = 4 294 967 296 combinations of addresses should be enough for everybody, but in practice this is ...

In the last issue we started following a packet's journey from the wire up to the higher levels of network stack processing. We left the packet at the end of layer 3 processing, where IP has ...

Service providers are presently seeking to increase their profits through low cost deployment of voice and leased line services over more efficient Ethernet and IP infrastructures. At the same time ...

Despite the industry attention it has received, voice-over-IP (VoIP) is not the only way to send voice across a packet-switched network. In fact, it may not even be the best approach for some ...