The data transfer in a TCP/IP network is usually block-based. From a programmer’s point of view, sending data means issuing a series of “send data block” requests. On a system level, sending an ...

Transmission Control is an essential aspect of network activity and governs the behavior of many services we take for granted. When sending your emails or just browsing the web you are relying on TCP ...

Most network people understand the terrible effect delay can have on TCP sessions. TCP must pause data transfers while waiting for ACKs. The more network delay there is, the longer this pause will be.

In the past, Google has created alternatives to widely used networking protocols such as SPDY in order to deliver search results as fast as possible. Apple is now doing something similar by having ...

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 ...

Whether it’s wired or wireless, most data communications today happens by way of packets of information travelling over one or more networks. But before these networks can work together, though, they ...

In the last two newsletters (see here and here) we commented on the fact that data replication was significantly different than other data applications and that it could be negatively impacted by ...

Trying to find out if my Exchange server has been comprimsed... Since yesterday it's been sending ICMP packets out like crazy, actually filling my entire T1. Today it's sending to 65.80.164.255, which ...