Archive for March, 2011

Creating Virtual Machines using Xen Hypervisor

March 28th, 2011 No comments

These YouTube Videos show how simple it is to create Virtualized and Para-Virtualised Guest Operating Systems using Xen Hypervisor Read more…

Categories: linux Tags:

Using TCP Flags to filter 3-Way Handshake using TCPDUMP / Wireshark

March 18th, 2011 No comments

Matching TCP traffic with particular flag combinations can be a useful way of examining TCP conversations.  Refer to the TCP State Machine to understand the context of these flags: Read more…

Categories: linux Tags: ,

Hyperthreading Technology

March 18th, 2011 No comments

Modern processors can only handle one instruction from one program at any given point in time. Each instruction that is sent to the processor is called a thread. Even though it seems as if you’re multitasking with your computer (running more then one program at a time) you’re really not . Read more…

Categories: Computer Architecture Tags:

TCP Options and Riverbed WAN Acceleration Appliances

March 14th, 2011 No comments

Normal TCP options are Type 0 (End of Option List), 1 (No-Operation), 2 (Maximum Segment Size, len 4), 3 (WSOPT – Window Scale, len 3), 4 (SACK Permitted, len 2), 5 (SACK, len N), and 8 (TSOPT – Time Stamp Option, len 10). Read more…