Networking

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Using the ‘ping’ command

Posted by Dave W
July 31, 2008

Ping verifies IP-level connectivity to another TCP/IP computer by sending Internet Control Message Protocol (ICMP) Echo Request messages. The receipt of corresponding Echo Reply messages are displayed, along with round-trip times. Ping is the primary TCP/IP command used to troubleshoot connectivity, reachability, and name resolution.
Examples of Ping
Windows
ping google.com
Pinging google.com [64.223.167.99] with 32 bytes of data:
Reply from [...]

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CUDOS for Aussie Chip team

Posted by Dave W
July 10, 2008

Australian research scientists have made a radical breakthrough that could dramatically increase the speed of the optical networks at the core of the internet.
The Sydney University based Centre for Ultra-high bandwidth Devices for Optical Systems (CUDOS) team, led by Ben Eggleton, has created a switch embedded in a silicon chip. The chip uses scratches on [...]

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The Open System Interconnection (OSI) Model

Posted by Dave W
March 27, 2008

The Open System Interconnection (OSI) reference model describes how information from a software application in one computer moves through a network medium to a software application in another computer. The OSI reference model is a conceptual model composed of seven layers, each specifying particular network functions.
The model was developed by the International Organization for Standardization [...]