Explanation of EIGRP Diffusing Update Algorithm (DUAL)

• Maintaining a table of loop-free paths to every destination
• DUAL saves all paths in the topology table.
• Selects lowest cost , loop free paths to each destination
• DUAL enables EIGRP routers to determine whether a path advertised by a neighbor is looped or loop-free, and allows a router running EIGRP to find alternate paths without waiting on updates from other routers.
• EIGRP employs four key technologies, including neighbor discover/recovery, Reliable Transport Protocol (RTP), Diffusing Update ALgorithm (DUAL) finite-state machine, and a modular architecture that enables support for new protocols to be easily added to an existing network.
• DUAL use AD & FD to select the best Path
• An EIGRP router receives advertisements from each neighbor that lists the advertised distance (AD) and feasible distance (FD) to a route.
• AD is the metric from the neighbor to the network. FD is the metric from this router, through the neighbor, to the network.

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Learn about EIGRP Metric

Cisco’s EIGRP uses metrics; Delay, Bandwidth, Reliability and Load. MTU is NOT used in the calculation of the metric, however the MTU is tracked through the path to find the smallest MTU.EIGRP only uses Delay and Bandwidth with Bandwidth taking precedence

• Bandwidth
• Delay
• Reliability
• Load

EIGRP Metric = 256*((K1*Bw) + (K2*Bw)/(256-Load) + (K3*Delay)*(K5/(Reliability + K4)))

The k values are constants. Their default values are: k1 = 1, k2 = 0, k3 = 1, k4 = 0, and k5 = 0. If k5 = 0

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ExplorerXP is a very fast, small, compact and innovative FREEWARE (for non - commercial use) file manager for Windows 2000/XP. Unlike the regular Windows Explorer, it displays the total size of each folder and allows you to browse multiple folders from a tabbed interface.

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With Blu-ray winning HD format war, Toshiba attempted to release an HD solution in the Qosmio G45 laptop. The laptop comes with a HD-DVD burner as well as a plethora of features to support a theater-like experience starting from the powerful speakers to the razor sharp 17-inch widescreen display Large and in charge, the Qosmio G45 comes with a black-piano finish lid that contrasts the white keyboard. Although the aesthetic design is quite impressive, picking up the laptop isnâ??t quite impressive. The laptop weighs in at a massive 10 pounds, which will either break your back or enlarge your biceps.

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