network cisco ccna gns3 certification arteq

network cisco ccna gns3 certification arteq
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Saturday, October 27, 2012

quote(s) of the day... multicast...

from russ white,  eigrp for ip...

Multicast is more efficient than broadcast because the packets can be filtered by most network interface chips rather than being passed up to the IP layer to be sorted.

Updates and queries are sent as multicast packets, and the receiving router always acknowledges their receipt, using a unicast packet. 

How long will a router wait before starting the recovery mechanism? Each time it sends out a multicast packet that must be reliably delivered, an EIGRP process will wait until the RTO (retransmission timeout) period has passed before beginning a recovery action. This period is calculated from the SRTT (smooth round-trip time), which is calculated as the amount of time taken in the past for each peer on an interface to respond.

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