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December 11th, 2012 10:00
E20-018 Can anyone help with these two questions?
I need to figure out the math involved with calculating these two questions and its really not explained in the video ILT. Can anyone help? The actual test they change the variables around so I really need to know how to figure these out but dont know where to start. Thanks again if anyone can help..
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Megabyte1
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March 6th, 2013 21:00
Here is what I believe to be the explantion:
1.
The Total average and burst traffic is 160Gbps and 210 Gbps respectively.
Option a. Provides 160 Gbps and 60 Gbps in the access and aggregation layer.
Option b. Provides 160 Gbps and 80 Gbps in the access and aggregation layer.
Option c. 6 x 40 - 240 Gbps.
Option d. Provides 240 and 20 Gbps in the access and aggregation layer.
Option a, b and c could provide sufficient bandwidth in the access layer but only Option b provides 80 Gbps in the aggregation layer and hence I believe Option b is the right answer.
2.
The Total Bandwidth requirements is 30 Gbps per hypervisor.
Each CNA port supports 10Gbps and these are dual port CNAs. So Each CNA provides a bandwidth of 20Gbps, which does not meet our bandwidth requirements. Adding one more will satisfy Bandwidth requirements but wont satisfy redundancy.
Hence, adding two more CNAs would provide the Total bandwidth of 60Gpbs( 3 CNA x 10Gbpsx 2 port) which satisfies the bandwidth requirement 30Gbps and the required redundancy.