A customer is seeking an upgrade for their campus LAN network. Currently, the customer has
access layer switches that support 18.10/100/1000 Mbps ports and one Gigabit uplink. The
customer wants better performance in the upgrade but also wants to minimize costs.
The network architect has used the Network Traffic Analyzer (NTA) for Intelligent Management
Center (IMC) to collect information about the access layer uplinks. These are the results:
For switches on Floor1, the peak utilization is 650 Mbps on a Gigabit uplink. On most days, the
utilization peaks at about 400 Mbps. Peaks usually occur briefly.
For switches on Floo2, the peak utilization is 800 Mbps on a Gigabit Uplink. During active
periods, the utilization often remain near 800.
What is most appropriate plan for oversubscription in the new access layer? (For this question,
think only about oversubscription and not customer needs for redundancy)
A.
48 1 on floor 1 and 24 1 on floor 2
B.
24.1 on floor 1 and 4.1 on floor 2
C.
48 1 in all locations
D.
24 1 in all locations
Explanation:
A is correct
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Well i guess instead of 18 ports it should be 48 ports. if that is the case ASE is correct.
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i confused now, what is the correct answer?
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Customer wants to minimize cost too.. hence 24 port at all
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Typo: Switch has 48 ports.
Siwtch 1 needs minimum 2xaverage peak = 2x400Mbps = 800 Mbps => 1Gb Uplink
Oversubscription: 48×1000/1000 = 48
Switch 2 needs minimum 800×2 => 2Gb Uplink
Oversubscription: 48×1000/2000 = 24
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