300-320 Question #499: Real Exam Question with Answer & Explanation

The correct answer is B: Packets per seconds. When selecting a VPN head-end device, Packets Per Second (PPS) and CPU capacity are the two most critical scaling factors. VPN operations (IPsec encryption/decryption, hashing, key exchanges) are computationally intensive, making CPU the primary bottleneck. PPS determines how man

Question

What are the most important scaling factors that need to be considered while selecting VPN head end device? (Choose two)

Options

AMemory
BPackets per seconds
CConnection speed
DCPU Limit
ENo of Tunnels

Explanation

When selecting a VPN head-end device, Packets Per Second (PPS) and CPU capacity are the two most critical scaling factors. VPN operations (IPsec encryption/decryption, hashing, key exchanges) are computationally intensive, making CPU the primary bottleneck. PPS determines how many encrypted/decrypted packets the device can handle simultaneously - a device that maxes out its PPS capability will drop traffic regardless of available bandwidth. While memory and tunnel count are relevant considerations, they are secondary to raw processing throughput in determining whether a head-end device can scale to meet demand.

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