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An application is hosted on a three-node cluster in which each server has identical compute and network performance specifications. A fourth node is scheduled to be added to the cluster with three times the performance as any one of the preexisting nodes. The network architect wants to ensure that the new node gets the same approximate number of requests as all of the others combined. Which of the following load-balancing methodologies should the network architect recommend?
Answer : D
Assign each of the three original nodes a weight of 1 and the new high-performance node a weight of 3. With weighted balancing, the new node will receive 3 / (1 + 1 + 1 + 3) = 50% of traffic - equal to the combined load on the other three.
A network architect is designing a new network for a rural hospital system. Given the following requirements:
* Highly available
* Consistent data transmission
* Resilient to simultaneous failures
Which of the following topologies should the architect use?
Answer : D
A full-mesh topology provides multiple redundant, direct paths between every site, eliminating single points of failure, ensuring consistent transmission even if one or more links fail, and maximizing overall availability.
A SaaS company's new service currently is being provided through four servers. The company's end users are having connection issues, which is affecting about 25% of the connections. Which of the following is most likely the root cause of this issue?
Answer : A
With simple round-robin DNS distributing 25% of requests to each of four servers, a single server outage directly causes exactly 25% of connections to fail, matching the reported impact.
A network architect must design a new branch network that meets the following requirements:
* No single point of failure
* Clients cannot be impacted by changes to the underlying medium
* Clients must be able to communicate directly to preserve bandwidth
Which of the following network topologies should the architect use?
Answer : B
A full-mesh topology gives every node redundant paths to every other node, eliminating any single point of failure, and lets clients communicate directly over the optimal link without depending on an intermediate hub or core.
A cafe uses a tablet-based point-of-sale system. Customers are complaining that their food is taking too long to arrive. During an investigation, the following is noticed:
Every kitchen printer did not print the orders.
Payments are processing correctly.
The cloud-based system has record of the orders.
This issue occurred when the cafe was busy.
Which of the following is the best way to mitigate this issue?
Answer : B
By dedicating a separate Wi-Fi access point to the printers, you isolate their traffic from the customer-facing tablets. This prevents congestion during busy periods, ensuring orders reliably print even when the main network is under heavy load.
