Resource Allocation and Pricing in Cloud Computing Quiz
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Questions and Answers

What is the primary concern related to tenants in traditional data centers?

  • Poor utilization
  • Communication throughput
  • Locked IP addresses (correct)
  • Lack of agility

    • Why are subnets generally assigned different IP addresses in traditional data centers?

  • To increase performance uniformity
  • To guarantee location independence (correct)
  • To ensure communication throughput
  • To maintain poor utilization

    • What is a key advantage of having a tenant's IP address that can be taken anywhere?

  • Improved communication throughput
  • Location-independent addressing (correct)
  • Guaranteed performance uniformity
  • Poor utilization prevention

    • Why is it challenging to change the IP addresses of live running services in traditional data centers?

    <p>The complexity of changing topological locators</p> Signup and view all the answers

    How do traditional data centers suffer from a lack of agility with tenants?

    <p>Locked IP addresses to topological locations</p> Signup and view all the answers

    What is a significant benefit of having tenants with IP addresses independent of location?

    <p>Location-independent addressing flexibility</p> Signup and view all the answers

    Where is the intelligence placed in a Software Defined Network (SDN)?

    <p>In a logically centralized location</p> Signup and view all the answers

    What is the goal of a logically centralized controller in a Software Defined Network?

    <p>To simplify widely distributed switching gear</p> Signup and view all the answers

    What does NOX represent in the context of Software Defined Networking (SDN)?

    <p>An early SDN controller</p> Signup and view all the answers

    What does the logically centralized controller allow building on top of it in SDN?

    <p>Software abstractions</p> Signup and view all the answers

    In SDN, what is used to identify a user's traffic and tag it with an identifier?

    <p>A VLAN tag</p> Signup and view all the answers

    What type of interface is provided for the data plane in software-defined networking architectures?

    <p>Low-level interface and programmatic interface</p> Signup and view all the answers

    What is the main goal of classifying traffic matrices into 40 categories of clusters?

    <p>To detect patterns in traffic matrices over time</p> Signup and view all the answers

    In the context of network design, what is the purpose of a Clos topology?

    <p>To provide a richly-connected backbone with non-blocking properties</p> Signup and view all the answers

    What failure characteristic was highlighted after analyzing 300K alarm tickets and 36 million error events?

    <p>0.4% of failures resolved in over one day</p> Signup and view all the answers

    What characteristic of VL2 physical topology makes it well-suited for Very Large Backbone networks?

    <p>Use of two separate address families</p> Signup and view all the answers

    Why is 'oblivious routing' used in network design based on the text provided?

    <p>To adapt to unpredictable traffic patterns efficiently</p> Signup and view all the answers

    What distinguishes the Clos topology from traditional network design approaches like VL2?

    <p>Emphasis on scale-out rather than scale-up architecture</p> Signup and view all the answers

    What is the stand-by cost of a VM at the edge node?

    <p>$0.03</p> Signup and view all the answers

    What is the computing cost of a VM at the edge node?

    <p>$0.20</p> Signup and view all the answers

    If the total number of VMs requested by the client at time slot $t=2$ is 100, how many VMs will be allocated from the private cloud?

    <p>70</p> Signup and view all the answers

    What is the unit price of an on-demand instance in the public cloud?

    <p>$3.00</p> Signup and view all the answers

    If the total number of VMs requested by the client at time slot $t=3$ is 200, how many VMs will be available at the edge node at the beginning of the fourth time slot?

    <p>180</p> Signup and view all the answers

    What is the computing cost of the private cloud?

    <p>$3.00</p> Signup and view all the answers

    What is the cost at the edge node for time slot (t = 1)?

    <p>$23.46</p> Signup and view all the answers

    For time slot (t = 2), which type of instance is used in the public cloud?

    <p>On-demand instance</p> Signup and view all the answers

    What is the cost at the edge node for time slot (t = 3)?

    <p>$19.08</p> Signup and view all the answers

    What is the objective function for the Long-Term Optimal Resource Allocation problem?

    <p>$\sum_{t=1}^T C_t^{pub}$</p> Signup and view all the answers

    How is the resource allocation problem modeled?

    <p>As a Markov Decision Process (MDP)</p> Signup and view all the answers

    For time slot (t = 3), which type of instance is used in the public cloud?

    <p>Spot instance</p> Signup and view all the answers

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