Traditional vs
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Traditional vs

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Which approach to implementing routing functionality has been the traditional approach adopted by routing vendors in their products?

  • A combination of both approaches
  • A physically separate, remote controller computing and distributing the forwarding tables to be used by each and every router
  • None of the above
  • Each router having a routing component that communicates with the routing component of other routers (correct)

    • What is the remote controller in the alternative approach shown in Figure 4.3 responsible for?

  • Communicating with the data plane components of the routers
  • Computing and distributing the forwarding tables to be used by each and every router (correct)
  • Performing forwarding only
  • None of the above

    • What is software-defined networking (SDN)?

  • A network where the controller that computes forwarding tables and interacts with routers is implemented in software (correct)
  • None of the above
  • A network where the forwarding tables are manually configured by humans
  • A network where the controller that computes forwarding tables and interacts with routers is implemented in hardware

    • Which of the following is a key difference between the routing functionality approach shown in Figure 4.2 and the approach shown in Figure 4.3?

    <p>Figure 4.2 has each router communicating with the routing component of other routers, while Figure 4.3 has a physically separate, remote controller computing and distributing forwarding tables.</p> Signup and view all the answers

    What is the control-plane approach shown in Figure 4.3 at the heart of?

    <p>Software-defined networking (SDN).</p> Signup and view all the answers

    What is a benefit of implementing a remote controller in the control-plane approach shown in Figure 4.3?

    <p>It can be implemented in a remote data center with high reliability and redundancy.</p> Signup and view all the answers

    Which term is used to refer to a device that transfers a packet from input link interface to output link interface, according to values in a packet’s header fields?

    <p>Packet switch</p> Signup and view all the answers

    In which section of the chapter will you find information about the internal hardware operations of a router?

    <p>Section 4.2</p> Signup and view all the answers

    What is the difference between link-layer switches and routers?

    <p>Link-layer switches base their forwarding decision on values in the fields of the link-layer frame, while routers base their forwarding decision on header field values in the network-layer datagram.</p> Signup and view all the answers

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