CCNA Question of the Week

In this weekly series, Jill Liles posts questions and answers to help readers prepare for the CCNA exam.

With RSTP, which two port roles are included in the active topology?

  1. root and alternate
  2. root and designated
  3. alternate and backup
  4. designated and backup


The correct answer is B.

In RSTP, root and designated ports are the only ones forwarding and therefore the only ones included in the active topology. All ports on the root bridge are designated ports. Each non-root bridge has a root port. Every segment has only one designated port. All other ports are not forwarding.


Related Courses:
ICND1 — Interconnecting Cisco Network Devices 1
ICND2 — Interconnecting Cisco Network Devices 2
CCNAX — CCNA Boot Camp v1.1

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