Exam 300-320 topic 1 question 99 discussion

Actual exam question from Cisco's 300-320

Question #: 99
Topic #: 1

[All 300-320 Questions]

Which option is correct when using VSS to combine two physical switches into one logical switch?

A. Both data planes forward traffic simultaneously.
B. Only one data plane forwards traffic, while the other data plane is on standby.
C. Both control planes forward traffic simultaneously.
D. Control planes are combined into one virtual control plane.

Show Suggested Answer

Suggested Answer: D 🗳️

by Sergio at Nov. 17, 2019, 3:14 a.m.

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gastonreppeto77

5 years, 7 months ago

1 Control Plane and 2 Data Planes https://www.ciscolive.com/c/dam/r/ciscolive/emea/docs/2015/pdf/TECCRS-2404-part4.pdf https://www.cisco.com/c/dam/global/da_dk/assets/docs/presentations/VSS_0109.pdf

upvoted 1 times

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I think the correct answer should be A. In VSS there is no concept of virtual control place, there is the active chassis and the standby: "The VSS active supervisor engine controls both chassis of the VSS. The VSS active supervisor engine runs the Layer 2 and Layer 3 control protocols and manages the switching modules on both chassis." For the data plane, "The VSS active and VSS standby chassis both perform data traffic forwarding" and "the VSS standby chassis is actively forwarding traffic" .

upvoted 4 times

ek2442

5 years, 4 months ago

Agree, there is only standby control plane.

upvoted 2 times

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