mediumMultiple Choice
300-410 Practice Question: Configured the following: monitor session 3 type…
A network engineer configured the following:
monitor session 3 type erspan-source source interface GigabitEthernet0/0/2 rx destination erspan-id 2
ip address 10.0.0.2
origin ip address 10.0.0.1
What traffic will be mirrored?
⚠ Common exam trap
300-410 often tests SPAN/ERSPAN direction keywords, and candidates may confuse 'rx' with 'tx' or 'both'.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Only traffic received on GigabitEthernet0/0/2.
The command 'source interface GigabitEthernet0/0/2 rx' specifies that only traffic received (rx) on GigabitEthernet0/0/2 will be mirrored. The 'rx' keyword indicates ingress traffic, so only incoming packets are copied to the ERSPAN destination.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Only traffic received on GigabitEthernet0/0/2.
Why this is correct
The `rx` keyword restricts the source to ingress traffic only, so frames received on GigabitEthernet0/0/2 are copied to the ERSPAN destination. Egress traffic is excluded, satisfying the stem's mirroring constraint. Without `rx`, both directions would be captured.
- ✗
Only traffic transmitted on GigabitEthernet0/0/2.
Why it's wrong here
The rx keyword mirrors ingress traffic received on GigabitEthernet0/0/2; egress traffic is not copied. It is tempting because tx is the counterpart keyword and would be correct had the engineer wanted transmitted traffic mirrored, but the configuration explicitly states rx.
- ✗
Both received and transmitted traffic on GigabitEthernet0/0/2.
Why it's wrong here
The source command specifies the rx keyword, which mirrors only ingress traffic received on GigabitEthernet0/0/2; transmitted traffic is excluded unless both or tx is configured. It is tempting because omitting a direction keyword defaults to both, but rx was explicitly stated here.
- ✗
All traffic on the router, regardless of interface.
Why it's wrong here
The monitor session names a single source interface, GigabitEthernet0/0/2, so only that interface's traffic is copied; no router-wide capture exists. It is tempting because ERSPAN encapsulates mirrored frames for remote delivery, which can suggest broader scope, but the source command bounds it to one interface.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.