350-401 · Question #288
Refer to the exhibit. An engineer must configure a SPAN session. What is the effect of the configuration?
The correct answer is C. Traffic received on VLANs 10, 11, and 12 is copied and sent to Interface g0/1.. The configuration copies all received traffic on VLANs 10, 11, and 12 and sends it to interface g0/1 for monitoring.
Question
Refer to the exhibit. An engineer must configure a SPAN session. What is the effect of the configuration?
Options
- ATraffic sent on VLANs 10, 11, and 12 is copied and sent to interface g0/1.
- BTraffic sent on VLANs 10 and 12 only is copied and sent to interface g0/1.
- CTraffic received on VLANs 10, 11, and 12 is copied and sent to Interface g0/1.
- DTraffic received on VLANs 10 and 12 only is copied and sent to interface g0/1.
How the community answered
(21 responses)- A5% (1)
- B10% (2)
- C86% (18)
Why each option
The configuration copies all received traffic on VLANs 10, 11, and 12 and sends it to interface g0/1 for monitoring.
The `rx` keyword in the source configuration explicitly specifies only received (ingress) traffic, not sent (egress) traffic.
The `vlan 10,11,12` command includes all three VLANs, not just 10 and 12.
The `monitor session 1 source vlan 10,11,12 rx` command explicitly configures VLANs 10, 11, and 12 as source VLANs and specifies that only received (`rx`) traffic on these VLANs should be mirrored. This ingress traffic from the specified VLANs is then sent to the `destination interface g0/1` for analysis.
While it correctly identifies received traffic, it incorrectly excludes VLAN 11 from the source list.
Concept tested: Cisco SPAN source VLAN and direction configuration
Source: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12-2_44_se/configuration/guide/scg/swspan.html
Topics
Community Discussion
No community discussion yet for this question.