Home » Cisco » 200-105 v.2 » Which three effects of using local SPAN are true?
Which three effects of using local SPAN are true? (Choose three.)
A. It doubles the load on the forwarding engine.
B. It prevents SPAN destinations from using port security.
C. It doubles internal switch traffic.
D. It reduces the supervisor engine workload by half.
E. it reduces the load on the switch fabric.
Correct Answer: ABC
Explanation/Reference:
Explanation:
To avoid disrupting traffic, do not oversubscribe any of these points in your SPAN topology. Some oversubscription and performance considerations are:
– SPAN doubles traffic internally
– SPAN adds to the traffic being processed by the switch fabric
– SPAN doubles forwarding engine load
Because SPAN destination ports drop ingress traffic, these features are incompatible with SPAN destination ports:
“” Private VLANs
“” IEEE 802.1X port-based authentication
“” Port security
Reference: https://www.cisco.com/c/en/us/td/docs/routers/7600/ios/12-2SXF/configuration/guide/swcg/span.pdf
