Which statement describes the result of configuring SPAN on a Cisco device?

Which statement describes the result of configuring SPAN on a Cisco device?
A . SPAN doubles traffic internally.
B . SPAN halves the capacity of the source port
C . SPAN blocks for normal use on one additional port for each configured source port.
D . If not carefully planned, SPAN can lead to loops between source and destination ports.

Answer: C

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  1. 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
    • The supervisor engine handles the entire load imposed by egress SPAN (also called transmit SPAN).

    https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/span.pdf

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