Which type of mirroring does SPAN technology perform?
A.
Remote mirroring over Layer 2
B.
Remote mirroring over Layer 3
C.
Local mirroring over Layer 2
D.
Local mirroring over Layer 3
Explanation:
BD
You can analyze network traffic passing through ports or VLANs by using SPAN or RSPAN to send a copy of
the traffic to another port on the switch or on another switch that has been connected to a network analyzer or
other monitoring or security device.
Local SPAN supports a SPAN session entirely within one switch; all source ports or source VLANs and
destination ports are in the same switch or switch stack.
Each local SPAN session or RSPAN destination session must have a destination port (also called a monitoring
port) that receives a copy of traffic from the source ports or VLANs and sends the SPAN packets to the user,
usually a network analyzer:
+ If ingress traffic forwarding is enabled for a network security device, the destination port forwards traffic at
Layer 2.
Source: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_55_se/
configuration/guide/scg_2960/swspan.html