When you enable port security on an interface that is also configured with a voice VLAN, what is the maximum number of secure MAC addresses that should be set on the port? Select the best response.
A.
No more than one secure MAC address should be set.
B.
The default will be set.
C.
The IP phone should use a dedicated port, therefore only one MAC address is needed per port.
D.
No value is needed if the switchport priority extend command is configured.
E.
No more than two secure MAC addresses should be set.
Question seems ambiguous.
Yes the Default of 1 allowed mac will be set, but the question asks for “What should be set”, which is maximum 2.
The standard voip installation consists of a phone and a PC in the field.
I suppose the rationale is that the question did not make mention of an attached PC, so allowing a single mac is the only requirement for the voip phone.
Yes, the default allow only one MAC address.
Ref: http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_19_ea1/configuration/guide/swtrafc.html
I saw only mention about 2 addresses in official documents, no where is mentioned, that we can use the default setting.
So answer E is correct as for me.
http://www.cisco.com/en/US/docs/switches/lan/catalyst2950/software/release/12.1_14_ea1/configuration/guide/swvoip.html#wp1030825
When a voice VLAN is configured on a secure port that is also configured as a sticky secure port, all addresses seen on the voice VLAN are learned as dynamic secure addresses, and all addresses seen on the access VLAN (to which the port belongs) are learned as sticky secure addresses.
from cisco site
Cisco Documentation says:
When you enable port security on an interface that is also configured with a voice VLAN, you must set the maximum allowed secure addresses on the port to AT LEAST TWO.
But answer E says: NO MORE THAN,
Perhaps that why answer B is correct.