E

The syntax to turn on PoE on a CatOS-based switch is set port inline power mod/port auto.

B, C, and D

Cisco Catalyst switches have the ability to provide PoE (both 802.3af and the Cisco prestandard) and handle CoS tagging on incoming packets (both on the data and voice VLANs).

A, B, and D

To support dual VLANs on a single port, you must configure the port with voice and access VLANs and use the trunk tagging mechanism (802.1Q) to mark the packets. Of course, the IP Phone must also have an internal switch to support an additional device (such as a PC) connection.

A, C, and E

Cisco IP Phones can be powered through wall power (using an additional power brick sold separately from the IP Phone), Cisco prestandard PoE, or the Cisco Power Patch Panel (midspan power injection). All Cisco IP Phones do not yet support the IEEE 802.3af PoE standard. This support will be added as newer models are released.

D

802.3af is the IEEE industry standard for PoE.

C

The Catalyst 3750 uses the NativeIOS operating system. The set-based syntax only applies to the CatOS. In addition, there is no "on" mechanism for inline power, rather, only an autodetect mechanism exists.

B and C

Dual VLAN configurations can only be accomplished using the 802.1Q tagging mechanism. When deploying this configuration on a 6500 series switch running the CatOS, you must use the auxiliary VLAN configurations. Voice VLAN configurations apply to the NativeIOS.

D

When you enable the auxiliary VLAN on a CatOS switch, the tagging mechanism handles the trunk configuration for you. No further configuration is needed.

C

A Cisco IP Phone tags all voice traffic using a CoS marking of 5. This is the highest user-defined marking Cisco recommends.

B

Attached devices are considered untrusted (by default) by a Cisco IP Phone. This means that the Cisco IP Phone will mark traffic with a CoS value of 0, unless otherwise specified by the administrator.