Home » Cisco » 300-115 » What feature allows the administrator to put phones into a separate logical network from the data network while keeping both in the same physical network?
What feature allows the administrator to put phones into a separate logical network from the data network while keeping both in the same physical network?
A. auxiliary VLANs
B. queuing
C. 802.1Q
D. marking
Correct Answer: A
Explanation/Reference:
Answer:
Auxiliary VLANs allows the data and voice traffic to use the same physical topology but remain logically separate. The information the phones need regarding this voice VLAN is provided by the switch. Auxiliary VLANs allows IP phones to be automatically placed into a separate VLAN from data traffic.
Queuing is the process of placing traffic in appropriate queues depending on the class of traffic.
Marking is the process of setting the CoS, IP precedence, or DSCP of a packet to a specific value that will provide appropriate QoS throughout the network.
802.1Q is a trunking protocol used to allow traffic from multiple VLANs to pass through a single link and still be logically separate.
Objective:
Layer 2 Technologies Sub-Objective:
Configure and verify VLANs
References:
Cisco > Catalyst 4500 Series Software Configuration Guide, 8.1 > Configuring VLANs > Configuring Auxiliary VLANs
