In a VoWLAN deployment， what is the recommended separation between cells with the same channel？（）

单项选择题Whatisavirtualfirewall？（）

A.another name for a firewall deployed in routed mode
B.another name for a firewall deployed in transparent mode
C.a separation of multiple firewall security contexts on a single firewall
D.a firewall that， when deployed in routed mode， can support up to 1000 VLANs per context
E.a firewall that has multiple contexts， all of which share the same policies （such as NAT and ACLs）

多项选择题InwhichtwolocationsinanenterprisenetworkcananIPSsensorbeplaced？（）

A.bridging VLANs on two switches
B.bridging two VLANs on one switch
C.between two Layer 2 devices with trunking
D.between two Layer 2 devices without trunking
E.between a Layer 2 device and a Layer 3 device with trunking

单项选择题Inbasee-Commercemoduledesigns，whereshouldfirewallperimetersbeplaced？（）

A.core layer
B.Internet boundary
C.aggregation layer
D.aggregation and core layers
E.access and aggregation layers

多项选择题WhichtwoofthesearecharacteristicsofanIDSsensor？（）

A.passively listens to network traffic
B.is an active device in the traffic path
C.has a permissive interface that is used to monitor networks
D.traffic arrives on one IDS interface and exits on another
E.has a promiscuous interface that is used to monitor the network

多项选择题Users of a site-to-site VPN are reporting performance problems. The VPN connection employs IPSec and GRE and traverses several Ethernet segments. The VPN packets are being fragmented as they traverse the links. What would be two methods to overcome this problem?（）

A. Employ path MTU discovery.
B. Set the MTU higher than 1500 bytes.
C. Turn off pre-fragmentation for IPSec.
D. Set the MTU value to 1400 bytes.