单项选择题

Why is STP required when VLANs span access layer switches？（）

A.to ensure a loop-free topology
B.to protect against user-side loops
C.in order to support business applications
D.because of the risk of lost connectivity without STP
E.for the most deterministic and highly available network topology

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相关考题

单项选择题

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

A.19 dBm
B.7 dBm
C.10 dBm
D.6 dBm
E.5 dbm to 10 dBm

单项选择题

What is a virtual firewall？（）

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

In which two locations in an enterprise network can an IPS sensor be placed？（）

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