单项选择题

Which statement is true when ICMP echo and echo-reply are disabled on edge devices？（）

A.Pings are allowed only to specific devices.
B.CDP information is not exchanged.
C.Port scans can no longer be run.
D.Some network diagnostic data is lost.
E.Wireless devices need to be physically connected to the edge device.
F.OSPF routing needs the command ip ospf network non-broadcast enabled.

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多项选择题

What are the four fields in an MPLS label？（）

A.version
B.experimental
C.label
D.protocol
E.TTL
F.bottom-of-stack indicato

多项选择题

Which three statements are true when configuring Cisco IOS Firewall features using the SDM？（）

A.A custom application security policy can be configured in the Advanced Firewall Security Configuration dialog box.
B.An optional DMZ interface can be specified in the Advanced Firewall Interface Configuration dialog box.
C.Custom application policies for e-mail， instant messaging， HTTP， and peer-to-peer services can be created using the Intermediate Firewall wizard.
D.Only the outside （untrusted） interface is specified in the Basic Firewall Interface Configuration dialog box.
E.The outside interface that SDM can be launched from is configured in the Configuring Firewall for Remote Access dialog box.
F.The SDM provides a basic， intermediate， and advanced firewall wizard.

单项选择题

Which form of DSL technology is typically used as a replacement for T1 lines？（）

A.VDSL
B.HDSL
C.ADSL
D.SDSL