You have configured your chassis cluster to include redundancy group 1. Node 0 is configured to be the primary node for this redundancy group. You need to verify that the redundancy group failover is successful.Which command do you use to manually test the failover?（）

单项选择题Which parameters are valid SCREEN options for combating operating system probes?（）

A. syn-fin, syn-flood, and tcp-no-frag
B. syn-fin, port-scan, and tcp-no-flag
C. syn-fin, fin-no-ack, and tcp-no-frag
D. syn-fin, syn-ack-ack-proxy, and tcp-no-frag

单项选择题Host A opens a Telnet connection to Host B. Host A then opens another Telnet connection to Host B. These connections are the only communication between Host A and Host B. The security policy configuration permits both connections. How many sessions exist between Host A and Host B?（）

A.1
B.2
C.3
D.4

单项选择题You want to create an out-of-band management zone and assign the ge-0 0 0.0 interface to that zone.From the [edit] hierarchy, which command do you use to configure this assignment?（）

A. set security zones management interfaces ge-0/0/0.0
B. set zones functional-zone management interfaces ge-0/0/0.0
C. set security zones functional-zone management interfaces ge-0/0/0.0
D. set security zones functional-zone out-of-band interfaces ge-0/0/0.0

单项选择题Which statement is true about a NAT rule action of off?（）

A. The NAT action of off is only supported for destination NAT rule-sets.
B. The NAT action of off is only supported for source NAT rule-sets.
C. The NAT action of off is useful for detailed control of NAT.
D. The NAT action of off is useful for disabling NAT when a pool is exhausted

多项选择题Which two content-filtering features does FTP support?（） (Choose two.)

A. block extension list
B. block MIME type
C. protocol command list
D. notifications-options