单项选择题
A. Telnet is not being permitted by self policy.
B. Telnet is not being permitted by security policy.
C. Telnet is not allowed because it is not considered secure.
D. Telnet is not enabled as a host-inbound service on the zone.
多项选择题 Which two statements regarding asymmetric key encryption are true?（） (Choose two.)
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 flows exist between Host A and Host B? （）
单项选择题 Using a policy with the policy-rematch flag enabled, what happens to the existing and new sessionswhen you change the policy action from permit to deny? （）