多项选择题
A. The same key is used for encryption and decryption.
B. It is commonly used to create digital certificate signatures.
C. It uses two keys: one for encryption and a different key for decryption.
D. An attacker can decrypt data if the attacker captures the key used for encryption.
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? （）
多项选择题 In JUNOS software with enhanced services, which three packet elements are inspected to determineif a session already exists? （）(Choose three.)