单项选择题

When configuring SSH， which is the Cisco minimum recommended modulus value？（）

A.2048 bits
B.1024 bits
C.256 bits
D.512 bits

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单项选择题

Which information is stored in the stateful session flow table while using a stateful firewall？（）

A.the inside private IP address and the translated inside global IP address
B.the source and destination IP addresses， port numbers，TCP sequencing information， and additional flags for each TCP or UDP connection associated with a particular session
C.the outbound and inbound access rules （ACL entries）
D.all TCP and UDP header information only

单项选择题

Which VoIP components can permit or deny a call attempt on the basis of a network’s available bandwidth？（）

A.MCU
B.Application server
C.Gateway
D.Gatekeeper

单项选择题

What is the objective of Diffie-Hellman？（）

A.used to verify the identity of the peer
B.used between the initiator and the responder to establish a basic security policy
C.used to establish a symmetric shared key via a public key exchange process
D.used for asymmetric public key encryption