单选题Which one of the following is NOT a supported IKE attribute？（）APFS group.BEncryption algorithm.CHashing Algorithm.DAuthenticationmethod.ELifetime duration.

A. The job will be dropped automatically if the value of the AUTO_DROP attribute is TRUE

B. The job will only be disabled if the value of the AUTO_DROP attribute is FALSE

C. The STATE attribute of the job will be set to COMPLETED if the value of the AUTO_DROP attribute is FALSE

D. All objects referenced by the job will be dropped if the value of the AUTO_DROP attribute is TRUE and the value of the CASCADE attribute is TRUE

E. The STATE column of the job table will be set to COMPLETED for the job

A.It must have the UNIQUE attribute.

B.It cannot be created explicitly by the user.

C.It must have the UNIQUE and CLUSTER attributes.

D.It must have the UNIQUE WHERE NOT NULL attribute.

Which one of the following is not an acquisition method?

A advertising

B invitation

C negotiation

D purchase

E all are acquisition methods

A. There are five phases of IKE negotiation.

B. There are two phases of IKE negotiation.

C. IPsec VPN tunnels are not supported on SRX Series devices.

D. IPsec VPNs require a tunnel PIC in SRX Series devices.

Which of the following conditions will make a relation that is in first normal form. to be in second normal form?

Ⅰ.every non-key attribute is functionally dependent on the full set of primary key attributes.

Ⅱ.no non-key attributes exist in the relation.

Ⅲ.the primary key consists of only one attribute.

A．Ⅰ only

B．Ⅰ and Ⅱ only

C．Ⅰ and Ⅲ only

D．any of them