Question 1

Which of the following attacks is not the network layer attack?

Options :

A : IP spoofing attack

B : ICMP attack

C : Smurf attack

D : ARP spoofing attack

Answer: D

Question 2

During routine O&M, an engineer finds that theHold Timeparameters of two devices are inconsistent. In this case, which of the following situations occurs?

Options :

A : A peer relationship can be established, and the smaller Hold Time is selected after negotiation.

B : A peer relationship can be established, and the larger Hold Time is selected after negotiation.

C : No peer relationship can be established.

D : A peer relationship can be established, and the devices use their own parameter values to send messages.

Answer: A

Question 3

An enterprise network runs OSPF to implement network communication. Which of the following types of LSAs may be generated by an ABR?

Options :

A : NSSA LSA

B : AS External LSA

C : Network Summary LSA

D : ASBR Summary LSA

Answer: A,C,D

Question 4

Which of the following statements is false?

Options :

A :

If the current DR fails, the current BDR automatically becomes a new DR, and a BDR will be elected again.

B : A device with a higher router priority has a higher election priority.

C :

When a router with the highest router priority joins an OSPF network, this router will become the new DR.

D :

If two devices have the same router priority, the device with a larger router ID has a higher election priority.

Answer: C

Question 5

On an OSPF network, if a router receives an update of an LSA that exists in the local LSDB, the router updates the LSDB and floods the LSA.

Options :

A : TRUE

B : FALSE

Answer: B

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