Question 1

Link aggregation is a common network technology. Which of the following are advantages of link aggregation?

Options :

A : Load balancing

B : Improved reliability

C : Increased link bandwidth

D : Route backup

Answer: A,B,C

Question 2

OSPF routers exchange Hello packets to establish neighbor relationships. The Hello packet sending modes vary by network type. On which of the following types of networks are Hello packets multicast?

Options :

A : NBMA

B : P2MP

C : P2P

D : Broadcast

Answer: C,D

Question 3

When a routing policy is used to filter routes, which of the following route prefixes will be denied by the IP prefix below?

Options :

A : 1.1.1.1/26

B : 1.1.1.2/16

C : 1.1.1.1/32

D : 1.1.1.1/24

Answer: B,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

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