Question 1

The RSTP protocol provides a variety of protection functions, such as when the edge port is configured as a protection state, the edge port receives the BPDU packet processing method;

Options :

A : Directly discard the BPDU packet

B : Close the port

C : After parsing the BPDU message, the relevant information is obtained

D : Forward BPDU packets as required

Answer: B

Question 2

Which of the following attacks are DoS (Denial of servioe) attacks?( Multiple choice question)

Options :

A : Single packet attack

B : Source P address spoofing attack

C : Man-in-the-middle attack

D : Flood Attack

Answer: A,D

Question 3

The following statement about IPSec VPN is correct ?qo

Options :

A : Two routers establish an IPSec VPN in brutal mode, so that the two devices can interact with a minimum of 4 messages to establish a tunnel.

B : Brutal mode can support NAT traversal, while main mode does not support NAT traversal.

C :

The two routers can establish OSPF neighbor relations and exchange intranet routes through the IPSec

VPN tunnel

D :

The two routers establish IPSecVPN in main mode, and from the 5th packet (included), the payload's

data will be encrypted.

Answer: D

Question 4

After you divide an interface of the firewall into the Untrust security domain, the interface belongs to the

Untrust zone and no longer belongs to the Local zone.

Options :

A : TRUE

B : FALSE

Answer: B

Question 5

NSF (Non-StoppingForwarding) and non-stop circuits are transmitted NSR (Non-Stopping Routing) are two

highly reliable solutions, and the following statement is correct

Options :

A :

After NSR enablement, if the business batch backup has not yet ended, a master board failure occurs,

the NSR cannot be completed

B : NSR backers require the ability to support NSR through specific message negotiation

C : After NSF is enabled, the router is switched back, and the routing table and forwarding table remain unchanged, so traffic is not lost during grf time

D : NSF routers do not need to negotiate the ability to support NSF through specific messages

Answer: A

Free H12-891_V1.0 Mock Exam – Practice Online Confidently

Buying Options: