Question 1

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

Question 2

HW users are transferring a very large number of files via TFTP. What protocol does TFTP rely on for transmission?

Options :

A : ICMP and UDP

B : IP ?TCP

C : UDP

D : NFS

E : FTP

Answer: C

Question 3

As shown in the following figure, R1 and R2 establish a neighbor relationship with LeveL2, and the key

configuration is as follows, so is the following route entry for R2 correct?

Options :

A : 0::/64 The router will appear in the IP routing table

B : 2022::/64 Routers appear in the IP routing table

C : 2019::/64 Routers appear in the IP routing table

D : 2021::/64 Routers appear in the IP routing table

Answer: A,B,C

Question 4

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 5

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