Verified & Latest H12-821_V1.0-ENU Dump Q&As with Correct Answers
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NEW QUESTION # 616
Since VRRP protocol packets are encapsulated in IP packets, which of the following is the IP protocol number that identifies the upper layer protocol as VRRP in the IP packet header?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 617
The correct description about the prefix list is? (Multiple choice)
- A. The prefix list can be used for packet filtering
- B. The prefix list cannot be used for packet filtering
- C. The prefix list is used to filter IP prefixes, and cannot match the prefix number and prefix length at the same time
- D. The prefix list is used to filter the IP prefix, which can match the prefix number and prefix length at the same time
Answer: B,D
NEW QUESTION # 618
Which of the following descriptions of the BFD session establishment method is incorrect?
- A. Static configuration of a BFD session refers to manually configuring BFD session parameters through the command line, including local identifiers, remote identifiers, etc.
- B. The system distinguishes between static BFD sessions and dynamic BFD sessions by configuring local and remote identifiers.
- C. When dynamically establishing a BFD session, the system will dynamically allocate a local identifier.
- D. When detecting a network that uses static routing to achieve Layer 3 interoperability, BFD sessions can only be established dynamically.
Answer: D
NEW QUESTION # 619
Which of the following descriptions of the NSSA area is wrong?
- A. The ABR in the NSSA area will automatically inject a default route into the area, which is described by type 7 LSA
- B. The NSSA area can import external routes without learning external routes from other areas of the 0SPF network
- C. Type 3 LSAs are not allowed inside the NSSA area, nor are Type 4 and Type 5 LSAs allowed inside the area.
- D. The ABR in the NSSA area will convert Type 7 LSA into Type 5 LSA, and inject the LSA into the backbone area, thereby flooding the entire OSPF domain
Answer: C
NEW QUESTION # 620
In OSPF broadcast or NBMA network types, devices with a large DR Priority may not necessarily become DR.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION # 621
In the OSPF routing protocol, the asbr-summary command can be followed by the not-advertise parameter, which means not to advertise the aggregated route.
- A. False
- B. True
Answer: B
NEW QUESTION # 622
The session-based state inspection firewall has different processing procedures for the first packet and subsequent packets. Which of the following description is correct? (Multiple choice)
- A. When the packet arrives at the firewall, it will search the session table. If there is no match, the firewall will execute the first packet processing process
- B. When the status inspection mechanism is turned on, when the firewall processes TCP packets, only SYN packets can establish a session
- C. When the packet arrives at the firewall, it will look up the session table, and if it matches, the firewall will execute the subsequent packet processing process
- D. When the status inspection mechanism is turned on, subsequent packages also need to be checked for security policies
Answer: A,B,C
NEW QUESTION # 623
OSPF supports both area authentication and interface authentication. If these two authentication methods are configured at the same time, interface authentication is better than area authentication.
- A. False
- B. True
Answer: B
NEW QUESTION # 624
In the VRP system, the prefix list (ip ip-prefix) can be called by which of the following tools? (Multiple choice)
- A. Routing policy (route-policy)
- B. Traffic-Policy
- C. Filter-Policy
- D. Policy routing (policy-based-route)
Answer: A,C,D
NEW QUESTION # 625
What are the three ways of sending IPV4 packets? (Multiple choice)
- A. Anycast _
- B. broadcasting
- C. Unicast
- D. Multicast
Answer: B,C,D
NEW QUESTION # 626
Which of the following statements about the OSPF protocol is wrong?
- A. OSPF supports load balancing for equal-cost routes
- B. OSPF packets are encapsulated in IP packets and can be sent in the form of unicast or multicast
- C. OSPF is a link state based exterior gateway protocol
- D. The OSPF protocol supports area division
Answer: C
NEW QUESTION # 627
RSTP provides different protection functions in different scenarios. Which of the following is wrong?
- A. Start the designated port of root protection. When the port receives a better RSTBPDU, the port will enter the Discarding state and no longer forward packets. If the port does not receive a better RST BPDU within a period of time, it will automatically return to the normal Forwarding state
- B. After the anti-TC-BPDU packet attack function is enabled, the number of times the switching device processes TC BPDU packets in a unit time can be configured
- C. After the BPDU protection function is enabled on the switching device, if the edge port receives the RST BPDU, the edge port will be set as a non-edge port, and the spanning tree calculation will be performed again
- D. The designated port with root protection function enabled, its port role can only be maintained as the designated port
Answer: C
NEW QUESTION # 628
As shown in the figure, R1 and R2 have configured the local sending time interval, the local receiving time interval and the local BFD detection multiple in BFD. Now R1 and R2 are detected using query mode, so what is the actual detection time of R1?
- A. 350 milliseconds
- B. 1400 milliseconds
- C. 1000 milliseconds
- D. 250 milliseconds
Answer: C
NEW QUESTION # 629
Which of the following does not belong to IGP?
- A. IS-IS
- B. BGP
- C. RIP
- D. OSPF
Answer: B
NEW QUESTION # 630
RPF has the function of preventing multicast forwarding loops.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION # 631
As shown in the figure, the forwarding of data traffic before roaming is STA-HAP-upper layer network, the forwarding method is direct forwarding, and the home agent is configured on the AP. After three-layer roaming, what is the direction of data forwarding traffic?
- A. STA-FAP-FAC-HAC-HAP-HAC-Upper Network
- B. STA-FAP-FAC-HAC-Upper Network
- C. STA-FAP-FAC-HAC-HAP-Upper Network
- D. STA-FAP-FAC-Upper Network
Answer: C
NEW QUESTION # 632
Regarding the description of the VRRP slave device, which is correct? (Multiple choice)
- A. When receiving a VRRP message with a priority of 0, the Slave will directly switch to the Master
- B. The slave responds to the IP packet whose destination IP address is the virtual IP address
- C. When the slave receives the VRRP message sent by the Master, it can judge whether the status of the Master is normal
- D. The slave will discard IP packets whose destination MMC address is the virtual MAC address
Answer: C,D
NEW QUESTION # 633
Regarding BGP route announcement, which of the following descriptions is wrong? (Multiple choice)
- A. All BGP routes learned from all BGP neighbors are advertised to other BGP neighbors.
- B. Only the best route preferred by BGP can be announced to other BGP neighbors.
- C. Only routes learned from IGP can be advertised to other BGP neighbors.
- D. By default, routes learned from IBGP are not forwarded to other IBGP neighbors.
Answer: A,C
NEW QUESTION # 634
In the OSPF routing protocol, the asbr-summary command can be followed by the not-advertise parameter, which means that aggregated routes are not advertised.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION # 635
Which of the following descriptions about multicast routing is correct? (Multiple choice)
- A. Multicast routing protocols are divided into intra-domain multicast routing protocols and inter-domain multicast routing protocols
- B. Multicast routing forms a unidirectional loopless data transmission path from the data source to multiple receivers, that is, the multicast distribution tree
- C. Multicast routing protocol including IGMP protocol
- D. Multicast routing protocol is used to establish and maintain multicast routing, and forward multicast data packets correctly and efficiently
Answer: A,B,D
NEW QUESTION # 636
Through the linkage between BFD and MPLS LSP, BFD can be dynamically created to detect the connectivity of static or dynamic LSP.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION # 637
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