Verified H12-821_V1.0 dumps Q&As - Pass Guarantee Exam Dumps Test Engine [2021]
H12-821_V1.0 dumps and 62 unique questions
NEW QUESTION 28
Which of the following statements about multicast packet forwarding is true?
- A. If a multicast data packet fails the RPF check, the packet must have been received through a sub-optimal interface. However, this interface still receives and forwards the multicast traffic downstream.
- B. IGMP snooping cannot control the scope of multicast traffic flooding on a Layer 2 network.
- C. The source address of a multicast packet is a unicast address.
- D. In multicast transmission, the destination address of a packet can be the unicast address of a host.
Answer: A
NEW QUESTION 29
Which of the following attribute must be carried in an Update message?
- A. Prefval
- B. MED
- C. AS-Path
- D. Local-pref
Answer: D
NEW QUESTION 30
In a route-policy, which of the following BGP attributes can be used in apply clauses?
- A. AS_Path
- B. Local-Preference
- C. MED
- D. Tag
Answer: A,B,C
NEW QUESTION 31
RSTP provides different functions in different scenarios. Which of the following statements Is false?
- A. If the edge port on the switch enabled with BPDU protection receives RST BPDU, the switch sets the edge port as a non-edge-port and triggers STP calculation
- B. When the designated port enabled with root protection receives optimal RST BPDUs, the port enters the Discarding state and does not forward packets. If the port does not receive optimal RST BPDUs within a certain period of time, the port will automatically restore to the Forwarding state
- C. After TC-BPDU attack defense function is enabled, you can set the number of times the switch processes TC BPDUs within a certain period
- D. The role of the designated port that is enabled with root protection cannot be changed
Answer: A
NEW QUESTION 32
OSPF supports area authentication and interface authentication. If both authentication modes are configured, Interface authentication takes preference over area authentication.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 33
If a router ID is configured in both the system via and the BGP view, BGP uses the router ID configured in the BGP view because the BGP view takes precedence over the system view.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 34
Which of the following statements regarding IGMPv1 and IGMPv2 are true?
- A. IGMPv1 supports general query.
- B. 1GMPv2 supports only general query.
- C. 1GMPv2 defines the Leave message type.
- D. IGMPv1 does not define the IGMP Leave message type.
Answer: A
NEW QUESTION 35
Which of the following statements regarding the summary automatic command and BGP route summarization is false?
- A. After this command is configured, BGP summarizes routes based on natural network segments
- B. After this command is configured, BGP sends only the summarized routes to peers
- C. This command is used to implement automatic summarization. Automatic summarization takes precedence over manual summarization
- D. This command enables automatic summarization for the locally imported routes
Answer: A
NEW QUESTION 36
Which of the following is the default interval at which the DIS on a broadcast IS_IS network sends CSNPs.
- A. 0
- B. 1
- C. 2
- D. 3.3
Answer: B
NEW QUESTION 37
As shown in the following figure, a new AP is deployed In dual link MSB networking (load balancing mode).
Which AC will the connect to?
- A. None
- B. AC1
- C. AC2
- D. Random access
Answer: A
NEW QUESTION 38
Which of the following attacks is not the network layer attack?
- A. IP spoofing attack
- B. ICMP attack
- C. ARP spoofing attack
- D. Smurf attack
Answer: C
NEW QUESTION 39
There are two BFD operating modes. In_______mode, the local end sends BFD Control packets at specified intervals, and the remote end checks whether the local end periodically sends BFD Control packets. (Use lowercase letters.)
Answer:
Explanation:
primary
NEW QUESTION 40
A switch runs MSTP. The configuration is shown in the figure. What is the role of this switch in MSTI 1?
- A. Secondary root switch
- B. Root switch
- C. Non-root switch
- D. Uncertain
Answer: D
NEW QUESTION 41
Which of the following statements about the forwarding plane of a switch is false?
- A. Consists of main control boards and interface boards.
- B. Can collect packet statistics.
- C. Provides high-speed and non-blocking data channels.
- D. Can encapsulate and decapsulate packets.
Answer: B
NEW QUESTION 42
Which of the following statements is false, based on the following IGMP information on an interface of RTA?
- A. The maximum time for response to Query messages is 10s.
- B. The interval for sending group-specific Query messages is 60s.
- C. The IGMP version is IGMPV2.
- D. The IP address of the interface is 192.168.1.1.
Answer: A
NEW QUESTION 43
ON a stateful inspection Firewall where there is no session table, when the status detection mechanism is enabled and the second packet (CYN+ACK) of 3-way hadshakes reaches the firewall. Which of the following statements is true?
- A. If the firewall security policy permits packets to pass, the session table is created.
- B. Packets must pass the firewall, and a session table is established.
- C. If the firewall security policy permits packets to pass, the packets can pass the firewall.
- D. By default, when status detection is disabled and the permit policy is configured packets can pass.
Answer: A
NEW QUESTION 44
Four routers run ISIS and have established adjacencies. The area IDs and router levels are marked in the following figure. If route leaking is configured on R3, which of the following is the cost of the route from R4 to 10.0.2.2/32?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 45
Which of the following statements regarding OSPF route summarization is false?
- A. OSPF supports two route summarization modes: ABR summarization and ASBR summarization.
- B. Route summarization can reduce routing information, decrease the routing table size, and improve router performance.
- C. Any router in OSPF can summarize routes.
- D. Route summarization is the process of summarizing routes with the same prefix into one route and then advertising only the summarized route to other areas.
Answer: B
NEW QUESTION 46
A monitoring plane usually comprises the monitoring units of main control boards and interface boards. This plane can monitor the system environment independently. Which of the following environment monitoring functions can be provided by the monitoring plane?
- A. Fan control
- B. System power-on and power-off control
- C. Voltage monitoring
- D. Temperature monitoring
Answer: D
NEW QUESTION 47
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