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Huawei H12-821_V1.0 (HCIP-Datacom-Core Technology V1.0) Exam is a certification exam designed to test the knowledge and skills of professionals in the field of data communications. H12-821_V1.0 exam is part of the Huawei certification program and is aimed at individuals who want to validate their expertise in core data communication technologies. H12-821_V1.0 exam covers a wide range of topics, including network architecture, protocols, and technologies related to data communications.
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NEW QUESTION # 174
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?
Answer: A,B,C,D
Explanation:
The monitoring plane's primary role is environmental monitoring, ensuring the stability of the system.
Functions like voltage monitoring, temperature tracking, fan speed control, and power management are standard. These are independent of the forwarding or control planes and critical for maintaining device health in network operations .
NEW QUESTION # 175
Compared with STP, RSTP defines the different port states. Which of the following statements regarding discarding and learning states are true?
Answer: B,C
Explanation:
In RSTP, a port in the discarding state neither forwards data frames nor learns MAC addresses. A port in the learning state does not forward data frames but starts learning MAC addresses. Therefore, options A and B are correct, while C and D are incorrect due to misunderstandings of these states .
NEW QUESTION # 176
A session is an entry used to record the connection status of a protocol and is fundamental for the firewall to forward packets. Which of the following protocol packets will the firewall create sessions for?
Answer: C,D
Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
1. What is a Firewall Session?
* A firewall session is an entry used to maintain the connection state of a protocol.
* When a packet is forwarded, the firewall creates a session for it and tracks subsequent packets for the same connection to ensure efficient forwarding and security enforcement.
2. Analysis of Each Option:
Option A: Subsequent fragment
* Incorrect.
* A session is created for the initial fragment of a packet. Subsequent fragments are matched to the existing session and do not trigger the creation of a new session.
Option B: ICMP error packet
* Incorrect.
* ICMP error packets (e.g., Destination Unreachable) are considered exceptions and do not create new sessions.
Option C: GRE (Generic Routing Encapsulation)
* Correct.
* GRE is a tunneling protocol that encapsulates packets. A firewall creates a session for GRE traffic to track the state of the encapsulated connection.
Option D: TCP (Transmission Control Protocol)
* Correct.
* TCP is a connection-oriented protocol, and firewalls create sessions for TCP connections to track their state (e.g., SYN, SYN-ACK, FIN).
3. Summary:
* The firewall creates sessions for GRE and TCP protocols.
NEW QUESTION # 177
Which of the following statements is false, based on the following IGMP information on an interface of RTA?
XC
Answer: D
Explanation:
The information provided indicates that the configured query interval is 60 seconds, which applies to general queries. Group-specific queries are sent at a shorter interval, usually derived from the maximum response time. Therefore, the statement about a 60-second interval for group-specific queries is false. Other statements regarding maximum response time (10s), IP address, and IGMP version (V2) are correct .
NEW QUESTION # 178
Which of the following attributes must be carried when BGP sends route update messages?
Answer: B,D
Explanation:
* Mandatory BGP Attributes
* Next_Hop: Specifies the next hop to reach the destination.
* AS_Path: Lists the autonomous systems traversed, crucial for loop prevention and route selection.
* Optional Attributes
* MED (Multi-Exit Discriminator) and Local_Preference are optional attributes that aid in route preference but are not mandatory.
* HCIP-Datacom-Core Reference
* BGP attribute behavior and classifications are detailed in BGP path selection principles.
NEW QUESTION # 179
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