H12-821_V1.0 Prüfungsfragen Prüfungsvorbereitungen, H12-821_V1.0 Fragen und Antworten, HCIP-Datacom-Core Technology V1.0

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H12-821_V1.0 Praxisprüfung, H12-821_V1.0 Unterlage

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Huawei HCIP-Datacom-Core Technology V1.0 H12-821_V1.0 Prüfungsfragen mit Lösungen (Q400-Q405):

400. Frage
Which of the following descriptions about configuring the set-overload command in IS-IS is correct?

A. This command allows the device to set the time for the system to maintain the overload flag according to the state of BGP convergence
B. This command is used to specify that the Hello message sent after the device restarts carries the SA bit
C. This command is used to enable IS-IS to automatically calculate the interface cost according to the bandwidth
D. This command is used to set the overload flag bit of non-pseudo-node LSP

Antwort: D

401. Frage
The following figure shows the OSPF network of an enterprise and the OSPF configurations of R1. Which of the following statements is false about the network?

A. R2 can access the server.
B. GE 0/0/1 of R1 cannot send OSPF packets.
C. GE 0/0/1 of R1 cannot accept OSPF packets.
D. The network segment to which GE 0/0/1 of R1 belongs cannot be advertised.

Antwort: D

Begründung:
Silent Interface Explanation
Thesilent-interfacecommand is used to prevent OSPF from sending or receiving OSPF packets on the specified interface (GE 0/0/1). This disables OSPF adjacency establishment and stops route advertisement for that interface.
Network Observations
Statement A: R2 can access the server.This is correct, as the silent interface does not impact data traffic, only OSPF-related communication.
Statement B: GE 0/0/1 of R1 cannot send OSPF packets.Correct due to thesilent-interfaceconfiguration.
Statement C: The network segment to which GE 0/0/1 of R1 belongs cannot be advertised.This is correct, as the silent interface prevents route advertisement.
Statement D: GE 0/0/1 of R1 cannot accept OSPF packets.Correct, as the silent interface configuration blocks packet reception.
HCIP-Datacom-Core Reference
OSPF interface command behavior is outlined in the configuration and lab examples sections.

402. Frage
The header of an IP packet is shown in the figure.

Based on this packet, which of the following is correct?

A. The packet must be an IPsec VPN packet encapsulated with only AH
B. The message is an IPsec VPI message, and the data part of the message is encrypted
C. The protocol number is 51, which means that the message after the IP Header is the AH header
D. The protocol number is 51, which means that the message after the IP Header is the ESP header

Antwort: C

403. Frage
Which of the following reasons may prevent OSPF neighbor relationships from being established? (Multiple choice)

A. The two directly connected interfaces use the p2p network type, but the IP packet with the destination IP address 224.0.0.6 is refused to be transmitted.
B. The two routers are set with different Process IDs
C. The sending intervals of Hello messages between the two routers are inconsistent.
D. Two routers are configured with the same Router ID.
E. The two directly connected interfaces use different network types.
F. The dr-priority of the two directly connected interfaces is set to 0.

Antwort: D,E

404. Frage
A filter named si is configured on a device using the as-path-filter command and is applied to a specified BGP peer. The detailed configurations are as follows:
csharp
Copy
[SW1] ip as-path-filter si permit _65500$
[SW1] bgp 65100
[SW1-bgp] ipv4-family unicast
[SW1-bgp-af-ipv4] peer 10.1.1.2 as-path-filter si import
After the configuration is complete, which of the following statements is true about the way the local device processes the routes received from the peer?

A. It accepts only the routes forwarded by AS 65500.
B. It accepts only the routes that last pass through AS 65500.
C. It accepts only the routes whose AS_Path contains AS 65500.
D. It accepts only the routes originated from AS 65500.

Antwort: B

Begründung:
Comprehensive and Detailed Step-by-Step Explanation:
1. Understanding the AS-Path Filter:
* The as-path-filter command is used in BGP to filter routes based on the AS_PATH attribute.
* In this configuration:
* The filter si is defined with the regular expression _65500$.
* The _65500$ expression specifies that the AS_PATH must end with 65500, meaning that the route's last hop must have passed through AS 65500.
2. Option Analysis:
Option A: It accepts only the routes whose AS_Path contains AS 65500.
* Incorrect.
* The _65500$ filter specifically matches routes where AS 65500 is the last AS in the AS_PATH. A route may contain AS 65500 somewhere in the middle of the AS_PATH but will not match this filter unless it is the last AS.
Option B: It accepts only the routes originated from AS 65500.
* Incorrect.
* Routes that originate from AS 65500 have an AS_PATH that starts with 65500. However, the filter
_65500$ only matches routes where AS 65500 is the last AS, not the first AS.
Option C: It accepts only the routes that last pass through AS 65500.
* Correct.
* The _65500$ filter ensures that the AS_PATH ends with 65500. This means that the route must have last passed through AS 65500 before being received by the local BGP router.
Option D: It accepts only the routes forwarded by AS 65500.
* Incorrect.
* While AS 65500 may forward the route, this is not what the filter _65500$ specifically checks for. It only ensures that AS 65500 is the last AS in the AS_PATH.
3. Summary:
* The as-path-filter with _65500$ accepts only the routes where AS 65500 is the last AS in the AS_PATH.

405. Frage
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H12-821_V1.0 Praxisprüfung: https://www.zertpruefung.ch/H12-821_V1.0_exam.html

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