真実的なJN0-351的中合格問題集一回合格-高品質なJN0-351日本語版試験解答

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JuniperのJN0-351認定試験は競争が激しい今のIT業界中でいよいよ人気があって、受験者が増え一方で難度が低くなくて結局専門知識と情報技術能力の要求が高い試験なので、普通の人がJuniper認証試験に合格するのが必要な時間とエネルギーをかからなければなりません。

Juniper JN0-351 認定試験の出題範囲：

トピック	出題範囲
トピック 1	Protocol Independent Routing: An essential domain for understanding routing components outside protocol dependencies, this topic enhances expertise in configuring, monitoring, and troubleshooting critical elements.
トピック 2	BGP: This topic focuses on the operational and conceptual elements of BGP, a cornerstone in enterprise networks.
トピック 3	IS-IS: Aspiring Juniper networking professionals enhance their understanding of IS-IS routing protocols. This topic equips candidates with the knowledge to configure and monitor IS-IS systems, addressing specific exam challenges and practical applications.
トピック 4	Layer 2 Security: This topic introduces Layer 2 protection mechanisms and firewall filters to fortify network security. Practical skills in configuring, monitoring, and troubleshooting these features prepare candidates to address exam objectives and real-world challenges effectively.

>> JN0-351的中合格問題集 <<

JN0-351日本語版試験解答 & JN0-351模擬試験

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Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) 認定 JN0-351 試験問題 (Q184-Q189):

質問 # 184
Which statement is correct regarding Junos OS unicast reverse path forwarding (RPF) checks?

A. RPF checks require BGP to function.
B. RPF checks are only used for multicast traffic.
C. RPF checks are applied only to outbound traffic.
D. RPF checks are used to prevent IP address spoofing by verifying that a packet arrives on the interface that would be used to route back to the source.

正解：D

解説：
Unicast Reverse Path Forwarding (RPF) is a security mechanism that verifies whether a received packet's source address is reachable through the interface on which it arrived, based on the routing table. If the check fails, indicating a potentially spoofed source address, the packet can be discarded, helping to prevent IP spoofing-based attacks.

質問 # 185
Referring to the exhibit, which two statements about BGP prefixes advertised by R1 to AS 65501 are true? (Choose two.)

A. R1 will modify the cluster list attribute in prefixes advertised to AS 65501
B. R1 will modify the originator ID attribute in prefixes advertised to AS 65501
C. R1 will modify the AS path attribute in prefixes advertised to AS 65501
D. R1 will modify the next-hop attribute in prefixes advertised to AS 65501

正解：B、D

質問 # 186
Which two statements about MACsec are true? (Choose two.)

A. MACsec functions on point-to-multipoint connections.
B. MACsec does not provide data integrity.
C. MACsec is an IEEE standard.
D. MACsec functions on point-to-point connections.

正解：C、D

質問 # 187
Exhibit.

Which router will become the OSPF BDR if all routers are powered on at the same time?

A. R1
B. R3
C. R2
D. R4

正解：D

解説：
Explanation
OSPF DR/BDR election is a process that occurs on multi-access data links. It is intended to select two OSPF nodes: one to be acting as the Designated Router (DR), and another to be acting as the Backup Designated Router (BDR).The DR and BDR are responsible for generating network LSAs for the multi-access network and synchronizing the LSDB with other routers on the same network1.
The DR/BDR election is based on two criteria: the OSPF priority and the router ID. The OSPF priority is a value between 0 and 255 that can be configured on each interface participating in OSPF. The default priority is
1. A priority of 0 means that the router will not participate in the election and will never become a DR or BDR. The router with the highest priority will become the DR, and the router with the second highest priority will become the BDR. If there is a tie in priority, then the router ID is used as a tie-breaker. The router ID is a
32-bit number that uniquely identifies each router in an OSPF domain.It can be manually configured or automatically derived from the highest IP address on a loopback interface or any active interface2.
In this scenario, all routers have the same priority of 1, so the router ID will determine the outcome of the election. The router IDs are shown in the exhibit as RID values. The highest RID belongs to R4 (10.10.10.4), so R4 will become the DR. The second highest RID belongs to R3 (10.10.10.3), so R3 will become the BDR.
References:
1:OSPF DR/BDR Election: Process, Configuration, and Tuning2:OSPF Designated Router (DR) and Backup Designated Router (BDR)

質問 # 188
Which statement is correct regarding the Junos OS "show route" command output field
"Preference"?

A. It represents the administrative distance of the route, used to select the best route among multiple protocols advertising the same prefix.
B. It represents the BGP local preference attribute only.
C. It has no effect on route selection.
D. It is only displayed for static routes.

正解：A

解説：
In Junos OS, the "Preference" field displayed in the output of "show route" represents the administrative distance assigned to a route by its source protocol. When multiple routing protocols advertise a route for the same destination prefix, Junos OS selects the route with the lowest preference value as the active route in the forwarding table.

質問 # 189
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