JN0-351인증시험인기덤프문제 - JN0-351자격증공부

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Juniper JN0-351 시험요강:

주제	소개
주제 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.
주제 2	OSPF: The concepts and operational details of OSPF are explored, providing tools for routing efficiency. Configuration and troubleshooting mastery ensure readiness for both the exam and complex enterprise environments.
주제 3	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.
주제 4	Spanning Tree: Networking professionals explore the principles and advantages of the Spanning Tree Protocol (STP) to ensure loop-free topologies in Layer 2 networks.
주제 5	BGP: This topic focuses on the operational and conceptual elements of BGP, a cornerstone in enterprise networks.
주제 6	Tunnels: The fundamentals of IP tunneling are emphasized, highlighting their requirements and functionalities. Mastery in configuring, monitoring, and troubleshooting tunnels equips professionals to meet the demands of the JN0-351 exam.

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최신 JNCIS-ENT JN0-351 무료샘플문제 (Q174-Q179):

질문 # 174
Which statement correctly describes the purpose of BPDU protection in Junos OS?

A. It is used only on trunk ports carrying multiple VLANs.
B. It disables a port that receives a BPDU when the port is configured as an edge port, preventing unauthorized switches from participating in the spanning tree.
C. It replaces the need for root protection.
D. It prevents the local switch from processing configuration changes.

정답：B

설명：
BPDU protection is applied to edge ports (ports expected to connect only to end hosts) to guard against unauthorized or rogue switches being connected. If a BPDU is received on a protected edge port, the port is automatically disabled, preventing potential spanning tree topology changes caused by unauthorized devices.

질문 # 175
Exhibit

You are a network operator troubleshooting BGP connectivity.
Which two statements are correct about the output shown in the exhibit? (Choose two.)

A. Peer 10.32.1.2 is configured for AS 63645.
B. The R1 is configured for AS 65400.
C. The routers are exchanging IPv4 routes.
D. The BGP session is not established.

정답：B,D

설명：
Explanation
Option B suggests that the BGP session is not established. This is correct because in the output, the state of the BGP session is shown as "Idle". In BGP, an "Idle" state means that the BGP session is not currently established1.
Option C suggests that R1 is configured for AS 65400. This is also correct because in the output, it's shown that the local AS number is 654001. The local AS number represents the Autonomous System (AS) number of the router on which you're checking the BGP session1.

질문 # 176
What is the maximum allowable MTU size for a default GRE tunnel without IPv4 traffic fragmentation?

A. 1480 bytes
B. 1496 bytes
C. 1500 bytes
D. 1476 bytes

정답：D

설명：
The maximum allowable MTU size for a default GRE tunnel without IPv4 traffic fragmentation is
1476 bytes. This is because GRE packets are formed by the addition of the original packets and the required GRE headers. These headers are 24-bytes in length and since these headers are added to the original frame, depending on the original size of the packet we may run into IP MTU problems. The most common IP MTU is 1500-bytes in length (Ethernet). When the tunnel is created, it deducts the 24-bytes it needs to encapsulate the passenger protocols and that is the IP MTU it will use. For example, if we are forming a tunnel over FastEthernet (IP MTU 1500) the IOS calculates the IP MTU on the tunnel as: 1500-bytes from Ethernet-24-bytes for the GRE encapsulation = 1476-Bytes.

질문 # 177
Which two statements correctly describe RSTP port roles? (Choose two.)

A. The backup port is used as a backup for the root port.
B. The designated port forwards data to the downstream network segment or device.
C. The alternate port is a standby port for an edge port.
D. The root port is responsible for forwarding data to the root bridge.

정답：B,D

설명：
In Rapid Spanning Tree Protocol (RSTP), there are several port roles that determine the behavior of the port in the spanning tree 1 .
Option A suggests that the designated port forwards data to the downstream network segment or device. This is correct because the designated port is the port on a network segment that has the best path to the root bridge
1 . It's responsible for forwarding frames towards the root bridge and sending configuration messages into its segment 1 .
Option D suggests that the root port is responsible for forwarding data to the root bridge. This is also correct because the root port is always the link directly connected to the root bridge, or the shortest path to the root bridge 1 . It's used to forward traffic towards the root bridge 1 .
Therefore, options A and D are correct.

질문 # 178
Which two statements are correct about using firewall filters on EX Series switches? (Choose two.)

A. You can only apply firewall filters to Layer 2 traffic on an EX Series switch.
B. You can deploy both stateless and stateful firewall filters on an EX Series switch.
C. You can deploy only stateless firewall filters on an EX Series switch.
D. You can apply firewall filters to both Layer 2 and Layer 3 traffic on an EX Series switch.

정답：C,D

설명：
* A is correct because you can deploy only stateless firewall filters on an EX Series switch. A stateless firewall filter is a filter that evaluates each packet individually based on the header information, such as source and destination addresses, protocol, and port numbers 1 . A stateless firewall filter does not keep track of the state or context of a packet flow, such as the sequence number, flags, or session information
1 . EX Series switches support only stateless firewall filters, which are also called access control lists (ACLs) or packet filters 2 .
* C is correct because you can apply firewall filters to both Layer 2 and Layer 3 traffic on an EX Series switch. Layer 2 traffic is traffic that is switched within a VLAN or a bridge domain, while Layer 3 traffic is traffic that is routed between VLANs or networks 3 . EX Series switches support three types of firewall filters: port (Layer 2) firewall filters, VLAN firewall filters, and router (Layer 3) firewall filters 4 . You can apply these filters to different interfaces and directions to control the traffic entering or exiting the switch.

질문 # 179
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Juniper인증 JN0-351시험은 IT인증시험중 가장 인기있는 시험입니다. Juniper인증 JN0-351시험패스는 모든 IT인사들의 로망입니다. Itexamdump의 완벽한 Juniper인증 JN0-351덤프로 시험준비하여 고득점으로 자격증을 따보세요.

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