KaoGuTi的經驗豐富的專家團隊開發出了針對Juniper JN0-352 認證考試的有效的培訓計畫，很適合參加Juniper JN0-352 認證考試的考生。KaoGuTi為你提供的都是高品質的產品，可以讓你參加Juniper JN0-352 認證考試之前做模擬考試，可以為你參加考試做最好的準備。
| Section | Objectives |
|---|---|
| Network Services | - Basic multicast concepts - NAT concepts in Junos |
| Operations and Troubleshooting | - Troubleshooting routing and switching issues - Junos CLI monitoring tools |
| Layer 2 Switching Technologies | - Ethernet switching concepts - VLANs and trunking - Spanning Tree Protocol (STP/RSTP/MSTP) |
| Routing Protocols | - OSPF configuration and troubleshooting - BGP fundamentals and policy control - IS-IS overview |
| High Availability | - Redundancy concepts in enterprise networks - VRRP configuration and behavior |
| Routing Policy and Filtering | - Route filtering and preference control - Policy statements |
目前，考生報考 Juniper 認證最多的科目：JN0-352。選擇 JN0-352 考古題準備考試只是一種方式，優點在于快速有效的幫助考生通過考試。缺點就是缺乏實踐，實踐是在平時的工作之余可以勤加練習。如果決定參加 JN0-352 認證考試并通過考試，拿到屬于自己的 Juniper 的 JN0-352 認證是當務之急。而 JN0-352 考古題可以幫助你在準備考試時節省很多的時間，順利通過考試。
問題 #163
Referring to the exhibit, Router-1 and Router-2 are failing to form an IS-IS adjacency.
What should you do to solve the problem?
答案：A
問題 #164
What are two characteristics of IS-IS? (Choose two.)
答案：A,C
解題說明：
IS-IS (Intermediate System to Intermediate System) was designed by ISO as a link-state Interior Gateway Protocol for routing within a single autonomous system, functioning on a hierarchical two-level model conceptually similar to OSPF's areas, which makes the first statement unambiguously correct. Within that hierarchy, Level 1 routers maintain detailed topology information only for their own local area and use a default route toward the nearest Level 2 or Level 1/Level 2 router to reach destinations outside the area; they explicitly do not carry inter-area topology information and therefore cannot route traffic between areas on their own. Routers that participate in both levels simultaneously - Level 1/Level 2 (L1/L2) routers - sit at the area boundary, maintaining a Level 1 database for their local area and a Level 2 database for the backbone, and it is specifically these dual-level routers that stitch inter-area traffic together, forwarding packets from the local area into the Level 2 backbone and vice versa, which confirms the second correct statement. Regarding route preference, Junos assigns distinct default preference (administrative distance) values of 15 for IS-IS Level 1 routes and 18 for IS-IS Level 2 routes - neither of which is 20 - so the preference-value statement is factually incorrect and included as a distractor testing precise knowledge of Junos default protocol preferences. Reference topics: Junos Enterprise Routing - IS-IS, Level 1, Level 2, and L1/L2 Router Roles; Default Route Preference Values.
問題 #165
You have two OSPF routers forming an adjacency. R1 has a priority of 32 and a router ID of
192.168.1.2. R2 has a priority of 64 and a router ID of 192.168.1.1. The routers were started at the same time and all other OSPF settings are the default settings.
Which statement is correct in this scenario?
答案：C
解題說明：
The router with the highest OSPF priority becomes the DR. In this case, R2 has a higher priority (64) compared to R1's priority (32). Hence, R2 will become the DR.
The router with the next highest priority becomes the BDR. Since R1 has the next highest priority after R2, R1 will become the BDR.
問題 #166
Which statement describes how Rapid Spanning Tree Protocol (RSTP) identifies an alternate port?
答案：D
解題說明：
RSTP, as defined in IEEE 802.1w, introduces explicit, well-defined port roles that go beyond legacy 802.1D STP's simpler root/designated/blocking model, and the alternate port role is one of RSTP's key refinements.
An alternate port is a port that receives BPDUs from a bridge other than the one through which the local switch's actual root port reaches the root bridge - in other words, it represents a second, redundant path toward the root bridge learned from a different upstream bridge than the one currently providing the best (root port) path. Because the existing root port already provides the lowest-cost, actively used path to the root, the alternate port is deliberately held in the discarding (non-forwarding) state during normal, stable operation, functioning purely as a pre-computed, ready-to-use backup; critically, RSTP's major performance advantage over legacy STP is that if the current root port fails, the switch can transition its alternate port directly and almost instantly into the forwarding root port role without needing to pass through the lengthy listening and learning timer-based states that classic STP required, since the alternate port's suitability as a backup was already continuously verified through ongoing BPDU reception. It is not simply 'not receiving BPDUs' (an alternate port receives BPDUs continuously, just inferior ones relative to the current root port), it is not itself the least-cost path (that describes the root port), and it does not forward based on designated-port overload, which is not a concept that exists in RSTP's port-role logic at all. Reference topics: Junos Enterprise Switching - Spanning Tree Protocols, RSTP Port Roles: Alternate and Backup Ports.
問題 #167
What are two characteristics of RSTP alternate ports? (Choose two.)
答案：B,C
解題說明：
A is correct because RSTP alternate ports block traffic while receiving superior BPDUs from a neighboring switch. An alternate port is a backup port for a root port, which means it receives better BPDUs from another bridge than the current root port. However, an alternate port does not forward any traffic, as it is in a discarding state. It only listens to BPDUs and waits for the root port to fail. If the root port fails, the alternate port can immediately transition to a forwarding state and become the new root port.
C is correct because RSTP alternate ports provide an alternate higher cost path to the root bridge. An alternate port is selected based on the same criteria as the root port, which are the lowest bridge ID, the lowest path cost, the lowest sender port ID, and the lowest receiver port ID.
However, an alternate port receives a higher cost BPDU than the root port, otherwise it would be the root port itself. Therefore, an alternate port provides an alternate higher cost path to the root bridge than the root port.
問題 #168
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JN0-352證照資訊: https://www.kaoguti.com/JN0-352_exam-pdf.html