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| Section | Objectives |
|---|---|
| Tunnels | - IP tunneling concepts - GRE and IP-IP configuration and troubleshooting |
| IS-IS | - Adjacencies and troubleshooting - Link-state database and PDUs - Levels, areas and metrics |
| Layer 2 Security | - Port security (MAC limiting, DHCP snooping, DAI, IP source guard) - BPDU, loop and root protection - MACsec and storm control - Layer 2 firewall filters |
| Layer 2 Switching and VLANs | - Native VLANs and voice VLANs - Inter-VLAN routing - Frame processing - Ports and VLAN tagging - Bridging components |
| Protocol-Independent Routing | - Martian addresses and RIB groups - Static, aggregate, generated routes - Load balancing and filter-based forwarding |
| High Availability | - Link Aggregation Groups and RTG - VRRP, NSR, NSB and BFD - Virtual chassis and graceful restart |
| Spanning Tree | - Convergence and reconvergence - STP and RSTP concepts, roles and states - Bridge Protocol Data Units (BPDUs) |
| OSPF | - Link-state database and packet types - Router ID, adjacencies and neighbors - Areas and LSA types |
| BGP | - EBGP and IBGP peer interactions - BGP basic operations and message types - Attributes and path selection |
한번에Juniper인증JN0-352시험을 패스하고 싶으시다면 완전 페펙트한 준비가 필요합니다. 완벽한 관연 지식터득은 물론입니다. 우리Itcertkr의 자료들은 여러분의 이런 시험준비에 많은 도움이 될 것입니다.
질문 # 138
Which three statements are correct about OSPF packet types? (Choose three.)
정답：A,B,D
질문 # 139
Which statement is correct about how a Juniper Networks EX Series Switch learns MAC addresses?
정답：A
설명：
Layer 2 MAC learning on an EX Series switch, as on any standard Ethernet bridge, is a passive, frame-driven process rather than an active polling or query-based mechanism. Every time a frame arrives on any interface, the switch inspects the frame's source MAC address field and, if that address is not already present in the Ethernet switching (bridge) table for the associated VLAN, creates a new dynamic entry recording the source MAC address, the VLAN it was learned on, and the specific ingress interface through which the frame arrived. Junos also stamps each learned entry with an aging timestamp, which is refreshed every time a subsequent frame from that same source MAC is received; entries that receive no refreshing traffic within the configured MAC aging interval (300 seconds by default) are eventually purged from the table to keep it current and to reclaim table space from hosts that have moved or gone offline. This source-address-driven, per-frame learning process happens continuously and automatically with no dependency on spanning-tree state changes - although a topology change notification can trigger accelerated aging of the table to flush potentially stale entries faster, learning itself is not gated by or contingent upon such an event occurring. The switch never learns addresses from the destination field of a frame, since the destination address, if already known, is used purely for the forwarding lookup decision, not for populating new table entries. Reference topics: Junos Enterprise Switching - Layer 2 Switching Fundamentals, Source MAC Learning and Table Aging.
질문 # 140
Which OSPF packet type is sent when an OSPF router detects its database is stale?
정답：C
질문 # 141 
Click the Exhibit button.
You configure the aggregate route 172.16.0.0/16 on router R1. The routing table currently contains active routes for 172.16.10.0/24 and 172.16.99.0/24. No other more-specific routes exist.
Referring to the exhibit, which statement describes what R1 would do with traffic destined to 172.16.200.5?
정답：D
설명：
The destination address 172.16.200.5 falls within the 172.16.0.0/16 aggregate's summarized range but does not fall within either of the two active, more-specific contributing routes actually present in the table -
172.16.10.0/24 and 172.16.99.0/24 - meaning no route more specific than the /16 itself exists to cover it.
Under Junos's longest-match forwarding logic, the lookup for 172.16.200.5 therefore resolves to the aggregate route itself, and since aggregate routes are installed by default with a reject next hop rather than any real forwarding path, the router drops the packet and simultaneously generates an ICMP destination-unreachable message back to the originating source, explicitly signaling that no valid path exists for that specific destination even though a covering summary is being advertised. This reject behavior is precisely why aggregate routes are valuable for reducing the number of routes advertised upstream while still providing clear, immediate feedback for traffic aimed at address space within the summary that has no genuine underlying route, rather than silently black-holing it or misdirecting it toward an unrelated contributing route's next hop. The aggregate route itself remains active and installed throughout this process - a gap in contributing coverage does not deactivate the aggregate, since the aggregate's activation depends only on at least one contributing route being active, which is satisfied here by both existing /24 blocks. There is also no default route present in this scenario to fall back upon. Reference topics: Junos Enterprise Routing - Protocol Independent Routing, Aggregate Route Reject Behavior for Uncovered Address Space.
질문 # 142
Referring to the exhibit, which statement is correct?
정답：A
설명：
The "Root ID" shows 4096.00:19:e2:55:36:1e. The first part of this ID, 4096, is the bridge priority of the root bridge.
The local bridge ID is shown as 32768.00:19:e2:55:1d:30, indicating that the local device has a default bridge priority of 32768, which is higher (and thus less preferred) than 4096.
Thus, the root bridge has a priority of 4096, and the local device is not the root bridge. The local device is participating in the RSTP topology and has identified another bridge as the root.
질문 # 143
......
근 몇년간IT산업이 전례없이 신속히 발전하여 IT업계에 종사하는 분들이 여느때보다 많습니다. 경쟁이 이와같이 치열한 환경속에서 누구도 대체할수 없는 자기만의 자리를 찾으려면 IT인증자격증취득은 무조건 해야 하는것이 아닌가 싶습니다. Juniper인증 JN0-352시험은 IT인증시험중 가장 인기있는 시험입니다. Itcertkr에서는 여러분이Juniper인증 JN0-352시험을 한방에 패스하도록 실제시험문제에 대비한Juniper인증 JN0-352덤프를 발췌하여 저렴한 가격에 제공해드립니다.시험패스 못할시 덤프비용은 환불처리 해드리기에 고객님께 아무런 페를 끼치지 않을것입니다.
JN0-352인증덤프샘플 다운: https://www.itcertkr.com/JN0-352_exam.html