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Juniper JN0-352 Exam Syllabus Topics:

Section	Objectives
Operations and Troubleshooting	- Junos CLI monitoring tools - Troubleshooting routing and switching issues
Routing Protocols	- BGP fundamentals and policy control - OSPF configuration and troubleshooting - IS-IS overview
High Availability	- Redundancy concepts in enterprise networks - VRRP configuration and behavior
Routing Policy and Filtering	- Policy statements - Route filtering and preference control
Network Services	- Basic multicast concepts - NAT concepts in Junos
Layer 2 Switching Technologies	- VLANs and trunking - Spanning Tree Protocol (STP/RSTP/MSTP) - Ethernet switching concepts

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Juniper JN0-352日本語、JN0-352 PDF

多分、JN0-352テスト質問の数が伝統的な問題の数倍である。Juniper　JN0-352試験参考書は全ての知識を含めて、全面的です。そして、JN0-352試験参考書の問題は本当の試験問題とだいたい同じことであるとわかります。JN0-352試験参考書があれば,ほかの試験参考書を勉強する必要がないです。

Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) 認定 JN0-352 試験問題 (Q10-Q15):

質問 # 10
Which statement is correct about GRE tunnels?

A. GRE tunnels only support encapsulating non-IP traffic.
B. The time-to-live field in the tunnel payload is decremented during transit.
C. GRE tunnels only support encapsulating IP traffic.
D. There are 20 bytes of overhead with GRE encapsulation.

正解：B

質問 # 11
You are deploying a Juniper Networks EX Series Switch to connect 24 end devices to VLAN 70, with an uplink interface to a distribution switch that carries VLANs 30, 50, and 70. You need to correctly configure the interface type for the end-device interfaces. In this scenario, which statement is correct?

A. No configuration is needed since VLAN 70 is the highest VLAN-ID.
B. Use trunk mode with VLAN 70 as the only allowed VLAN.
C. Use trunk mode with VLAN 70 set as the native VLAN.
D. Use access mode and assign the interfaces to VLAN 70.

正解：D

解説：
Each of the 24 end-device-facing interfaces in this scenario needs to carry traffic for exactly one VLAN, and the end devices themselves are ordinary hosts that neither expect nor generate
802.1Q- tagged frames. This is precisely the definition of an access port in Junos: family ethernet-switching interface-mode is set to access, and a single vlan members statement assigns the port to VLAN 70. Access mode ensures frames egressing toward the host are untagged and any frames received are implicitly treated as belonging to the configured VLAN, which is both simpler to manage and more efficient than trunking, since access ports do not carry the 802.1Q tag overhead nor process VLAN pruning logic relevant only to multi-VLAN links. Trunk mode, by contrast, is reserved for switch-to- switch or switch-to-router links that must simultaneously carry frames for multiple VLANs, such as the uplink toward the distribution switch that transports VLANs 30, 50, and 70 together -- configuring the 24 host-facing ports as trunks (with or without a native VLAN) would be functionally incorrect and operationally wasteful, since end devices have no need to interpret VLAN tags. There is also no such behavior in Junos where VLAN-ID numeric value dictates default port behavior, making the 'no configuration needed' option a distractor with no basis in EX Series switching architecture.

質問 # 12
You are using tunnels in your network. It is important that the routes be specific enough to ensure that the tunnels are established. You need to prevent a route that is new to the network from being used. In this scenario, which type of route should be used?

A. static
B. aggregate
C. anycast
D. multicast

正解：A

質問 # 13
On Juniper devices, which statement correctly describes a basic characteristic of a GRE tunnel?

A. GRE tunnels maintain session state information about the remote endpoint.
B. GRE tunnels support only IPv4 payload encapsulation.
C. GRE tunnels need keepalives configured by default to stay operational.
D. GRE tunnels require the tunnel endpoints to have a valid route to each other.

正解：D

解説：
GRE is fundamentally a stateless encapsulation protocol: the encapsulating router simply wraps the passenger packet in a GRE header and an outer delivery IP header and forwards it based on ordinary IP routing table lookups toward the configured tunnel destination address. For that forwarding to succeed, the underlying (global or routing-instance) routing table on each endpoint must contain a valid, reachable route to the far-end tunnel address; without such a route, the tunnel interface will not come up or will be unable to deliver traffic, since GRE relies entirely on the existing IP infrastructure rather than any tunnel-specific signaling to establish reachability. Because GRE has no built-in state machine or session negotiation, it does not natively track whether the remote endpoint is alive - that requires an optional add-on such as GRE keepalives or BFD, neither of which is enabled by default; an operator must explicitly configure them if failure detection is required. GRE is also protocol-agnostic rather than IPv4-only: it can encapsulate IPv4, IPv6, MPLS, and other network-layer protocols as the passenger, which is one of its defining advantages over IP-in-IP tunneling.
Finally, because GRE keeps no per-session state about the peer, it cannot detect or report tunnel failures on its own, reinforcing why route reachability is the one true prerequisite for tunnel operation. Reference topics:
Junos Enterprise Routing - Tunneling, Understanding Generic Routing Encapsulation.

質問 # 14
You are combining two existing interfaces into a single LAG interface, but you do not see the LAG interface being created. Which two actions are required to solve this problem? (Choose two.)

A. Ensure that LAG is enabled on each member interface.
B. Ensure that LAG is enabled on the chassis.
C. Ensure that the first LAG interface name is ae0.
D. Ensure that the first LAG interface name is ae1.

正解：B、C

質問 # 15
......

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JN0-352日本語: https://www.jpshiken.com/JN0-352_shiken.html