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Juniper JN0-352 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Tunnels | - GRE and IP-IP configuration and troubleshooting - IP tunneling concepts |
| Topic 2: Spanning Tree | - Bridge Protocol Data Units (BPDUs) - STP and RSTP concepts, roles and states - Convergence and reconvergence |
| Topic 3: Layer 2 Switching and VLANs | - Native VLANs and voice VLANs - Ports and VLAN tagging - Frame processing - Bridging components - Inter-VLAN routing |
| Topic 4: Protocol-Independent Routing | - Martian addresses and RIB groups - Static, aggregate, generated routes - Load balancing and filter-based forwarding |
| Topic 5: Layer 2 Security | - BPDU, loop and root protection - MACsec and storm control - Layer 2 firewall filters - Port security (MAC limiting, DHCP snooping, DAI, IP source guard) |
| Topic 6: High Availability | - VRRP, NSR, NSB and BFD - Virtual chassis and graceful restart - Link Aggregation Groups and RTG |
| Topic 7: OSPF | - Router ID, adjacencies and neighbors - Areas and LSA types - Link-state database and packet types |
| Topic 8: IS-IS | - Link-state database and PDUs - Levels, areas and metrics - Adjacencies and troubleshooting |
| Topic 9: BGP | - BGP basic operations and message types - EBGP and IBGP peer interactions - Attributes and path selection |
Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions:
1. You have traffic for a video streaming application traversing a GRE tunnel in your network and users are reporting poor performance. Both ends of the tunnel are using the default settings for a gigabit Ethernet interface, but you observe excessive packet drops due to exceeding the MTU.
Which two steps would you take to improve connectivity for this application? (Choose two.)
A) Route the GRE tunnel through a higher bandwidth link.
B) Increase the MTU for the member interfaces to 1500 bytes.
C) Increase the MTU for the member interfaces to 1524 bytes.
D) Configure the clear-dont-fragment option on the member interfaces.
2. You are deploying a trunk port with multiple VLANs. In this scenario, which statement is true about the native VLAN?
A) The native VLAN must be the default VLAN on the port.
B) The native VLAN is an untagged VLAN ID on the port.
C) The native VLAN is automatically configured through DHCP.
D) The native VLAN is the highest tagged VLAN ID on the port.
3. R1 was started at 4:00 PM. R2 and R3 were started at 6:00 PM. R4 was started at 10:00 PM. All routers are in Area 0 and there are no point-to-point links.
Referring to the exhibit, which router is the designated router?
A) R1
B) R3
C) R4
D) R2
4. A switch uses the factory-default storm control configuration. A sudden unknown-unicast burst causes packet loss for only 4-5 seconds before stabilizing. Which statement describes why normal operation resumes automatically?
A) Storm control triggers GRES recovery.
B) Storm control applies only to multicast traffic by default.
C) Storm control shuts down the interface and re-enables it after 5 seconds.
D) Storm control drops only excess packets until traffic falls below the threshold.
5. When electing a DIS in an IS-IS network, what is used to break a priority tie?
A) lowest router ID
B) highest router ID
C) highest MAC address
D) lowest MAC address
Solutions:
| Question # 1 Answer: C,D | Question # 2 Answer: B | Question # 3 Answer: A | Question # 4 Answer: D | Question # 5 Answer: C |




