Valid JN0-352 Test Book | Valid Juniper Exam JN0-352 Score: Enterprise Routing and Switching, Specialist (JNCIS-ENT)

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Juniper JN0-352 Exam Syllabus Topics:

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

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Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions (Q101-Q106):

NEW QUESTION # 101
Which two statements describe the purpose of a BGP notification message? (Choose two.)

Answer: B,C

Explanation:
A BGP NOTIFICATION message is one of the four core message types defined in RFC 4271, alongside OPEN, UPDATE, and KEEPALIVE, and it serves a very specific and narrow purpose within the protocol: whenever a BGP speaker detects an unrecoverable, fatal condition in the session -- such as a malformed OPEN message, an unsupported capability, a hold-timer expiration, a finite-state-machine error, or an administratively initiated reset -- it transmits a NOTIFICATION message to its peer immediately before closing the underlying TCP connection and tearing down the session entirely. This confirms that a NOTIFICATION always signals the termination of the session upon a fatal error, never a routine, in-session update. Structurally, every NOTIFICATION message carries a defined error code and error subcode field, which together precisely classify the category and specific nature of the fault that triggered the termination (for example, 'Cease' with a subcode indicating administrative shutdown, or 'Update Message Error' with a subcode indicating a malformed attribute), giving the receiving peer's administrator concrete diagnostic information about exactly why the session was torn down.
Updating route attributes while keeping a session alive is the role of the UPDATE message, not NOTIFICATION, and refreshing a neighbor's table without resetting the session describes the optional Route Refresh capability (a separate, distinct BGP mechanism), neither of which describes NOTIFICATION's function.


NEW QUESTION # 102
Which two types of tunnels are able to be created on all Junos devices? (Choose two.)

Answer: A,C

Explanation:
GRE tunnels can be created on all Junos devices. GRE is a tunneling protocol that encapsulates a wide variety of network layer protocols inside virtual point-to-point links.
IP-IP tunnels can also be created on all Junos devices. IP-IP tunneling is used to encapsulate IP packets within IP packets, providing a simple way to tunnel IP traffic.


NEW QUESTION # 103
Which statement is true about Layer 2 firewall filters on EX Series switches?

Answer: B


NEW QUESTION # 104
You are establishing a new BGP session to an EBGP peer using loopback addresses.
In addition to your general EBGP settings, which BGP feature must be enabled for this session to establish?

Answer: B

Explanation:
By default, EBGP sessions are built with the expectation that peers are directly connected at Layer 3, and Junos enforces this by sending EBGP packets with a TTL of 1. When loopback addresses are used as the session endpoints instead of the directly connected physical interface addresses, the resulting IP packets must traverse at least one additional router hop between the two loopbacks, and a TTL of 1 will expire in transit before reaching the remote loopback, causing the TCP handshake - and therefore the BGP session - to fail even though a valid route to the peer's loopback exists. The multihop statement (configured as an EBGP multihop parameter with an accompanying TTL value, most commonly set to 2 for a single intermediate hop) instructs Junos to increase the TTL used for that peer's BGP packets so they survive the extra hop count between loopbacks. This is a mandatory addition any time an EBGP session is deliberately built against non- directly-connected addresses, whereas IBGP sessions, by contrast, do not have this default restriction because IBGP already assumes peers may be multiple hops apart within the same AS. Multipath affects load-balancing across equal-cost paths, damping suppresses flapping routes, and passive controls whether a router waits for the remote peer to initiate the TCP connection - none of these resolve the TTL expiration problem inherent to loopback-based EBGP peering. Reference topics: Junos Enterprise Routing - BGP, Configuring EBGP Multihop Sessions.


NEW QUESTION # 105
Which two statements are correct about VRRP? (Choose two.)

Answer: A,D

Explanation:
The virtual IP address must match on all participating devices - All routers in the same VRRP group must be configured with the same virtual IP address to provide redundancy.
The VRRP group number must match on all participating devices - All routers in the same VRRP group must have the same group number to identify the VRRP group.


NEW QUESTION # 106
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