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Juniper JN0-650 Exam Syllabus Topics:

Topic	Details
Topic 1	BGP: This section focuses on Border Gateway Protocol operations including route selection, next hop resolution, BGP attributes, communities, load balancing, IPv4 IPv6 address families, advanced options, and routing policy implementation.
Topic 2	IP Telephony Features: This section focuses on features supporting VoIP deployments including Power over Ethernet, LLDP LLDP-MED protocols, and voice VLAN implementation.
Topic 3	Layer 2 Authentication and Access Control: This domain examines network access control mechanisms including 802.1x, MAC RADIUS, captive portal, server fail fallback, guest VLANs, and multi-method authentication considerations.
Topic 4	Ethernet Switching and Spanning Tree: This section covers advanced Layer 2 switching including filter-based VLANs, private VLANs, MVRP, Layer 2 tunneling via Q-in-Q and L2PT, plus MSTP and VSTP protocols.
Topic 5	Class of Service (CoS): This domain covers QoS mechanisms in Junos including CoS processing, header fields, forwarding classes, classification, policers, schedulers, drop profiles, shaping, and rewrite rules.
Topic 6	EVPN: This section addresses Ethernet VPN technology for Layer 2 over Layer 3 connectivity, covering EVPN route types, VXLAN encapsulation, and multi-homing configurations.

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Juniper Enterprise Routing and Switching, Professional (JNCIP-ENT) Sample Questions (Q76-Q81):

NEW QUESTION # 76
You are designing traffic classification for your network and must decide between using behavior aggregate (BA) classifiers or multifield (MF) classifiers for critical network traffic. In this scenario, which two statements are correct? (Choose two.)

A. BA classifiers match on multiple header fields including IP address and port numbers.
B. When both classifiers are configured, BA classification always overrides any MF classification.
C. BA classifiers are more efficient because they rely on packet header fields such as DSCP or
802.1P.
D. MF classifiers use firewall filters to match multiple packet header fields.

Answer: C,D

Explanation:
Multifield classifiers use firewall filter logic to examine and classify traffic based on multiple packet header fields such as addresses, ports, and protocols.
Behavior aggregate classifiers are more efficient because they classify traffic using existing packet markings such as DSCP or IEEE 802.1p bits rather than performing deep packet inspection across multiple fields.

NEW QUESTION # 77
Which of the following is NOT a function of OSPFv3?

A. Supports IPv6 networking
B. Advertises routes using BGP
C. Utilizes LSA types that are different from OSPFv2
D. Employs both intra-area and inter-area routing

Answer: B

NEW QUESTION # 78
Exhibit

You are receiving the 203 0.113.0/24 route from both upstream ISPs You are asked to ensure that ISP A is the preferred ISP for traffic being sent to the 203.0.113.0/24 network from devices in AS 65512.
Referring to the exhibit, which two statements will accomplish this behavior? (Choose two.)

A. You should assign a local preference that is higher than 100 for the route learned from ISP B.
B. You should assign a local preference that is lower than 100 for the route learned from ISP A.
C. You should assign a local preference that is higher than 100 for the route learned from ISP A.
D. You should assign a local preference that is lower than 100 for the route learned from ISP B.

Answer: C,D

Explanation:
The exhibit illustrates an Autonomous System (AS 65512) receiving the same prefix ($203.0.113.0/24$) from two different neighbors, ISP A and ISP B. To influence outbound traffic from AS 65512 so that ISP A is preferred, you must manipulate the BGP Local Preference attribute.BGP Path Selection and Local Preference:
Local preference is the first attribute evaluated by BGP after checking if the next hop is reachable. A higher local preference value is always preferred over a lower one. The default value in Junos OS is 100.Applying the Preference (Option B): By applying an import policy on router R1 to set a local preference higher than
100 (e.g., 200) for routes from ISP A, R1, R2, and R3 will all prefer the path through R1 to reach ISP A.
Applying the Preference (Option C): Alternatively, you can achieve the same result by applying an import policy on R2 to set a local preference lower than 100 (e.g., 50) for routes from ISP B. Since the routes from R1 remain at the default of 100, the path through ISP A (100) will be preferred over ISP B (50).Why A and D are incorrect: Setting a lower preference for ISP A (Option A) or a higher preference for ISP B (Option D) would result in ISP B being preferred for outbound traffic, which is the opposite of the requirement.

NEW QUESTION # 79
Which two statements are correct about EVPN/VXLAN deployments? (Choose two.)

A. VTEPs are used for encapsulating and de-encapsulating traffic entering and leaving the tunnels.
B. VNIs are used for encapsulating and de-encapsulating traffic entering and leaving the tunnels
C. VNIs are used to identify broadcast domains within an EVPN/VXLAN environment.
D. VTEPs are used to identify broadcast domains within an EVPN/VXLAN environment.

Answer: A,C

Explanation:
In an EVPN-VXLAN architecture, the interaction between the control plane (EVPN) and the data plane (VXLAN) is defined by specific functional components:
VTEP (VXLAN Tunnel End Point): These are the entities responsible for the encapsulation and de- encapsulation of Layer 2 Ethernet frames into Layer 3 UDP/IP packets. A VTEP can be a physical switch (like a QFX or EX series) or a software-based entity. When traffic enters the fabric, the ingress VTEP wraps it in a VXLAN header; the egress VTEP removes this header before delivering it to the destination host. (Option B) VNI (Virtual Network Identifier): The VNI is a 24-bit field in the VXLAN header that allows for up to 16 million unique identifiers. It is used to identify specific broadcast domains (or VLANs) within the overlay network. Each VNI effectively represents a virtualized Layer 2 segment that is stretched across the Layer 3 underlay. (Option D) Incorrect statements: Option A is incorrect because VNIs are identifiers, not the " engine " that performs encapsulation-that is the VTEP ' s job. Option C is incorrect because VTEPs identify the endpoints of a tunnel, not the individual broadcast domains themselves.

NEW QUESTION # 80
Which two statements are true regarding BGP peering sessions? (Choose two.)

A. BGP keepalives consist of a BGP header and a notification message.
B. BGP keepalives consist of a BGP header with no payload.
C. BGP updates are registered as keepalives.
D. BGP uses keepalive messages to maintain the session state in the absence of updates.

Answer: B,D

NEW QUESTION # 81
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