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Juniper JN0-330

JN0-330

Exam Code: JN0-330

Exam Name: JN0-330-Enhanced Services, Specialist(JNCIS-ES)

Updated: Aug 20, 2026

Q & A: 150 Questions and Answers

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Juniper JN0-330 Exam Syllabus Topics:

SectionObjectives
Topic 1: Enhanced Services Operations- View and analyze interface and security statistics
- Basic operational monitoring and troubleshooting
Topic 2: Security and Zone Configuration- SCREEN options and flood protection
- Security zones and policies
Topic 3: VPNs and Tunnels- Route-based VPNs
- IPsec and GRE/MLPPP configuration
Topic 4: Core Enhanced Services Concepts- JUNOS with Enhanced Services packet handling
- Session and flow inspection basics

Juniper JN0-330-Enhanced Services, Specialist(JNCIS-ES) Sample Questions:

1. What does a zone contain?

A) NAT addresses
B) interfaces
C) routing tables
D) routers


2. Click the Exhibit button.
Based on the exhibit, client PC 192.168.10.10 cannot ping 1.1.1.2.
Which is a potential cause for this problem?

A) No security policy exists for the ICMP reply packet from the untrust zone to the trust zone.
B) The untrust zone does not have a management policy configured.
C) The security policy from the trust zone to the untrust zone does not permit ping.
D) The trust zone does not have ping enabled as host-inbound-traffic service.


3. You must configure a SCREEN option that would protect your router from a session table flood.
Which configuration meets this requirement?

A) [edit security screen]
user@hostl# show
ids-option protectFromFlood {
tcp {
syn-flood {
attack-threshold 2000;
destination-threshold 2000;
}
B) [edit security screen]
user@hostl# show
ids-option protectFromFlood {
icmp {
ip-sweep threshold 5000;
flood threshold 2000;
}
C) [edit security screen]
user@hostl# show
ids-option protectFromFlood {
udp {
flood threshold 5000;
}
D) [edit security screen]
user@hostl# show
ids-option protectFromFlood {
limit-session {
source-ip-based 1200;
destination-ip-based 1200;
}


4. Which parameters must you select when configuring operating system probes SCREEN options?

A) syn-fin, syn-flood, and tcp-no-frag
B) syn-fin, syn-ack-ack-proxy, and tcp-no-frag
C) syn-fin, port-scan, and tcp-no-flag
D) syn-fin, fin-no-ack, and tcp-no-frag


5. Which statement is true about source NAT?

A) Source NAT does not require a security policy to function.
B) The egress interface IP address can be used for source NAT.
C) Destination NAT is required to translate the reply traffic.
D) Source NAT works only with source pools.


Solutions:

Question # 1
Answer: B
Question # 2
Answer: C
Question # 3
Answer: D
Question # 4
Answer: D
Question # 5
Answer: B

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