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

JN0-330 pass collection

Exam Code: JN0-330

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

Updated: Jul 19, 2026

Q & A: 150 Questions and Answers

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Juniper JN0-330 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Class of Service (CoS)15%- Scheduling, shaping, and congestion management
- Classification, marking, and queuing
Topic 2: Multicast Protocols10%- PIM, IGMP concepts and configuration
Topic 3: Junos OS Fundamentals20%- Junos architecture and packet processing
- Configuration management and operations
Topic 4: Firewall Filters and policers20%- Filter structure, match conditions, and actions
- Policers and traffic rate limiting
Topic 5: High Availability and Services5%- Graceful restart and nonstop routing
Topic 6: IPsec and VPN Services15%- IPsec VPN concepts and configuration
- VPN monitoring and troubleshooting
Topic 7: Network Address Translation (NAT)15%- NAT rules and troubleshooting
- Source NAT, Destination NAT, Static NAT

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

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

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


2. What is the purpose of a zone in the JUNOS software with enhanced services?

A) A zone defines a group of network segments with similar class-of-service requirements.
B) A zone defines the geographic region in which the router is deployed.
C) A zone defines a group of network segments with similar security requirements.
D) A zone defines a group of routers with a common management.


3. A network administrator wants to permit Telnet traffic initiated from the address book entry the10net in a zone called UNTRUST to the address book entry Server in a zone called TRUST. However, the administrator does not want the server to be able to initiate any type of traffic to the UNTRUST zone. NAT is not required.
Which configuration statement is correct to accomplish this task?

A) from-zone UNTRUST to-zone TRUST {
policy DenyServer {
match {
source-address any;
destination-address any;
application any;
}
then {
deny;
}
from-zone TRUST to-zone UNTRUST {
policy AllowTelnetin {
match {
source-address the10net;
destination-address Server;
application junos-telnet;
}
then {
permit;
}
B) from-zone TRUST to-zone UNTRUST {
policy DenyServer {
match {
source-address Server;
destination-address any;
application any;
}
then {
permit;
}
from-zone UNTRUST to-zone TRUST {
policy AllowTelnetin {
match {
source-address the10net;
destination-address Server;
application junos-telnet;
}
then {
permit;
}
C) from-zone UNTRUST to-zone TRUST {
policy AllowTelnetin {
match {
source-address the10net;
destination-address Server;
application junos-ftp;
}
then {
permit;
}
D) from-zone TRUST to-zone UNTRUST {
policy DenyServer {
match {
source-address Server;
destination-address any;
application any;
}
then {
deny;
}
from-zone UNTRUST to-zone TRUST {
policy AllowTelnetin {
match {
source-address the10net;
destination-address Server;
application junos-telnet;
}
then {
permit;
}


4. Click the Exhibit button. In the exhibit, which two statements accurately describe the information about the interface se-1/0/1.605? (Choose two.)

A) The interface's IP address is 172.18.36.9.
B) The interface se-1/0/1.605 belongs to trust zone and is connected to the Frame Relay network.
C) The interface se-1/0/1.605 allows only host-inbound traffic identified in the command output; no other traffic can transit the interface.
D) The interface's IP address is 192.18.36.11.


5. Using a policy with the policy-rematch flag enabled, what happens to the existing and new sessions when you change the policy action from permit to deny?

A) The new sessions matching the policy are denied. The existing sessions are dropped.
B) The new sessions matching the policy are denied. The existing sessions continue until they are completed or their timeout is reached.
C) The new sessions matching the policy might be allowed through if they match another policy. The existing sessions are dropped.
D) The new sessions matching the policy are denied. The existing sessions, not being allowed to carry any traffic, simply timeout.


Solutions:

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

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