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

Exam Code: JN0-330

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

Updated: Aug 27, 2026

Q & A: 150 Questions and Answers

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Juniper JN0-330 Exam Syllabus Topics:

SectionObjectives
Topic 1: Security Services Configuration- Application identification and filtering
- Security zones and policies
- Stateful firewall concepts
Topic 2: Routing and Service Integration- Routing instances and policy-based routing
- Service integration with routing policies
Topic 3: Network Address Translation (NAT)- Static NAT and NAT troubleshooting
- Source NAT and destination NAT
Topic 4: Junos Platform Fundamentals for Services- Junos OS architecture and services processing
- Interface types and service handling behavior
Topic 5: VPN Technologies- IPsec VPN fundamentals
- Site-to-site VPN configuration
Topic 6: Troubleshooting and Monitoring- Logs, traceoptions, and debugging tools
- Traffic flow analysis

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

Question 1

Which configuration shows a source NAT pool with no-port-translation?

A. [edit security nat]
user@host# show
interface ge-0/0/0.0 {
source-nat {
pool pool-1 {
address-range {
low 1.1.1.10 high 1.1.1.14;
}
no-port-translation;
}
B. [edit security nat]
user@host# show
source-nat {
pool pool-1 {
address-range {
low 1.1.1.10 high 1.1.1.14;
}
no-port-translation;
}
C. [edit security nat]
user@host# show
interface ge-0/0/0.0 {
source-nat {
pool pool-1 {
address-range {
low 1.1.1.10 high 1.1.1.14 no-port-translation;
}
D. [edit security nat]
user@host# show
source-nat {
pool pool-1 {
address-range {
low 1.1.1.10 high 1.1.1.14 no-port-translation;
}


Question 2

Which two statements about OSPF are correct? (Choose two.)

A. The OSPF backbone area contains all routes, while other OSPF areas contain only summary routes.
B. OSPF stub areas do not have any Type 5 LSAs, while totally stubby areas do not have any Type 5, 3, and 4 LSAs.
C. OSPF not-so-stubby areas do not have any Type 5 LSAs, while the backbone area contains Type 7 LSAs.
D. The OSPF backbone area contains Type 5 LSAs, while not-so-stubby areas contain Type 7 LSAs.


Question 3

You want to create a static default route to gateway 192.168.1.1 on interface ge-0/0/0.0.
Which command will accomplish this task?

A. set routing-options route 0.0.0.0/0 interface ge-0/0/0.0 next-hop 192.168.1.1
B. set routing-options static route 0.0.0.0/0 interface ge-0/0/0.0 gateway 192.168.1.1
C. set routing-options routes static 0.0.0.0/0 next-hop 192.168.1.1
D. set routing-options static route 0.0.0.0/0 next-hop 192.168.1.1


Question 4

Click the Exhibit button.
A host attached to interface ge-0/0/0.0 has an open Telnet session to a host attached to interface ge-0/0/3.0. After the session times out of the router's session table, the host attached to interface ge-0/0/0.0 sends another data packet through the existing TCP session.
What will occur?

A. The router will send a TCP reset to the host attached to interface ge-0/0/3.0.
B. The router will send a TCP reset to the host attached to interface ge-0/0/0.0.
C. The router will forward the packet out the ge-0/0/3.0 interface.
D. The router will silently discard the packet.


Question 5

What are two uses of NAT? (Choose two.)

A. allowing networks with overlapping private address space to communicate
B. preventing unauthorized connections from outside the network
C. allowing stateful packet inspection
D. conserving public IP addresses


Solutions:

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

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