Juniper JN0-331 : SEC,Specialist(JNCIS-SEC)

  • Exam Code: JN0-331
  • Exam Name: SEC,Specialist(JNCIS-SEC)
  • Updated: Jul 17, 2026     Q & A: 131 Questions and Answers

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Juniper JN0-331 Exam Syllabus Topics:

SectionObjectives
Virtual Private Networks- IPsec VPN
  • 1. IKE and IPsec fundamentals
  • 2. Site-to-site VPN configuration
Network Address Translation- Source NAT
  • 1. Interface NAT
  • 2. Static and dynamic source NAT
- Destination and Static NAT
  • 1. Static NAT
  • 2. Destination NAT
High Availability and Troubleshooting- Chassis cluster
  • 1. Failover operations
  • 2. Redundancy groups
- Monitoring and troubleshooting
  • 1. Operational commands
  • 2. Log analysis and diagnostics
Security Fundamentals- Junos security architecture
  • 1. Security processing flow
  • 2. SRX platform overview
- Security concepts
  • 1. Threats and mitigation techniques
  • 2. Network security principles
Application Security Features- User and application awareness
  • 1. AppSecure concepts
  • 2. Application identification
- Unified Threat Management
  • 1. Content filtering and antivirus
  • 2. UTM features
Zones and Security Policies- Security zones
  • 1. Zone configuration
  • 2. Host inbound traffic
- Security policies
  • 1. Policy creation and evaluation
  • 2. Policy troubleshooting

Juniper SEC,Specialist(JNCIS-SEC) Sample Questions:

1. Which two traffic types trigger pass-through firewall user authentication? (Choose two.)

A) ICMP
B) OSPF
C) HTTP
D) SSH
E) Telnet


2. Which two external authentication server types are supported by JUNOS Software for firewall user authentication? (Choose two.)

A) RADIUS
B) TACACS+
C) LDAP
D) IIS


3. Your task is to provision the JUNOS security platform to permit transit packets from the
Private zone to the External zone by using an IPsec VPN and log information at the time of
session close.
Which configuration meets this requirement?

A) [edit security policies from-zone Private to-zone External]
user@host# show
policy allowTransit {
match {
source-address PrivateHosts;
destination-address ExtServers;
application ExtApps;
}
then {
permit {
tunnel {
ipsec-vpn VPN;
}}
log {
session-close;
}}}
B) [edit security policies from-zone Private to-zone External]
user@host# show
policy allowTransit {
match {
source-address PrivateHosts;
destination-address ExtServers;
application ExtApps;
}
then {
permit {
tunnel {
ipsec-vpn VPN;
log;
count session-close;
}}}}
C) [edit security policies from-zone Private to-zone External]
user@host# show
policy allowTransit {
match {
source-address PrivateHosts;
destination-address ExtServers;
application ExtApps;
}
then {
permit {
tunnel {
ipsec-vpn VPN;
}}
count {
session-close;
}}}
D) [edit security policies from-zone Private to-zone External]
user@host# show
policy allowTransit {
match {
source-address PrivateHosts;
destination-address ExtServers;
application ExtApps;
}
then {
permit {
tunnel {
ipsec-vpn VPN;
}
}
log {
session-init;
}}}


4. Which three security concerns can be addressed by a tunnel mode IPsec VPN secured by AH? (Choose three.)

A) data authentication
B) outer IP header confidentiality
C) data confidentiality
D) outer IP header authentication
E) data integrity


5. 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
from the TRUST zone to the UNTRUST zone.
Which configuration would correctly accomplish this task?

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


Solutions:

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

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