A network engineer is troubleshooting a problem where traffic from the trust zone to the untrust zone is being dropped. The engineer has verified that the security policy permits the traffic and that the NAT rule is correctly configured. The engineer also notices that the traffic is being dropped at the ingress interface. What is the most likely cause?

The NAT rule is not matching the traffic.

The ingress interface is down or has a VLAN mismatch.

The security policy is denying the traffic.

What is the correct sequence of packet processing stages for a new session in a Juniper security device?

Policy lookup, session setup, forwarding decision

Session setup, forwarding decision, policy lookup

Forwarding decision, session setup, policy lookup

Session setup, policy lookup, forwarding decision

A network engineer is troubleshooting a performance issue on an SRX where legitimate traffic is being dropped. The engineer suspects that the session table is full. The engineer also notices that the SRX is configured with a high session limit, but the session table is still filling up quickly. The traffic consists of many short-lived TCP connections. What is the most effective way to reduce the rate at which the session table fills up?

Decrease the TCP session timeout.

Increase the session limit further.

Configure the SRX to use a stateless firewall filter for TCP traffic.

Disable the session table for TCP traffic.

A junior engineer is learning about the data flow on an SRX. They ask: 'For a new outbound connection from a host in the trust zone to a server in the untrust zone, what is the correct sequence of processing steps?' Which answer is accurate?

Ingress interface → egress interface → session setup (policy lookup) → forwarding decision

Session setup (policy lookup) → ingress interface → forwarding decision → egress interface

Ingress interface → forwarding decision → session setup (policy lookup) → egress interface

Ingress interface → session setup (policy lookup) → forwarding decision → egress interface

In the packet processing stages of a Juniper security device, what is the purpose of the policy lookup stage?

To apply NAT rules to the packet

To determine the next-hop IP address for the packet

To check whether the traffic matches a security policy and is allowed or denied

To create a session entry in the session table

Juniper NetworksCertified Specialist, Security (JNCIS-SEC)

Domain 5Objective 3

Data Flow JN0-336 Practice Questions (Page 1)

Part of the Identity-Aware Security Policies domain, which makes up ~12% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–7 in this domain), expect 1–2 from this objective — we provide 18 practice questions to prepare you well beyond it. (estimate)

18questions here

4free pages

6concepts

Questions 1–5

1expert · medium
A network engineer is troubleshooting a problem where traffic from the trust zone to the untrust zone is being dropped. The engineer has verified that the security policy permits the traffic and that the NAT rule is correctly configured. The engineer also notices that the traffic is being dropped at the ingress interface. What is the most likely cause?
Select an answer first
2foundation · easy
What is the correct sequence of packet processing stages for a new session in a Juniper security device?
Select an answer first
3expert · medium
A network engineer is troubleshooting a performance issue on an SRX where legitimate traffic is being dropped. The engineer suspects that the session table is full. The engineer also notices that the SRX is configured with a high session limit, but the session table is still filling up quickly. The traffic consists of many short-lived TCP connections. What is the most effective way to reduce the rate at which the session table fills up?
Select an answer first
4application · medium
A junior engineer is learning about the data flow on an SRX. They ask: 'For a new outbound connection from a host in the trust zone to a server in the untrust zone, what is the correct sequence of processing steps?' Which answer is accurate?
Select an answer first
5foundation · easy
In the packet processing stages of a Juniper security device, what is the purpose of the policy lookup stage?
Select an answer first

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Data Flow JN0-336 Practice Questions (Page 1)

Questions 1–5

What is the correct sequence of packet processing stages for a new session in a Juniper security device?

A junior engineer is learning about the data flow on an SRX. They ask: 'For a new outbound connection from a host in the trust zone to a server in the untrust zone, what is the correct sequence of processing steps?' Which answer is accurate?

In the packet processing stages of a Juniper security device, what is the purpose of the policy lookup stage?

Keep studying — Identity-Aware Security Policies