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| Section | Objectives |
|---|---|
| Topic 1: Security Fundamentals | - Network security concepts
|
| Topic 2: Security Policies and NAT | - Network Address Translation
|
| Topic 3: Security Services and Monitoring | - Security services overview
|
| Topic 4: VPN and Secure Connectivity | - IPsec VPN fundamentals
|
| Topic 5: Juniper SRX Platform Basics | - Junos security architecture
|
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NEW QUESTION # 111
You are not able to ping an interface on an SRX Series Firewall.
Which two actions should you take to solve this issue? (Choose two.)
Answer: A,B
Explanation:
For an SRX firewall interface to respond to management traffic such as ICMP pings:
The interface must be assigned to a security zone (Option A). If an interface is not part of any zone, it is placed into the null zone, which drops all traffic.
Additionally, the zone must be configured to allow management traffic types as host-inbound-traffic (Option D). For ICMP, the protocol must be explicitly allowed under host-inbound-traffic for that zone.
Other options:
Security policies (Option B) control traffic traversing the firewall, not traffic destined to the SRX device itself.
Assigning the interface to the null zone (Option C) prevents any communication, including management.
Correct Actions: Assign the interface to a zone and configure ICMP under host-inbound-traffic.
NEW QUESTION # 112
You are modifying the NAT rule order and you notice that a new NAT rule has been added to the bottom of the list.
In this situation, which command would you use to reorder NAT rules?
Answer: C
Explanation:
In Junos OS, NAT rules are evaluated intop-down order. When a new rule is added, it is placed at thebottom of the rule set by default.
* To move a rule to the top of the rule set, the command is:
* set security nat source rule-set <name> rule <rule-name> top
* Option A (top):Correct. Moves the specified rule to the top of the list.
* Option B (run):Used to execute operational commands, not rule reordering.
* Option C (up):Not valid for reordering NAT rules.
* Option D (insert):Not a supported NAT reordering command in Junos.
Correct Command:top
Reference:Juniper Networks -NAT Rule Evaluation Order and Rule Reordering, Junos OS Security Fundamentals.
NEW QUESTION # 113
Which statement about the flow module is correct in the context of destination NAT?
Answer: A
Explanation:
In SRX flow-based processing, the first packet of a new session goes through first path processing, where NAT rule lookup, route lookup, security policy evaluation, and session creation occur. Destination NAT is performed before security policy evaluation, so the translated destination address is used when matching the policy. After the session is created, later packets use fast path processing and follow the cached session information, including the NAT translation state created for the session. Therefore, the flow module is involved with NAT behavior in both first path and fast path processing. Option B is incorrect because destination NAT changes destination addresses, not only source addresses. Options C and D are incomplete because NAT lookup and session installation occur during first path, while established NAT translations are applied during fast path.
NEW QUESTION # 114
Click the Exhibit button.
Which security policy component is highlighted in the exhibit?
Answer: B
Explanation:
The highlighted portion in the exhibit is:
then {
permit;
}
In Junos OS security policy configuration, the then statement defines the policy action. The action tells the SRX Series Firewall what to do with traffic after it matches the policy conditions.
A security policy normally contains these major components:
Zone context: from-zone Trust to-zone Untrust
Policy name: policy Permit-HTTP
Match criteria: source address, destination address, and application
Policy action: then permit, then deny, or then reject
In the exhibit, the highlighted section is not the zone context, policy name, or match criteria. It is the action section that permits the matched HTTP traffic.
NEW QUESTION # 115
When does screening occur on an SRX Series Firewall for an ingress traffic flow?
Answer: D
Explanation:
On an SRX Series Firewall, screening (such as SYN flood protection or IP spoofing checks) occurs after the route lookup but before security policy evaluation. This ensures that the system knows the correct path for the packet and can apply screen options on the ingress zone before allowing the traffic to continue through policy checks.
NEW QUESTION # 116
......
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