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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Security Policies | 20% | - Unified security policies - Global policies - Policy rules and actions - Zone-based policies |
| Topic 2: SRX Series Service Gateways | 20% | - Initial configuration - Traffic flow and security processing - Hardware components - J-Web management interface - Interfaces - General Junos architecture - Juniper vSRX Virtual Firewall |
| Topic 3: Junos OS Security Objects | 20% | - Address objects and address sets - Security zones - Application objects and ALGs - Screens and security profiles |
| Topic 4: Monitoring, Reporting and Troubleshooting | 10% | - Security policy monitoring - Traffic flow verification - Log and event management - Troubleshooting common issues |
| Topic 5: Content Security | 15% | - Antivirus protection - Web filtering - Antispam filtering - Content filtering |
| Topic 6: Network Address Translation | 15% | - Destination NAT - Source NAT - Static NAT - NAT pools and rules |
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質問 # 24
Which two statements are correct about unified security policies? (Choose two.)
正解:A、B
解説:
Unified security policies (USPs) provide integrated application-aware controls using AppID and extend traditional zone-based policy enforcement.
Option A: Correct. If traffic matches a unified security policy, it is not re-evaluated by traditional security policies. Unified policies take precedence for matched flows.
Option B: Incorrect. Traditional policies rely on Layer 3/4 attributes. Unified policies go deeper by leveraging AppID, which inspects traffic up to Layer 7.
Option C: Incorrect. Traffic matching a traditional policy is unaffected by unified policy unless unified mode is explicitly configured for those flows.
Option D: Correct. Dynamic application recognition in unified policies uses Layer 7 (application-layer) inspection via AppID.
Correct Statements: A and D
質問 # 25
Which two statements about global security policies are correct? (Choose two.)
正解:A、D
解説:
Global security policies extend the flexibility of policy enforcement across the SRX. They are not tied to specific source and destination zones:
* From-zone and to-zone contexts are not required(Option A). Global policies apply across all zones unless restricted by match conditions.
* Global security policies do not require specific zone contexts(Option B is incorrect).
* Global policies areprocessed after zone-based policies, not before. This means that zone-based security policies take precedence (Option C is incorrect).
* Administrators can configure bothzone-based security policies and global security policies at the same timeon the same device (Option D is correct).
This allows flexible designs where specific policies can be enforced by zone, while general policies can be applied globally without duplicating rules across multiple zones.
Reference:Juniper Networks -Junos OS Security Fundamentals, Global Security Policies.
質問 # 26
You have created a series of security policies permitting access to a variety of services. You now want to create a policy that blocks access to all other services for all user groups.
What should you create in this scenario?
正解:B
解説:
To enforce acatch-all blocking policyafter other specific policies, the correct solution is aglobal security policy (Option A).
* Global policiescan apply universally across zones, and an administrator can configure a final "deny all" rule to block any unmatched traffic.
* ATP policy (Option B):Protects against advanced threats, not used for catch-all rule enforcement.
* IDP policy (Option C):Focuses on intrusion detection and prevention signatures, not general traffic blocking.
* Integrated user firewall policy (Option D):Applies policies based on user identity, but it does not provide a universal block across all services.
Correct Solution:Global security policy
Reference:Juniper Networks -Global Security Policies, Junos OS Security Fundamentals.
質問 # 27
What are two valid security address objects within Juniper Networks? (Choose two.)
正解:A、B
解説:
Global address objects are defined at the global level and can be referenced by any security zone or policy.
Prefix address objects define IP subnets (for example, 192.168.1.0/24) and are commonly used in security policies to match source or destination traffic.
質問 # 28
On SRX Series Firewalls, which type of NAT is bidirectional?
正解:A
解説:
Static NAT is bidirectional on SRX Series Firewalls. It creates a fixed one-to-one translation between an original address and a translated address, allowing sessions to be initiated from either side of the gateway. Destination NAT, by contrast, allows inbound access to internal resources but is not inherently bidirectional in the same way. Source NAT translates the source address for outbound connections, commonly allowing private hosts to access public networks, and return traffic is handled by the session table. Source NAT without PAT still does not provide the automatic reverse mapping behavior of static NAT. Juniper documentation notes that static NAT mappings allow connections to be established from either side, which makes static NAT the correct answer.
質問 # 29
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