You are connecting two remote sites to your corporate headquarters site. You must ensure that traffic passes through the corporate headquarters. In this scenario, the VPN that should be used is:

D. Hub-and-spoke IPsec VPN with the corporate firewall acting as the hub device. A hub-and-spoke IPsec VPN is a type of VPN that connects multiple remote sites to a central site, or hub, over a public network. The hub site acts as a gateway for the remote sites and provides security and routing services. The remote sites, or spokes, communicate with each other through the hub site. The hub site and the spoke sites use IPsec tunnels to encrypt and authenticate the traffic between them. A hub-and-spoke IPsec VPN is suitable for connecting two remote sites to your corporate headquarters site, because it allows you to control the traffic flow and enforce security policies at the hub site.  The corporate firewall can act as the hub device and provide IPsec VPN services to the remote sites 1 .

The other options are incorrect because:

A. Full mesh IPsec VPNs with tunnels between all sites. A full mesh IPsec VPN is a type of VPN that connects every site to every other site over a public network. Each site has an IPsec tunnel with every other site, forming a mesh topology. A full mesh IPsec VPN provides direct and secure communication between any pair of sites, but it also requires a large number of IPsec tunnels and complex configuration.  A full mesh IPsec VPN is not suitable for connecting two remote sites to your corporate headquarters site, because it does not ensure that traffic passes through the corporate headquarters site, and it may introduce unnecessary overhead and complexity 2 .

B. A full mesh Layer 3 VPN with the BGP route reflector behind the corporate firewall device. A full mesh Layer 3 VPN is a type of VPN that uses MPLS and BGP to provide Layer 3 connectivity and routing between multiple sites over a service provider’s network. Each site has a BGP session with every other site, forming a full mesh topology. A BGP route reflector is a device that reduces the number of BGP sessions required in a full mesh topology by reflecting routes between its clients.  A full mesh Layer 3 VPN with the BGP route reflector behind the corporate firewall device is not suitable for connecting two remote sites to your corporate headquarters site, because it does not ensure that traffic passes through the corporate firewall device, and it may require additional configuration and coordination with the service provider 3 .

C. A Layer 3 VPN with the corporate firewall acting as the hub device. A Layer 3 VPN is a type of VPN that uses MPLS and BGP to provide Layer 3 connectivity and routing between multiple sites over a service provider’s network. A Layer 3 VPN can have different topologies, such as full mesh, hub-and-spoke, or partial mesh.  A Layer 3 VPN with the corporate firewall acting as the hub device is not suitable for connecting two remote sites to your corporate headquarters site, because the corporate firewall may not support MPLS and BGP, and it may require additional configuration and coordination with the service provider 3 .

References:

Hub-and-Spoke VPNs Overview

Full Mesh VPNs Overview

Layer 3 VPNs Overview

In transparent mode, all interfaces involved are configured with the bridge protocol family. This allows the SRX device to act as a bridge between the interfaces and forward traffic transparently without any modification. The bridge interfaces can be configured to forward traffic based on layer 2 headers, such as MAC addresses, without the need for routing or IP addressing.

Referring to the exhibit, your company’s infrastructure team implemented new printers. To make sure that the policy enforcer pushes the updated IP address list to the SRX, you need to perform the following actions:

A. Configure the server feed URL as http://172.25.10.254/myprinters. The server feed URL is the address of the remote server that provides the custom feed data. You need to configure the server feed URL to match the location of the file that contains the IP addresses of the new printers.  In this case, the file name is myprinters and the server IP address is 172.25.10.254, so the server feed URL should be http://172.25.10.254/myprinters 1 .

B. Create a security policy that uses the dynamic address feed to allow access. A security policy is a rule that defines the action to be taken for the traffic that matches the specified criteria, such as source and destination addresses, zones, protocols, ports, and applications. You need to create a security policy that uses the dynamic address feed as the source or destination address to allow access to the new printers. A dynamic address feed is a custom feed that contains a group of IP addresses that can be entered manually or imported from external sources.  The dynamic address feed can be used in security policies to either deny or allow traffic based on either source or destination IP criteria 2 .

C. Configure Security Director to create a dynamic address feed. Security Director is a Junos Space application that enables you to create and manage security policies and objects. You need to configure Security Director to create a dynamic address feed that contains the IP addresses of the new printers. You can create a dynamic address feed by using the local file or the remote file server option.  In this case, you should use the remote file server option and specify the server feed URL as http://172.25.10.254/myprinters 3 .

The other options are incorrect because:

D. Configuring Security Director to create a C & C feed is not required to complete the requirement. A C & C feed is a security intelligence feed that contains the IP addresses of servers that are used by malware or attackers to communicate with infected hosts. The C & C feed is not related to the new printers or the dynamic address feed.

E. Configuring the server feed URL as https://172.25.10.254/myprinters is not required to complete the requirement. The server feed URL can use either the HTTP or the HTTPS protocol, depending on the configuration of the remote server.  In this case, the exhibit shows that the remote server is using the HTTP protocol, so the server feed URL should use the same protocol 1 .

References:

Configuring the Server Feed URL

Dynamic Address Overview

Creating Custom Feeds

[Command and Control Feed Overview]

Referring to the exhibit, the following statements are correct:

B. All of the entries are command and control entries. Command and control entries are dynamic addresses that represent the IP addresses of servers that are used by malware to communicate with infected hosts. The SRX Series device can block or log the traffic to or from these IP addresses based on the security policies.  The exhibit shows that all of the entries have the category DC/1, which stands for command and control 1 .

C. All of the entries are Dshield entries. Dshield is a feed source that provides a list of IP addresses that are associated with malicious activities, such as scanning, spamming, or attacking. The SRX Series device can download the Dshield feed and use it to populate the dynamic address entries.  The exhibit shows that all of the entries have the feed dshield, which indicates that they are from the Dshield feed source 2 .

The other statements are incorrect because:

A. All of the entries are not a threat level 8, but a threat level 10. The threat level is a numeric value that indicates the severity of the threat associated with a dynamic address entry. The higher the threat level, the more dangerous the threat. The SRX Series device can use the threat level to prioritize the actions for the dynamic address entries. The exhibit shows that all of the entries have the cc CN, which stands for country code China. According to the Juniper documentation, the country code China has a threat level of 10, which is the highest.

D. All of the entries are not a threat level 10, but they are. See the explanation for option A.

References:

Understanding Dynamic Address Categories

Understanding Dynamic Address Feed Sources

[Understanding Dynamic Address Threat Levels]

To modify the configuration to fulfill the requirements, you need to modify the log-all term to add the next term action. The other options are incorrect because:

B. Deleting the log-all term would prevent logging all traffic, which is one of the requirements.  The log-all term matches all traffic from any source address and logs it to the system log file 1 .

C. Adding a term before the log-all term that blocks Telnet would also prevent logging all traffic, because the log-all term would never be reached. The firewall filter evaluates the terms in sequential order and applies the first matching term.  If a term before the log-all term blocks Telnet, then the log-all term would not match any traffic and no logging would occur 2 .

D. Applying a firewall filter to the loopback interface that blocks Telnet traffic would not block inbound Telnet traffic on interface ge-0/0/3, which is another requirement. The loopback interface is a logical interface that is always up and reachable.  It is used for routing and management purposes, not for filtering traffic on physical interfaces 3 .

Therefore, the correct answer is A. You need to modify the log-all term to add the next term action. The next term action instructs the firewall filter to continue evaluating the subsequent terms after matching the current term.  This way, the log-all term would log all traffic and then proceed to the block-telnet term, which would block only inbound Telnet traffic on interface ge-0/0/3 4 . To modify the log-all term to add the next term action, you need to perform the following steps:

Enter the configuration mode: user@host > configure

Navigate to the firewall filter hierarchy: user@host# edit firewall family inet filter block-telnet

Add the next term action to the log-all term: user@host# set term log-all then next term

Commit the changes: user@host# commit

References:

log (Firewall Filter Action)

Firewall Filter Configuration Overview

loopback (Interfaces)

next term (Firewall Filter Action)

https://kb.juniper.net/InfoCenter/index?page=content & id=KB30443 & cat=SRX_SERIES & actp=LIST

You must set up a DDoS solution for your ISP. The solution must be agile and not block legitimate traffic. The two products that will accomplish this task are:

B. MX Series device. MX Series devices are high-performance routers that can provide DDoS protection at the network edge by integrating with Corero SmartWall Threat Defense Director (TDD) software. MX Series devices can leverage the packet processing capabilities of the MX-SPC3 Services Card to perform real-time DDoS detection and mitigation at line rate, scaling from 50 Gbps to 40 Tbps. MX Series devices can also use Juniper Networks Security Intelligence (SecIntel) to receive threat intelligence feeds from Juniper ATP Cloud or Juniper Threat Labs and apply them to the security policies.  MX Series devices can provide an agile and effective DDoS solution for your ISP without blocking legitimate traffic 1 2 .

C. Corero SmartWall TDD. Corero SmartWall TDD is a software solution that runs on MX Series devices and PTX Series devices to provide DDoS protection at the network edge. Corero SmartWall TDD uses behavioral analytics and detailed network visibility to detect and block DDoS attacks in seconds, without affecting the normal traffic. Corero SmartWall TDD can also provide advanced protection from “carpet bombing” attacks, 5G DDoS visibility, and multi-tenant portal for as-a-service offerings or views by department within an enterprise.  Corero SmartWall TDD can provide an agile and effective DDoS solution for your ISP without blocking legitimate traffic 3 4 .

The other options are incorrect because:

A. Contrail Insights. Contrail Insights is a software solution that provides network analytics and visibility for cloud and data center environments. Contrail Insights can help you monitor, troubleshoot, and optimize the performance and security of your network, but it does not provide DDoS protection by itself.  Contrail Insights can integrate with other Juniper products, such as Contrail Enterprise Multicloud, Contrail Service Orchestration, and AppFormix, to provide a comprehensive network management solution, but it is not a DDoS solution for your ISP 5 .

D. SRX Series device. SRX Series devices are high-performance firewalls that can provide DDoS protection at the network perimeter by integrating with Juniper ATP Cloud and Juniper Threat Labs. SRX Series devices can use SecIntel to receive threat intelligence feeds from Juniper ATP Cloud or Juniper Threat Labs and apply them to the security policies. SRX Series devices can also use IDP to detect and prevent application-level attacks, such as SQL injection, cross-site scripting, and buffer overflow. SRX Series devices can provide a robust and effective DDoS solution for your network, but they are not designed to handle high-volume DDoS attacks at the network edge, as MX Series devices and Corero SmartWall TDD are .

References:

Juniper and Corero Joint DDoS Protection Solution

MX-SPC3 Services Card Overview

Corero SmartWall Threat Defense Director (TDD)

Juniper Networks and Corero: A Modern Approach to DDoS Protection at Scale

Contrail Insights Overview

[SRX Series Services Gateways]

[Juniper Networks Security Intelligence (SecIntel)]

According to the Juniper documentation, Juniper ATP Cloud supports the following modes:

Layer 3 mode: In this mode, the SRX Series device acts as a Layer 3 gateway and routes traffic between different subnets. The SRX Series device performs NAT and security policy enforcement on the traffic and sends a copy of the traffic to Juniper ATP Cloud for analysis.  This mode is suitable for networks that have multiple subnets and require NAT and firewall functions 1

Transparent mode: In this mode, the SRX Series device acts as a Layer 2 bridge and forwards traffic between the same subnet. The SRX Series device does not perform NAT or security policy enforcement on the traffic, but sends a copy of the traffic to Juniper ATP Cloud for analysis.  This mode is suitable for networks that have a single subnet and do not require NAT or firewall functions 1

The other two modes, global mode and private mode, are not supported by Juniper ATP Cloud. Global mode is a configuration option for Juniper ATP Appliance, which is an on-premises solution that provides threat detection and prevention.  Private mode is a configuration option for Juniper ATP Private Cloud, which is a cloud-based solution that provides threat detection and prevention within a private network 2 3

References :

1 :  Juniper Advanced Threat Prevention Cloud | ATP Cloud | Juniper Networks   2 :  Juniper Advanced Threat Prevention Appliance | ATP Appliance | Juniper Networks   3 : [Juniper Advanced Threat Prevention Private Cloud | ATP Private Cloud | Juniper Networks]

The flow-session resource is needed in order to ensure adequate and secure communication between the two logical systems.

The flow-session resource must be defined in the security profile for the interconnect logical system because the interconnect logical system is responsible for forwarding traffic between other logical systems. The flow-session resource determines the maximum number of sessions that the interconnect logical system can create and maintain.  If the flow-session resource is not allocated or is insufficient, the interconnect logical system might drop packets or fail to establish sessions 1 .

The NAT resources are not needed to be allocated to the interconnect logical system because the interconnect logical system does not perform any NAT operations on the traffic.  The NAT resources are only relevant for the logical systems that need to translate the source or destination IP addresses or ports of the traffic 1 .

No resources are not needed to be allocated to the interconnect logical system is incorrect because the interconnect logical system still requires some resources to function properly, such as the flow-session resource.  The interconnect logical system cannot operate without any resources allocated to it 1 .

The resources must be calculated based on the amount of traffic that will flow between the logical systems is partially correct, but not the best answer. The resources must be calculated based on the amount of traffic and the type of traffic that will flow between the logical systems.  For example, the flow-session resource depends on the number and duration of sessions, the security-log-stream-number resource depends on the number and size of logs, and the NAT resource depends on the number and type of NAT rules 1 .

References :

Security Profiles for Logical Systems | Junos OS | Juniper Networks

Your company wants to take your Juniper ATP Appliance into private mode. You must give them a list of impacted features for this request. The two features that are impacted in this scenario are:

A. False Positive Reporting. False Positive Reporting is a feature that allows you to report false positive detections to Juniper Networks for analysis and improvement. False Positive Reporting requires an Internet connection to send the reports to Juniper Networks.  If you take your Juniper ATP Appliance into private mode, False Positive Reporting will be disabled and you will not be able to report false positives 1 .

C. GSS Telemetry. GSS Telemetry is a feature that allows you to send anonymized threat data to Juniper Networks for analysis and improvement. GSS Telemetry requires an Internet connection to send the data to Juniper Networks.  If you take your Juniper ATP Appliance into private mode, GSS Telemetry will be disabled and you will not be able to contribute to the threat intelligence community 2 .

The other options are incorrect because:

B. Threat Progression Monitoring. Threat Progression Monitoring is a feature that allows you to monitor the threat activity and progression across your network. Threat Progression Monitoring does not require an Internet connection and can be performed locally by the Juniper ATP Appliance.  If you take your Juniper ATP Appliance into private mode, Threat Progression Monitoring will not be impacted and you will still be able to monitor the threat activity and progression 3 .

D. Cyber Kill Chain mapping. Cyber Kill Chain mapping is a feature that allows you to map the threat activity and progression to the stages of the Cyber Kill Chain framework. Cyber Kill Chain mapping does not require an Internet connection and can be performed locally by the Juniper ATP Appliance.  If you take your Juniper ATP Appliance into private mode, Cyber Kill Chain mapping will not be impacted and you will still be able to map the threat activity and progression 4 .

References:

False Positive Reporting

GSS Telemetry

Threat Progression Monitoring

Cyber Kill Chain Mapping