Juniper Updated JN0-636 Exam Questions and Answers by niall

In IPsec CoS-based VPNs, the number of IPsec Security Associations (SAs) associated with a peer is based on the number of forwarding classes configured for the VPN. The forwarding classes are used to classify and prioritize different types of traffic, such as voice and data traffic. Each forwarding class requires a separate IPsec SA to be established between the peers, in order to provide the appropriate level of security and quality of service for each type of traffic.

The two security intelligence feed types that are supported are:

• A. Infected host feed. An infected host feed is a security intelligence feed that contains the IP addresses of hosts that are infected by malware or compromised by attackers. The SRX Series device can download the infected host feed from the Juniper ATP Cloud or generate its own infected host feed based on the detection events from IDP. The SRX Series device can use the infected host feed to block or quarantine the traffic to or from the infected hosts based on the security policies1.
• B. Command and Control feed. A command and control 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 SRX Series device can download the command and control feed from the Juniper ATP Cloud or generate its own command and control feed based on the detection events from IDP. The SRX Series device can use the command and control feed to block or log the traffic to or from the command and control servers based on the security policies2.

The other options are incorrect because:

• C. Custom feeds. Custom feeds are not a security intelligence feed type, but a feature that allows you to create your own security intelligence feeds based on your own criteria and sources. You can configure custom feeds by using the Junos Space Security Director or the CLI. Custom feeds are not supported by the Juniper ATP Cloud or the IDP3.
• D. Malicious URL feed. Malicious URL feed is not a security intelligence feed type, but a feature that allows you to block or log the traffic to or from malicious URLs based on the security policies. The SRX Series device can download the malicious URL feed from the Juniper ATP Cloud or the Juniper Threat Labs. Malicious URL feed is not supported by the IDP4.

References:

• Infected Host Feed Overview
• Command and Control Feed Overview
• Custom Feed Overview
• Malicious URL Feed Overview

You are required to secure a network against malware. You must ensure that in the event that a compromised host is identified within the network, the host is isolated from the rest of the network. In this scenario, after a threat has been identified, the two components that are responsible for enforcing MAC-level infected host are:

• C. Policy Enforcer. Policy Enforcer is a software solution that integrates with Juniper ATP Cloud and Juniper ATP Appliance to provide automated threat remediation across the network. Policy Enforcer can receive threat intelligence feeds from Juniper ATP Cloud or Juniper ATP Appliance and apply them to the security policies on the SRX Series devices and the EX Series devices. Policy Enforcer can also enforce MAC-level infected host, which is a feature that allows you to quarantine a compromised host by blocking its MAC address on the switch port. Policy Enforcer can communicate with the EX Series devices and instruct them to apply the MAC-level infected host policy to the infected host1.
• D. EX Series device. EX Series devices are Ethernet switches that can provide Layer 2 and Layer 3 switching capabilities and security features. EX Series devices can integrate with Policy Enforcer and Juniper ATP Cloud or Juniper ATP Appliance to provide automated threat remediation across the network. EX Series devices can support MAC-level infected host, which is a feature that allows them to quarantine a compromised host by blocking its MAC address on the switch port. EX Series devices can receive instructions from Policy Enforcer and apply the MAC-level infected host policy to the infected host2.

The other options are incorrect because:

• A. SRX Series device. SRX Series devices are high-performance firewalls that can provide Layer 3 and Layer 4 security features and integrate with Juniper ATP Cloud or Juniper ATP Appliance to provide advanced threat prevention. SRX Series devices can receive threat intelligence feeds from Juniper ATP Cloud or Juniper ATP Appliance and apply them to the security policies. However, SRX Series devices cannot enforce MAC-level infected host, which is a feature that requires Layer 2 switching capabilities and is supported by EX Series devices3.
• B. Juniper ATP Appliance. Juniper ATP Appliance is a hardware solution that provides advanced threat prevention by detecting and blocking malware, ransomware, and other cyberattacks. Juniper ATP Appliance can analyze the network traffic and identify the compromised hosts based on their behavior and communication patterns. Juniper ATP Appliance can also send threat intelligence feeds to Policy Enforcer and SRX Series devices to enable automated threat remediation across the network. However, Juniper ATP Appliance cannot enforce MAC-level infected host, which is a feature that requires Layer 2 switching capabilities and is supported by EX Series devices.

References:

• Policy Enforcer Overview
• EX Series Switches Overview
• SRX Series Services Gateways Overview
• [Juniper ATP Appliance Overview]

The security feature that bypasses routing or switching lookup is transparent mode. The other options are incorrect because:

• B. Secure wire is a feature that allows you to connect two interfaces on the same device and forward traffic between them without any processing. Secure wire does not bypass routing or switching lookup, but rather eliminates them altogether1.
• C. Mixed mode is a mode of operation for SRX Series devices that allows you to configure both transparent mode and switching mode on the same device. Mixed mode does not bypass routing or switching lookup, but rather uses them depending on the interface type2.
• D. MACsec (Media Access Control Security) is a feature that provides encryption and authentication for Layer 2 traffic. MACsec does not bypass routing or switching lookup, but rather operates at a lower layer3.

Therefore, the correct answer is A. Transparent mode is a mode of operation for SRX Series devices that provides Layer 2 bridging capabilities with full security services. In transparent mode, the SRX Series device acts as a bridge between two network segments and inspects the packets without modifying the source or destination information in the IP packet header. The SRX Series device does not have an IP address in transparent mode, except for the management interface. Transparent mode bypasses routing or switching lookup, because the SRX Series device does not perform any routing or switching functions, but rather forwards the packets based on the MAC addresses4.

References:

• Secure Wire Overview
• Mixed Mode Overview
• MACsec Overview
• Transparent Mode Overview