Juniper JN0-335 Questions Answers

 The policy rematch feature enables the device to reevaluate an active session when its associated security policy is modified. The session remains open if it still matches the policy that allowed the session initially. The session is closed if its associated policy is renamed, deactivated, or deleted1

When a policy change includes changing the policy’s action from permit to deny, all existing sessions are dropped. This is because the policy rematch feature does not allow a session to continue if it violates the new policy action1

When a policy change includes changing the policy’s source or destination address match condition, all existing sessions are reevaluated. This is because the policy rematch feature tries to find a suitable policy that can still permit the session based on the new address criteria. If no such policy exists, the session is dropped12

References: 1: policy-rematch | Junos OS | Juniper Networks 2: What is session rematch and how to use it to avoid traffic disruption during a policy update via NSM - Juniper Networks

• A: In the vSwitch security settings, accept promiscuous mode. This is a true statement. Promiscuous mode allows the vSwitch to forward all frames to the vSRX control interface, regardless of the destination MAC address1. This is necessary for the control link to function properly and exchange heartbeat messages between the cluster nodes2.
• C: In the vSwitch security settings, reject forged transmits. This is also a true statement. Forged transmits are frames that have a source MAC address that is different from the one that is assigned to the vNIC by the host operating system1. Rejecting forged transmits prevents spoofing attacks and ensures that the control link traffic is authentic2.
• B: In the vSwitch properties settings, set the VLAN ID to None. This is a false statement. The VLAN ID for the vSwitch can be any value as long as it matches the VLAN ID for the vSRX control interface1. The VLAN ID is used to tag the control link traffic and separate it from other traffic on the same vSwitch2.
• D: In the vSwitch security settings, reject MAC address changes. This is also a false statement. MAC address changes are allowed for the vSRX control interface, as the vSRX uses the MAC address of the control link to identify the cluster nodes1. Rejecting MAC address changes would prevent the cluster formation and synchronization2.

References:

• 1: vSRX Virtual Firewall Cluster Staging and Provisioning for VMware
• 2: Configuring Chassis Clustering on SRX Series Devices

Juniper ATP Cloud is a cloud-based threat detection service that protects all hosts in your network against evolving security threats. Juniper ATP Cloud performs the following tasks:

• It extracts potentially malicious objects and files from the traffic and sends them to the cloud for analysis.
• It uses multiple antivirus software packages to analyze files and identify known malicious files quickly. It also uses other techniques, such as machine learning, sandboxing, and behavioral analysis, to identify new malware and add it to the known list of malware.
• It correlates between newly identified malware and known command and control (C&C) sites to aid analysis.
• It blocks known malicious file downloads and outbound C&C traffic.
• It provides features such as DNS, Encrypted Traffic Insights (ETI) and IoT security if you have ATP Cloud premium license.

Based on this information, we can infer the following:

• Option B is correct because Juniper ATP Cloud uses multiple antivirus software packages to analyze files, as well as other techniques, to provide robust coverage against sophisticated, evasive threats.
• Option D is correct because Juniper ATP Cloud does not use antivirus software packages to protect against zero-day threats, which are unknown and undetected by traditional antivirus solutions. Instead, it uses other techniques, such as machine learning, sandboxing, and behavioral analysis, to identify and mitigate zero-day threats.
• Option A is incorrect because Juniper ATP Cloud does not only use one antivirus software package to analyze files, but multiple ones, as well as other techniques.
• Option C is incorrect because Juniper ATP Cloud does not use antivirus software packages to protect against zero-day threats, but other techniques.

References: Juniper Security, Specialist (JNCIS-SEC) Reference Materials and Juniper Security, Professional (JNCIP-SEC) Reference Materials

https://blogs.juniper.net/en-us/security/juniper-strengthens-connected-security-portfolio-with-new-risk-based-access-control-capabilities-and-remote-access-vpn

https://blogs.juniper.net/en-us/security/juniper-strengthens-connected-security-portfolio-with-new-risk-based-access-control-capabilities-and-remote-access-vpn