You want to verify the peer before IPsec tunnel establishment. What would be used as a final check in this scenario?

1. A. traffic selector
2. B. perfect forward secrecy
3. C. st0 interfaces
4. D. proxy ID

Correct Answer: D
The proxy ID is used as a final check to verify the peer before IPsec tunnel establishment. The proxy ID is a combination of local and remote subnet and protocol, and it is used to match the traffic that is to be encrypted. If the proxy IDs match between the two IPsec peers, the IPsec tunnel is established, and the traffic is encrypted.

An application firewall processes the first packet in a session for which the application has not yet been identified.
In this scenario, which action does the application firewall take on the packet?

1. A. It allows the first packet.
2. B. It denies the first packet and sends an error message to the user.
3. C. It denies the first packet.
4. D. It holds the first packet until the application is identified.

Correct Answer: D
This is necessary to ensure that the application firewall can properly identify the application and the correct security policies can be applied before allowing any traffic to pass through.
If the first packet was allowed to pass without first being identified, then the application firewall would not know which security policies to apply - and this could potentially lead to security vulnerabilities or breaches. So it's important that the first packet is held until the application is identified.

Which two statements are correct about IKE security associations? (Choose two.)

1. A. IKE security associations are established during IKE Phase 1 negotiations.
2. B. IKE security associations are unidirectional.
3. C. IKE security associations are established during IKE Phase 2 negotiations.
4. D. IKE security associations are bidirectional.

Correct Answer: AD

Which two statements are correct about IPsec security associations? (Choose two.)

1. A. IPsec security associations are bidirectional.
2. B. IPsec security associations are unidirectional.
3. C. IPsec security associations are established during IKE Phase 1 negotiations.
4. D. IPsec security associations are established during IKE Phase 2 negotiations.

Correct Answer: AD
The two statements that are correct about IPsec security associations are that they are bidirectional and that they are established during IKE Phase 2 negotiations. IPsec security associations are bidirectional, meaning that they provide security for both incoming and outgoing traffic. IPsec security associations are established during IKE Phase 2 negotiations, which negotiates the security parameters and establishes the security association between the two peers. For more information, please refer to the Juniper Networks IPsec VPN Configuration Guide, which can be found on Juniper's website.

Which two user authentication methods are supported when using a Juniper Secure Connect VPN? (Choose two.)

1. A. certificate-based
2. B. multi-factor authentication
3. C. local authentication
4. D. active directory

Correct Answer: CD
"Local Authentication—In local authentication, the SRX Series device validates the user credentials by checking them in the local database. In this method, the administrator handles change of password or resetting of forgotten password. Here, it requires that an user must remember a new password. This option is not much preferred from a security standpoint.
• External Authentication—In external authentication, you can allow the users to use the same user credentials they use when accessing other resources on the network. In many cases, user credentials are domain logon used for Active Directory or any other LDAP authorization system. This method simplifies user experience and improves the organization’s security posture; because you can maintain the authorization system with the regular security policy used by your organization."
https://www.juniper.net/documentation/us/en/software/secure-connect/secure-connect-administrator-guide/topic