Which two statements are correct about mixed mode? (Choose two.)
Answer(s): B,C
Exhibit:You are having problems configuring advanced policy-based routing.What should you do to solve the problem?
Answer(s): B
Exhibit:In which mode is the SRX Series device?
Answer(s): C
You configure two Ethernet interfaces on your SRX Series device as Layer 2 interfaces and add them to the same VLAN. The SRX is using the default L2-learning setting. You do not add the interfaces to a security zone.Which two statements are true in this scenario? (Choose two.)
Answer(s): A,C
When Ethernet interfaces are configured as Layer 2 and added to the same VLAN without being assigned to a security zone, they will not forward traffic by default. Additionally, because they are operating in a pure Layer 2 switching mode, they lack the capability to enforce stateful security policies. For further details, refer to Juniper Ethernet Switching Layer 2 Documentation.Explanation of Answer A (Unable to Apply Stateful Security Features):When two interfaces are configured as Layer 2 interfaces and belong to the same VLAN but are not assigned to any security zone, traffic switched between them is handled purely at Layer 2. Stateful security features, such as firewall policies, are applied at Layer 3, so traffic between these interfaces will not undergo any stateful inspection or firewalling by default. Explanation of Answer C (Interfaces Will Not Forward Traffic):In Junos, Layer 2 interfaces must be added to a security zone to allow traffic forwarding. Since the interfaces in this scenario are not part of a security zone, they will not forward traffic by default until assigned to a zone. This is a security measure to prevent unintended forwarding of traffic.Juniper Security
Layer 2 Interface Configuration: Layer 2 interfaces must be properly assigned to security zones to enable traffic forwarding and apply security policies.Juniper Networks Layer 2 Interface Documentation.
Which two statements are true about the procedures the Junos security device uses when handling traffic destined for the device itself? (Choose two.)
When handling traffic that is destined for itself, the SRX examines the host-inbound-traffic configuration for the ingress interface and the associated security zone. It evaluates whether the traffic should be allowed based on this configuration. Traffic not addressed to the ingress interface is handled based on security policies within the junos-host zone, which applies to traffic directed to the SRX itself. For more details, refer to Juniper Host Inbound Traffic Documentation.When handling traffic that is destined for the SRX device itself (also known as host-bound traffic), the SRX follows a specific process to evaluate the traffic and apply the appropriate security policies. The junos-host zone is a special security zone used for managing traffic destined for the device itself, such as management traffic (SSH, SNMP, etc.).Explanation of Answer B (Packet to a Different Interface):If the packet is destined for an interface other than the ingress interface, the SRX performs a security policy evaluation specifically for the junos-host zone. This ensures that management or host-bound traffic is evaluated according to the security policies defined for that zone. Explanation of Answer C (Packet to the Ingress Interface):If the packet is addressed to the ingress interface, the device first checks the host-inbound-traffic configuration for the ingress interface and zone. This configuration determines whether certain types of traffic (such as SSH, HTTP, etc.) are allowed to reach the device on that specific interface.Step-by-Step Handling of Host-Bound Traffic:Host-Inbound Traffic: Define which services are allowed to the SRX device itself:bash set security zones security-zone <zone-name> host-inbound-traffic system-services ssh Security Policy for junos-host: Ensure policies are defined for managing traffic destined for the SRX device:bash set security policies from-zone <zone-name> to-zone junos-host policy allow-ssh match source- address any set security policies from-zone <zone-name> to-zone junos-host policy allow-ssh match destination- address anyJuniper Security
Junos-Host Zone: This special zone handles traffic destined for the SRX device, including management traffic. Security policies must be configured to allow this traffic.Juniper Networks Host-Inbound Traffic Documentation.
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