Juniper JN0-232 Dumps Questions Answers

Routing instances:Security zones are local to their routing instance. Theycannot be shared between routing instances(Option B is correct). Each routing instance must define its own zones.

Intrazone and interzone traffic:Both types of traffic require policies in Junos OS. Intrazone traffic must have an explicit intra-zone policy to be controlled (Option C is correct).

Sharing zones:Option A is incorrect, as zones cannot span routing instances.

Multiple zones:SRX devices fully support multiple security zones (trust, untrust, DMZ, etc.). Option D is incorrect.

Correct Statements:B and C

By default, SRX 300 Series Firewalls come with predefined security policies:

Trust-to-Untrust (Option B):A default policy exists to permit all traffic from thetrust zone to the untrust zone.

Trust-to-Trust (Option D):Intra-zone traffic is permitted by default; hence, a trust-to-trust policy is installed automatically.

Untrust-to-Trust (Option A):Not allowed by default, since external traffic must be explicitly permitted by an administrator.

Management-to-Trust (Option C):No such default policy exists.

Correct Policies:Trust-to-Untrust and Trust-to-Trust

For an SRX firewall interface to respond to management traffic such as ICMP pings:

Theinterface must be assigned to a security zone(Option A). If an interface is not part of any zone, it is placed into the null zone, which drops all traffic.

Additionally, the zone must be configured to allow management traffic types ashost-inbound-traffic(Option D). For ICMP, the protocol must be explicitly allowed under host-inbound-traffic for that zone.

Other options:

Security policies (Option B) control traffic traversing the firewall, not traffic destined to the SRX device itself.

Assigning the interface to the null zone (Option C) prevents any communication, including management.

Correct Actions:Assign the interface to a zone and configure ICMP under host-inbound-traffic.