Which security or functional zone name has special significance to the Junos OS?
A.
self
B.
trust
C.
untrust
D.
junos-global
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USER-DEFINED
Security Zones
Security zones are a collection of one or more network segments requiring regulation of inbound and outbound traffic through the use of policies. Security zones apply to transit traffic as well as traffic destined to any interfaces belonging to the security zone. You need one or more security policies to regulate intrazone and interzone traffic. Note that the Junos OS does not have any default security zones, and you cannot share a security zone between routing instances.
Functional Zones
Functional zones are special-purpose zones that cannot be specified in security policies. Note that transit traffic does not use functional zones. While the fxp0 management Ethernet interface is out-of-band by default, the Management zone allows you to assign other network interfaces the same behavior of isolating management traffic from transit traffic.
SYSTEM-DEFINED
Null Zone
Currently only one system-defined zone exists, the Null zone. By default, all interfaces belong to the Null zone. You cannot configure the Null zone. When you delete an interface from a zone, the software assigns it back to the Null zone. The Junos OS rejects all traffic to and from interfaces belonging to the Null zone.
Junos-Host Zone
The junos-host zone is a system-defined zone. You can configure the junos-host zone in a security policy to provide granular control for which host-inbound or host-outbound traffic is allowed in or out of a security zone on the SRX device.
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