Juniper JN0-232関連日本語内容 & JN0-232絶対合格顧客様と販売者の間での信頼性は苦労かつ大切なことだと良く知られます。誠意をみなぎるJuniper JN0-232試験備考資料は我々チームの専業化を展示されるし、最完全の質問と再詳細の解説でもって試験に合格するのを助けるます。同時的に、皆様の認可は我々仕事の一番良い評価です。 Juniper Security, Associate (JNCIA-SEC) 認定 JN0-232 試験問題 (Q44-Q49):質問 # 44
Which zone configuration is required to permit transit traffic?
A. a user-defined security zone
B. a system-defined null zone
C. a user-defined functional zone
D. a system-defined Junos-host zone
正解：A
解説：
Transit traffic is defined as traffic passingthrough the SRX firewall(from one interface/zone to another). To allow transit traffic:
* Interfaces must be placed into auser-defined security zone(Option C).
* Policies between zones are then applied to control traffic.
* Thenull zone (Option A)discards all traffic.
* TheJunos-host zone (Option B)is used for traffic destined to the SRX itself, not transit.
* Functional zones (Option D)are predefined and used for special purposes (like management), not for transit traffic.
Correct Configuration:User-defined security zone
Reference:Juniper Networks -Security Zones and Transit Traffic, Junos OS Security Fundamentals.
質問 # 45
Which two statements about destination NAT are correct? (Choose two.)
A. Destination NAT enables hosts on the Internet to access resources on a private network.
B. SRX Series Firewalls support interface-based destination NAT.
C. Destination NAT enables hosts on a private network to access resources on the Internet.
D. SRX Series Firewalls support pool-based destination NAT.
正解：A、D
解説：
* Destination NAT purpose (Option C):Used to allow external hosts on the Internet to access internal
/private resources (such as a web server in the DMZ). Destination NAT changes the destination IP of incoming traffic to match the internal server.
* Pool-based NAT (Option D):SRX supports destination NAT pools, allowing multiple public IP addresses or ranges to be translated to internal servers.
* Incorrect options:
* Option A describessource NAT, not destination NAT.
* Option B is incorrect because SRX does not support "interface-based" destination NAT.
Correct Statements:C and D
Reference:Juniper Networks -NAT Types and Configurations (Source, Destination, and Static), Junos OS Security Fundamentals.
質問 # 46
Click the Exhibit button.
Referring to the exhibit, which two statements are correct about the traffic flow shown in the exhibit? (Choose two.)
A. The original destination IP address was translated to a new destination IP address.
B. The original source IP address was translated to a new source IP address.
C. There is no change to the original source IP address.
D. There is no change to the original destination IP address.
正解：A、B
解説：
* Inbound Flow (before NAT):Source =10.20.30.40(internal private IP)Destination =203.0.113.1(public DNS server)
* Outbound Flow (after NAT):Source =192.0.2.1(translated IP)Destination =203.0.113.1(unchanged) Analysis:
* Thesource IP (10.20.30.40)was translated to192.0.2.1. This indicatesSource NATwas applied #Option B is correct.
* Thedestination IP changedbetween the inbound and outbound view. Inbound it was203.0.113.1, and outbound it is still203.0.113.1in appearance, but notice the reversal: the session entry shows it as the outbound "source" side. This confirmsDestination NAT translation has occurredfor return flow consistency #Option D is correct.
* Option A:Incorrect. The original source IP was indeed translated.
* Option C:Incorrect. The destination IP did change in the flow processing.
Correct Statements:
* The original source IP address was translated to a new source IP address.
* The original destination IP address was translated to a new destination IP address.
Reference:Juniper Networks -Security Flow Session Output and NAT Translations, Junos OS Security Fundamentals.
質問 # 47
You are modifying the NAT rule order and you notice that a new NAT rule has been added to the bottom of the list.
In this situation, which command would you use to reorder NAT rules?
A. up
B. run
C. top
D. insert
正解：C
解説：
In Junos OS, NAT rules are evaluated intop-down order. When a new rule is added, it is placed at thebottom of the rule set by default.
* To move a rule to the top of the rule set, the command is:
* set security nat source rule-set <name> rule <rule-name> top
* Option A (top):Correct. Moves the specified rule to the top of the list.
* Option B (run):Used to execute operational commands, not rule reordering.
* Option C (up):Not valid for reordering NAT rules.
* Option D (insert):Not a supported NAT reordering command in Junos.
Correct Command:top
Reference:Juniper Networks -NAT Rule Evaluation Order and Rule Reordering, Junos OS Security Fundamentals.
質問 # 48
Click the Exhibit button.
The exhibit shows a table representing security policies from the trust zone to the untrust zone.
In this scenario, which two statements are correct? (Choose two.)
A. FTP requests from the source IP address of 172.25.11.11 are denied to the destination IP address of
10.1.0.10.
B. SSH requests from the source IP address of 172.25.11.10 are permitted to the destination IP address of
10.1.0.10.
C. FTP requests from the source IP address of 10.1.0.10 are permitted to the destination IP address of
172.25.11.100.
D. Ping command requests from the source IP address of 172.25.11.100 are denied to the destination IP address of 10.1.0.10.
正解：A、B
解説：
Juniper SRX evaluatessecurity policiessequentially from top to bottom. Once a policy match is found, no further policies are evaluated. In this exhibit:
* First Policy (FTP, deny):
* Source: 172.25.11.0/24
* Destination: 10.1.0.0/16
* Application: FTP
* Action: deny#Any FTP traffic from 172.25.11.0/24 to 10.1.0.0/16 isdenied.
* Second Policy (SSH, permit):
* Same source/destination but application = SSH
* Action = permit#SSH traffic from 172.25.11.0/24 to 10.1.0.0/16 ispermitted.
* Third Policy (HTTPS, permit):#HTTPS from the same source/destination ispermitted.
* Fourth Policy (Ping, permit):
* Source: 172.25.11.0/24 to any destination
* Application: ping
* Action: permit#ICMP echo requests (ping) from 172.25.11.0/24 to any destination arepermitted.
* Fifth Policy (any # any, deny):#Serves as a defaultdeny allat the end.
Now checking each option:
* Option A:SSH from 172.25.11.10 # 10.1.0.10 matches theSSH permit rule(second policy).#Correct.
* Option Bing from 172.25.11.100 # 10.1.0.10 matches theping permit rule(fourth policy). This traffic is permitted, not denied.#Incorrect.
* Option C:FTP from 10.1.0.10 # 172.25.11.100 isreverse traffic (untrust to trust). The table applies onlytrust # untrust, so this policy does not apply.#Incorrect.
* Option D:FTP from 172.25.11.11 # 10.1.0.10 matches the first policy (FTP deny rule).#Correct.
Correct Statements:A, D
Reference:Juniper Networks -Security Policies Evaluation Order, Junos OS Security Fundamentals, Official Course Guide.
ing from 172.25.11.100 # 10.1.0.10 matches theping permit rule(fourth policy). This traffic is permitted, not denied.#Incorrect.