Juniper JN0-231 Exam Prep Guide Prep guide for the JN0-231 Exam [Q27-Q47]

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Juniper JN0-231 Exam Prep Guide: Prep guide for the JN0-231 Exam

2023 New Preparation Guide of Juniper JN0-231 Exam

Q27. What are two valid address books? (Choose two.)

66.129.239.128/25

66.129.239.154/24

66.129.239.0/24

66.129.239.50/25

Q28. Screens on an SRX Series device protect against which two types of threats? (Choose two.)

IP spoofing

ICMP flooding

zero-day outbreaks

malicious e-mail attachments

ICMP flood
Use the ICMP flood IDS option to protect against ICMP flood attacks. An ICMP flood attack typically occurs when ICMP echo requests use all resources in responding, such that valid network traffic can no longer be processed.
The threshold value defines the number of ICMP packets per second (pps) allowed to be send to the same destination address before the device rejects further ICMP packets.
IP spoofing
Use the IP address spoofing IDS option to prevent spoofing attacks. IP spoofing occurs when an invalid source address is inserted in the packet header to make the packet appear to come from a trusted source.
https://www.juniper.net/documentation/us/en/software/junos/denial-of-service/topics/topic-map/security-introduction-to-adp.html

Q29. Which statement is correct about static NAT?

Static NAT supports port translation.

Static NAT rules are evaluated after source NAT rules.

Static NAT implements unidirectional one-to-one mappings.

Static NAT implements unidirectional one-to-many mappings.

Static NAT (Network Address Translation) is a type of NAT that maps a public IP address to a private IP address. With static NAT, a one-to-one mapping is created between a public IP address and a private IP address. This means that a single public IP address is mapped to a single private IP address, and all incoming traffic to the public IP address is forwarded to the private IP address.

Q30. Which statement is correct about unified security policies on an SRX Series device?

A zone-based policy is always evaluated first.

The most restrictive policy is applied regardless of the policy level.

A global policy is always evaluated first.

The first policy rule is applied regardless of the policy level.

Q31. Exhibit.

Which statement is correct regarding the interface configuration shown in the exhibit?

The interface MTU has been increased.

The IP address has an invalid subnet mask.

The IP address is assigned to unit 0.

The interface is assigned to the trust zone by default.

Q32. Which two user authentication methods are supported when using a Juniper Secure Connect VPN? (Choose two.)

certificate-based

multi-factor authentication

local authentication

active directory

“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/topics/topic-map/secure-connect-getting-started.html

Q33. Exhibit.

Which statement is correct regarding the interface configuration shown in the exhibit?

The interface MTU has been increased.

The IP address has an invalid subnet mask.

The IP address is assigned to unit 0.

The interface is assigned to the trust zone by default.

Q34. Referring to the exhibit.

Which type of NAT is being performed?

Source NAT with PAT

Source NAT without PAT

Destination NAT without PAT

Destination NAT with PAT

Q35. Which two statements are true about security policy actions? (Choose two.)

The reject action drops the traffic and sends a message to the source device.

The deny action silently drop the traffic.

The deny action drops the traffic and sends a message to the source device.

The reject action silently drops the traffic.

Q36. When configuring antispam, where do you apply any local lists that are configured?

custom objects

advanced security policy

antispam feature-profile

antispam UTM policy

user@host# set security utm custom-objects url-pattern url-pattern-name https://www.juniper.net/documentation/us/en/software/junos/utm/topics/topic-map/security-local-list-antispam-filtering.html

Q37. Which Juniper Networks solution uses static and dynamic analysis to search for day-zero malware threats?

firewall filters

UTM

Juniper ATP Cloud

IPS

Malware Sandboxing
Detect and stop zero-day and commodity malware within web, email, data center, and application traffic targeted for Windows, Mac, and IoT devices. https://www.juniper.net/us/en/products/security/advanced-threat-prevention.html

Q38. A security zone is configured with the source IP address 192.168.0.12/255.255.0.255 wildcard match.
In this scenario, which two IP packets will match the criteria? (Choose two.)

192.168.1.21

192.168.0.1

192.168.1.12

192.168.22.12

Q39. Which order is correct for Junos security devices that examine policies for transit traffic?

zone policies
global policies
default policies

default policies
zone policies
global policies

default policies
global policies
zone policies

global policies
zone policies
default policies

Q40. You are assigned a project to configure SRX Series devices to allow connections to your webservers. The webservers have a private IP address, and the packets must use NAT to be accessible from the Internet. The webservers must use the same address for both connections from the Internet and communication with update servers.
Which NAT type must be used to complete this project?

source NAT

destination NAT

static NAT

hairpin NAT

Only static NAT with pool ensures both traffic initiated from inside and outside networks use the same IP address.

Q41. Referring to the exhibit.

Users on the network are restricted from accessing Facebook, however, a recent examination of the logs show that users are accessing Facebook.
Why is this problem happening?

Global rules are honored before zone-based rules.

The internet-Access rule has a higher precedence value

The internet-Access rule is listed first

Zone-based rules are honored before global rules

Q42. Your company uses SRX Series devices to secure the edge of the network. You are asked protect the company from ransom ware attacks.
Which solution will satisfy this requirement?

Sky ATP

AppSecure

Unified security policies

screens

Q43. You want to generate reports from the l-Web on an SRX Series device.
Which logging mode would you use in this scenario?

Syslog

Stream

Event

local

Q44. Which statement is correct about Web filtering?

The Juniper Enhanced Web Filtering solution requires a locally managed server.

The decision to permit or deny is based on the body content of an HTTP packet.

The decision to permit or deny is based on the category to which a URL belongs.

The client can receive an e-mail notification when traffic is blocked.

Web filtering is a feature that allows administrators to control access to websites by categorizing URLs into different categories such as gambling, social networking, or adult content. The decision to permit or deny access to a website is based on the category to which a URL belongs. This is done by comparing the URL against a database of categorized websites and making a decision based on the policy defined by the administrator.
Reference:
Juniper Networks SRX Series Services Gateway Web Filtering Configuration Guide: https://www.juniper.net/documentation/en_US/release-independent/junos/topics/topic-map/security-services-web-filtering.html

Q45. Which two non-configurable zones exist by default on an SRX Series device? (Choose two.)

Junos-host

functional

null

management

Junos-host and null are two non-configurable zones that exist by default on an SRX Series device. Junos-host is the default zone for all internal interfaces and services, such as management and other loopback interfaces. The null zone is used to accept all traffic that is not explicitly accepted by other security policies, and is the default zone for all unclassified traffic. Both zones cannot be modified or deleted.

Q46. When transit traffic matches a security policy, which three actions are available? (Choose three.)

Allow

Discard

Deny

Reject

Permit

Q47. Click the Exhibit button.

Which two statements are correct about the partial policies shown in the exhibit? (Choose two.)

UDP traffic matched by the deny-all policy will be silently dropped.

TCP traffic matched by the reject-all policy will have a TCP RST sent.

TCP traffic matched from the zone trust is allowed by the permit-all policy.

UDP traffic matched by the reject-all policy will be silently dropped.

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Learn about the difficulty of the Juniper JN0-231 Exam

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