JN0-231 Sample Questions Answers

The correct command to collect the serial number of an SRX Series device is the show chassis hardware command [1]. This command will return the serial number of the device, along with other information about the device such as the model number, part number, and version.

This command is available in Junos OS. More information about the show chassis hardware command can be found in the Juniper Networks technical documentation here [1]: https://www.juniper.net/documentation/en_US/ junos/topics/reference/command-summary/show-chassis-hardware.html.

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

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.

Juniper ATP should be configured with C&C feeds that contain lists of malicious domains and IP addresses in order to prevent IP cameras from becoming zombies in a DDoS attack.

This is an important step to ensure that the IP cameras are protected from malicious requests - and thus, they will not be able to be used in any DDoS attacks against the facility.

The proxy ID is used as a final check to verify the peer before IPsec tunnel establishment. The proxy ID is a combination of local and remote subnet and protocol, and it is used to match the traffic that is to be encrypted. If the proxy IDs match between the two IPsec peers, the IPsec tunnel is established, and the traffic is encrypted.

Understanding the Requirement:

The scenario involves managing multiple branch SRX Series devices using a cloud-based solution for configuration and monitoring.

The solution must provide centralized visibility and control without requiring extensive on-premise infrastructure.

Evaluation of the Options:

Option A: J-Web

J-Web is a local web-based GUI tool for configuring and managing a single Juniper device.

It is not a cloud-based solution and is suitable for small-scale, device-specific management.

Incorrect.

Option B: Juniper Sky Enterprise

Juniper Sky Enterprise is a cloud-based management platform specifically designed for Juniper devices, including SRX Series.

It provides centralized configuration, monitoring, and management for distributed branch locations.

It does not require any on-premises infrastructure and is easy to deploy.

Features include:

Zero-touch provisioning.

Policy-based management.

Centralized logging and reporting.

Correct.

Option C: Junos Space Security Director

Junos Space Security Director is an on-premises or private cloud management tool for managing Juniper security devices.

It is not a fully cloud-based solution and requires the Junos Space platform to be deployed in the network.

Suitable for larger enterprises with a private data center.

Incorrect.

Option D: Juniper Secure Analytics (JSA)

JSA is a log and event management solution designed for security analytics and threat intelligence.

It focuses on collecting and analyzing security logs rather than device configuration and monitoring.

Incorrect.

Why Juniper Sky Enterprise is the Correct Solution:

Cloud-Based Management: Juniper Sky Enterprise provides a fully cloud-hosted environment for managing and monitoring SRX devices, making it ideal for distributed branches.

Ease of Deployment: Requires no additional hardware or software at the branch location.

Comprehensive Features: Offers visibility, configuration management, and logging for multiple SRX devices from a centralized dashboard.

Scalability: Suitable for small to large-scale deployments with minimal operational overhead.

Juniper Security Reference:

Refer to the Juniper Sky Enterprise Overview for detailed documentation and features.

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.

Network Prefixes in Address Books

You can specify addresses as network prefixes in the prefix/length format. For example, 203.0.113.0/24 is an acceptable address book address because it translates to a network prefix. However, 203.0.113.4/24 is not acceptable for an address book because it exceeds the subnet length of 24 bits. Everything beyond the subnet length must be entered as 0 (zero). In special scenarios, you can enter a hostname because it can use the full 32-bit address length.

https://www.junipe r.net/documentation/us/en/software/junos/security-policies/topics/topic-map/security-address-books-sets.html

By default, TCP has a 30-minute idle timeout, and UDP has a 60-second idle timeout. Additionally, known IP protocols have a 30-minute timeout, whereas unknown ones have a 60-second timeout. Setting the inactivity timeout is very useful, particularly if you are concerned about applications either timing out or remaining idle for too long and filling up the session table. According to the Juniper SRX Series Services Guide, this can be configured using the 'timeout inactive' statement for the security policy.

Use the persistent-nat feature to ensure that all requests from the same internal transport address are mapped to the same reflexive transport address (the public IP address and port created by the NAT device closest to the STUN server). The source NAT rule action can use a source NAT pool (with or without port translation) or an egress interface.

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