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| Section | Weight | Objectives |
|---|---|---|
| Configuration Basics | 15% | - Configuration management
|
| Networking Fundamentals | 15% | - Ethernet and switching fundamentals
|
| Junos OS Fundamentals | 20% | - Traffic processing
|
| Operational Monitoring and Maintenance | 15% | - System maintenance
|
| Routing Fundamentals | 10% | - Routing concepts
|
| User Interfaces | 15% | - Command Line Interface (CLI)
|
| Routing Policy and Firewall Filters | 10% | - Firewall filters
|
The Juniper JN0-106 Certification is one of the most valuable certificates in the modern Juniper world. This Junos, Associate (JNCIA-Junos) (JN0-106) certification exam is designed to validate a candidate's skills and knowledge level. With this JN0-106 exam everyone whether he is a beginner or seasoned professional can not only validate their expertise but also get solid proof of their skills and knowledge. By doing this you can gain several personal and professional benefits.
NEW QUESTION # 39
What information is exchanged during a TCP three-way handshake? (Choose two.)
Answer: A,D
Explanation:
Sequence numbers are exchanged to establish reliable communication and track the order of transmitted data.
Port numbers are exchanged to identify the sending and receiving applications on the devices.
NEW QUESTION # 40
Which two statements describe rollback configuration behavior in Junos OS? (Choose two.)
Answer: C,D
Explanation:
Junos OS incorporates a robust configuration versioning and recovery system designed to protect against configuration errors and human oversight. A key feature of this system is that rollback files are stored automatically by the device after each successful commit. These files represent a historical record of previous active configurations. By default, the system maintains a set number of these files, allowing an administrator to revert to a previous state (e.g., rollback 1) if the most recent changes result in unexpected network instability.
Another critical safety mechanism is the behavior associated with the commit confirmed command. If an administrator issues this command but fails to provide a subsequent confirmation within a designated timeframe (defaulting to 10 minutes), the system assumes a loss of management connectivity. Consequently, the rollback configurations are applied automatically after the commit confirmed timeout to restore the previous known-good state. This is an essential best practice for remote configuration management. It is important to note that rollback 0 refers to the currently active configuration, not the factory default, and that while Junos supports maintaining a large number of rollback files, the primary operational benefit lies in the automated storage and confirmation-based recovery processes that ensure the device remains reachable and stable.
NEW QUESTION # 41
Exhibit:
Referring to the exhibit, which routing configuration is required for these two users to access the remote server?
Answer: D
Explanation:
The network topology illustrates two distinct IP subnets, 10.1.1.0/24 and 10.1.2.0/24 , separated by a Layer 3 router. For hosts on the first subnet to communicate with the server on the second subnet, an intermediary device must perform inter-subnet routing. The router acts as the exit point for each local segment, utilizing its interfaces assigned with the .254 host address as the logical path to external networks.
The fundamental requirement for this communication is the configuration of a default gateway on all end- nodes. When the users (on 10.1.1.0/24 ) attempt to send data to the server (on 10.1.2.0/24 ), their local TCP/IP stack recognizes the destination is not on the local wire. Without a defined default gateway, the hosts would simply drop the traffic as unroutable. By setting the default gateway to 10.1.1.254 for users and 10.1.2.254 for the server, the hosts are instructed to forward all off-net traffic to the router. The router then consults its routing table-which contains these directly connected routes-and forwards the packets to the appropriate egress interface. While VLAN tagging or routing protocols could exist in more complex environments, the primary necessity for basic reachability between these two specific segments is a correctly configured gateway on the terminal devices. Reference: Networking Fundamentals, IP Routing Basics, Default Gateway Configuration.
NEW QUESTION # 42
Which protocol provides secure remote CLI access to a Junos device?
Answer: D
Explanation:
Securing the management plane is a core requirement for any Junos OS deployment. Secure Shell (SSH) is the industry-standard protocol used to provide encrypted, authenticated remote access to the Junos Command Line Interface (CLI). Unlike Telnet, which transmits both administrative credentials and command data in cleartext, SSH utilizes public-key cryptography to establish a secure tunnel, protecting the session from eavesdropping, man-in-the-middle attacks, and unauthorized interception.
In Junos OS, SSH is typically enabled within the [edit system services] hierarchy. Once active, it allows administrators to perform operational and configuration tasks with the assurance that their management traffic remains confidential. Beyond simple terminal access, SSH serves as the transport mechanism for other secure management functions, such as the NETCONF XML management protocol and Secure Copy (SCP) for file transfers. For high-security environments, Junos supports advanced SSH features including key-based authentication, strong cipher suites, and multi-factor authentication integration. Disabling insecure protocols like Telnet and FTP in favor of SSH and SFTP/SCP is a foundational best practice for hardening the Routing Engine against external threats.
Reference: User Interfaces, Accessing the Junos CLI, System Services.
NEW QUESTION # 43
Which two protocols use UDP to facilitate speed? (Choose two.)
Answer: B,C
NEW QUESTION # 44
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