View Full Juniper JN0-106 Exam Dumps and Practice Test Dumps.

 

Question 121

Which Junos command can be used to display the system hostname?

1. show system hostname
2. show hostname
3. show host-name
4. show system name

Correct Answer: 2

Explanation

The show hostname command displays the hostname configured on a Junos device. A hostname provides an identifiable name for the device and is commonly used in the CLI prompt, system logs, and network-management environments. Administrators often configure meaningful hostnames to make it easier to identify individual routers and switches. Verifying the hostname can be useful when working with multiple devices or troubleshooting logs collected from different systems. The hostname is a system-level configuration item and is separate from interface addresses and routing information.

Question 122

Which Junos configuration hierarchy is used to configure the device hostname?

1. system
2. interfaces
3. routing-options
4. protocols

Correct Answer: 1

Explanation

The system hierarchy contains configuration settings related to the overall operation and identity of a Junos device. The hostname is configured within this hierarchy. Other system-level settings can include user accounts, services, logging, time-related configuration, and various management functions. Administrators should understand the Junos configuration hierarchy because locating the correct section makes configuration tasks more efficient. After changing the hostname, the administrator must commit the configuration before the change becomes part of the active configuration.

Question 123

Which Junos command is used to display users configured on the device?

1. show system users
2. show configuration system login
3. show users configuration
4. show system accounts

Correct Answer: 2

Explanation

The show configuration system login command displays configuration statements associated with local login accounts and authentication settings. This differs from show system users, which displays users currently logged into the device. Reviewing the configuration can help administrators verify which local accounts exist and how authentication is configured. User-account management is an important part of network-device security because administrators should ensure that only authorized users have appropriate access. Configuration review should be performed carefully before making authentication changes.

Question 124

Which Junos hierarchy is used to configure local user accounts?

1. system login
2. access users
3. security accounts
4. users system

Correct Answer: 1

Explanation

The system login hierarchy is used to configure local user accounts and related authentication settings in Junos OS. Administrators can define usernames, authentication credentials, login classes, and other account-related properties under this hierarchy. Login classes control the permissions available to users, helping administrators apply appropriate access levels. Proper user configuration is important because network devices contain sensitive infrastructure settings. After making account changes, the administrator must commit the configuration for the changes to become active.

Question 125

What is the purpose of a Junos login class?

1. To define user permissions
2. To assign IP addresses
3. To configure VLANs
4. To select routing protocols

Correct Answer: 1

Explanation

A Junos login class defines the permissions and access capabilities available to a user. Login classes can help administrators implement role-based access by controlling which operational commands or configuration activities a user can perform. This allows organizations to provide users with only the privileges required for their responsibilities. Separating administrative privileges is an important security practice because unrestricted access is not always necessary for every user. Junos includes predefined classes and also allows administrators to create customized classes according to operational requirements.

Question 126

Which predefined Junos login class provides full administrative privileges?

1. operator
2. read-only
3. super-user
4. guest

Correct Answer: 3

Explanation

The super-user login class provides extensive administrative privileges on a Junos device. Users assigned to this class can perform configuration and operational tasks with broad access to the system. Other login classes provide more restricted capabilities and are appropriate when users do not require full administrative control. Using appropriate privilege levels is an important security practice because it limits unnecessary access to critical configuration and operational functions. Administrators should assign users the level of access required for their responsibilities rather than automatically granting full privileges.

Question 127

Which Junos command can be used to display the current logged-in users?

1. show users
2. show system users
3. show login users
4. show active users

Correct Answer: 2

Explanation

The show system users command displays information about users who currently have active sessions on the Junos device. It can help administrators identify who is connected, what terminal or session is being used, and other session-related information. This is different from viewing configured user accounts, which requires examining the system login configuration. Monitoring active sessions can be useful during maintenance or troubleshooting, especially when multiple administrators may be working on the same device at the same time.

Question 128

Which authentication method can use an external server to authenticate Junos users?

1. RADIUS
2. ARP
3. OSPF
4. NTP

Correct Answer: 1

Explanation

RADIUS is an authentication, authorization, and accounting protocol that can be used with external authentication servers. Junos devices can be configured to use RADIUS so that user credentials and access decisions can be managed centrally rather than maintaining every account locally. Centralized authentication can simplify administration in environments with many network devices. RADIUS can also support accounting information depending on the configuration. When external authentication is used, administrators should maintain an appropriate fallback mechanism so that authorized access remains possible if the authentication service becomes unavailable.

Question 129

Which protocol can provide centralized authentication and authorization services for network devices?

1. TACACS+
2. ARP
3. ICMP
4. NTP

Correct Answer: 1

Explanation

TACACS+ is a protocol commonly used for centralized authentication, authorization, and accounting of administrative access to network devices. It can help organizations manage administrator access from a central service rather than maintaining separate credentials on every device. TACACS+ also supports detailed authorization of administrative commands, depending on the implementation. This can be useful in environments where different administrators require different levels of access. Centralized authentication improves consistency and can simplify account management across a large network infrastructure.

Question 130

Which Junos configuration hierarchy is used to configure SSH service access?

1. system services ssh
2. protocols ssh
3. security ssh
4. access ssh

Correct Answer: 1

Explanation

The system services hierarchy contains configuration for various services provided by the Junos device, including SSH. Administrators can configure SSH access under system services ssh according to the platform and Junos release. SSH provides secure encrypted remote CLI access and is commonly used for device management. After configuring the service, the changes must be committed before they become active. Administrators should also configure appropriate authentication and access controls to ensure that remote management is properly protected.

Question 131

Which protocol should generally be preferred over Telnet for secure remote CLI access?

1. FTP
2. SSH
3. TFTP
4. HTTP

Correct Answer: 2

Explanation

SSH provides encrypted remote command-line access and is generally preferred over Telnet for secure device administration. Telnet does not provide comparable encryption for credentials and session data. SSH protects the management session by encrypting communication between the administrator and the Junos device. Secure remote access is especially important when management traffic crosses networks that are not fully trusted. Administrators should also use strong authentication and appropriate access restrictions alongside SSH to reduce the risk of unauthorized management access.

Question 132

Which service can be used to transfer files using a simple, lightweight protocol without authentication?

1. TFTP
2. SSH
3. HTTPS
4. RADIUS

Correct Answer: 1

Explanation

Trivial File Transfer Protocol, or TFTP, provides a simple mechanism for transferring files between systems. It has very little protocol overhead and does not provide the authentication and security features associated with protocols such as SSH. TFTP has historically been used for tasks such as transferring configuration or boot-related files in controlled network environments. Because it lacks strong security protections, administrators should carefully consider where and how it is used. Secure alternatives are generally more appropriate when sensitive configuration or credentials could be exposed.

Question 133

Which protocol is commonly used to securely transfer files through an SSH session?

1. TFTP
2. SCP
3. FTP
4. HTTP

Correct Answer: 2

Explanation

SCP, or Secure Copy Protocol, uses SSH to provide secure file transfer between systems. It encrypts the transfer and uses SSH authentication, making it more suitable than unencrypted file-transfer protocols when sensitive information is involved. Network administrators may use SCP to move configuration files, software packages, logs, and other supported files between systems. Because Junos platforms and releases can differ in their file-transfer capabilities, administrators should verify the supported methods for the particular device when performing software or configuration-management tasks.

Question 134

Which Junos command displays the system’s routing engine status?

1. show chassis routing-engine
2. show routing engine
3. show system routing-engine
4. show hardware engine

Correct Answer: 1

Explanation

The show chassis routing-engine command provides information about the Routing Engine on supported Junos platforms. It can display details such as Routing Engine status, CPU utilization, memory usage, model information, and other operational data depending on the platform. This information is useful when troubleshooting system performance or verifying the health of the control plane. On platforms with multiple Routing Engines, the command can also provide information about their roles and status. Routing Engine information should be considered alongside logs and other system-health data during troubleshooting.

Question 135

Which component of a Junos device performs control-plane functions such as running routing protocols?

1. Packet Forwarding Engine
2. Routing Engine
3. Interface card
4. Power supply

Correct Answer: 2

Explanation

The Routing Engine performs control-plane functions on a Junos device. It runs routing protocols, maintains routing information, handles management functions, and communicates forwarding information to the Packet Forwarding Engine. The Packet Forwarding Engine is responsible for processing and forwarding network traffic. Separating these functions allows the control plane and data plane to perform their respective roles efficiently. Understanding the difference between these components is important when diagnosing routing problems, system performance issues, and packet-forwarding behavior on Juniper platforms.

Question 136

Which component is primarily responsible for forwarding transit packets?

1. Routing Engine
2. Packet Forwarding Engine
3. Management interface
4. Console port

Correct Answer: 2

Explanation

The Packet Forwarding Engine is responsible for forwarding transit packets through the device. It uses forwarding information generated by the control plane to determine where packets should be sent. This separation allows the Routing Engine to concentrate on routing protocols, system management, and other control-plane functions while the forwarding plane handles traffic. Depending on the Juniper platform, the Packet Forwarding Engine may use specialized hardware for high-speed packet processing. Understanding this architecture helps administrators distinguish control-plane issues from data-plane forwarding problems.

Question 137

Which interface is commonly used for out-of-band management access to a network device?

1. Management interface
2. Transit interface
3. Loopback interface
4. Trunk interface

Correct Answer: 1

Explanation

A dedicated management interface can provide out-of-band access to a network device. Out-of-band management uses a separate management path rather than relying on the same interfaces that carry normal production traffic. This can be useful when troubleshooting network connectivity or when production interfaces are unavailable. Management interfaces can be connected to dedicated management networks with appropriate access controls. The exact management-interface capabilities vary by Juniper platform, so administrators should consult platform-specific documentation when configuring management access.

Question 138

Which protocol is commonly used for network monitoring and management information collection?

1. SNMP
2. SMTP
3. FTP
4. DHCP

Correct Answer: 1

Explanation

Simple Network Management Protocol, or SNMP, is commonly used to monitor and manage network devices. Management systems can use SNMP to retrieve information such as interface statistics, system status, and other operational data. Depending on the SNMP version and configuration, devices can also send notifications called traps or informs. SNMP is widely used by network-management platforms to collect information from routers, switches, and other infrastructure. Administrators should configure appropriate authentication and security controls, particularly when using SNMP in production environments.

Question 139

Which SNMP version provides stronger security features than SNMPv1 and SNMPv2c?

1. SNMPv3
2. SNMPv2
3. SNMPv1
4. SNMPv0

Correct Answer: 1

Explanation

SNMPv3 provides enhanced security features compared with the community-string-based authentication commonly associated with SNMPv1 and SNMPv2c. SNMPv3 can support authentication and privacy mechanisms that help protect management information and verify the identity of communicating parties. This makes it more appropriate for environments where stronger security controls are required. Administrators should configure SNMP carefully and limit access to authorized management systems. The exact security options depend on the Junos version and the SNMP configuration used on the device.

Question 140

Which protocol is commonly used to synchronize the clocks of network devices?

1. SNMP
2. NTP
3. DHCP
4. DNS

Correct Answer: 2

Explanation

Network Time Protocol, or NTP, synchronizes system clocks across network-connected devices. Accurate and consistent time is important for event logging, troubleshooting, authentication, monitoring, and security analysis. A Junos device can be configured to communicate with one or more NTP servers and maintain its system clock according to the received time information. When multiple devices use synchronized clocks, administrators can more easily correlate events across logs. NTP therefore provides an important supporting service for reliable network operations and centralized monitoring.