Practice Free JN0-106 Exam Online Questions
Question #11
Which two statements are correct about firewall filters? (Choose two.)
- A . "Discard" is the default action of packets that are not explicitly allowed.
- B . There can be only one firewall filter.
- C . "Accept" is the default action of packets that are not explicitly allowed.
- D . There can be multiple firewall filters.
Correct Answer: A, D
A, D
Explanation:
In Juniper Networks devices, firewall filters are used to control packet flow through the device. The default action for packets that do not match any of the specified criteria in the firewall filter is to discard them, enhancing network security by ensuring that only explicitly allowed traffic can pass through. Furthermore, it is possible to configure multiple firewall filters on a device, allowing for granular control over traffic based on various criteria such as source, destination, and protocol type.
A, D
Explanation:
In Juniper Networks devices, firewall filters are used to control packet flow through the device. The default action for packets that do not match any of the specified criteria in the firewall filter is to discard them, enhancing network security by ensuring that only explicitly allowed traffic can pass through. Furthermore, it is possible to configure multiple firewall filters on a device, allowing for granular control over traffic based on various criteria such as source, destination, and protocol type.
Question #12
Which command displays all IPv6 routes in the default routing instance?
- A . showroute table inet.0
- B . showroute table inet6.1
- C . showroute table inet.1
- D . showroute table inet6.0
Correct Answer: D
D
Explanation:
The show route table inet6.0 command displays all IPv6 routes in the default routing instance. In Junos OS, the routing table for IPv6 addresses is referred to as inet6.0, whereas inet.0 is used for IPv4 unicast routes. The other options do not correspond to the correct IPv6 routing table.
Reference: Juniper official documentation: Junos OS Routing Tables Overview.
D
Explanation:
The show route table inet6.0 command displays all IPv6 routes in the default routing instance. In Junos OS, the routing table for IPv6 addresses is referred to as inet6.0, whereas inet.0 is used for IPv4 unicast routes. The other options do not correspond to the correct IPv6 routing table.
Reference: Juniper official documentation: Junos OS Routing Tables Overview.
Question #13
168.36.1/32 *[Static/5] 00:00:31
> to 10.1.1.2 via ge-0/0/10.0 [OSPF/IO] 00:02:21, metric 1 > to 10.1.1.2 via ge-0/0/10.0
Referring to the exhibit, which route(s) will be selected by Junos for packet forwarding?
- A . The OSPF route will be selected.
- B . The static route will be selected.
- C . The Junos OS randomly selects one route.
- D . The Junos OS selects both routes.
Correct Answer: B
B
Explanation:
Junos OS selects routes based on the route preference (also known as administrative distance). Static routes typically have a lower route preference than OSPF routes, meaning they are more preferred. Since the static route to 192.168.36.1/32 is shown with a preference of 5, it will be selected over the OSPF route for packet forwarding, assuming no other factors such as route filters or policies affect the routing decision.
B
Explanation:
Junos OS selects routes based on the route preference (also known as administrative distance). Static routes typically have a lower route preference than OSPF routes, meaning they are more preferred. Since the static route to 192.168.36.1/32 is shown with a preference of 5, it will be selected over the OSPF route for packet forwarding, assuming no other factors such as route filters or policies affect the routing decision.
Question #14
Which protocol would you configure to synchronize the time and date on a Junos device?
- A . SNMP
- B . RIP
- C . NTP
- D . NMP
Correct Answer: C
C
Explanation:
The Network Time Protocol (NTP) is designed to synchronize the clocks of computers over a network. Configuring NTP on a Junos device ensures that its clock is set accurately, which is crucial for logging, troubleshooting, and maintaining the integrity of time-sensitive operations and security protocols.
NTP allows devices to use a hierarchy of time sources, from primary servers synchronized to a reference clock (such as an atomic clock or GPS time) to secondary servers that distribute the time to other devices on the network.
C
Explanation:
The Network Time Protocol (NTP) is designed to synchronize the clocks of computers over a network. Configuring NTP on a Junos device ensures that its clock is set accurately, which is crucial for logging, troubleshooting, and maintaining the integrity of time-sensitive operations and security protocols.
NTP allows devices to use a hierarchy of time sources, from primary servers synchronized to a reference clock (such as an atomic clock or GPS time) to secondary servers that distribute the time to other devices on the network.
Question #15
What are two methods for navigating to configuration mode from an operational mode prompt? (Choose two.)
- A . Use the edit command.
- B . Use the quit command.
- C . Use the exit command.
- D . Use the configure command.
Correct Answer: AD
AD
Explanation:
In Junos OS, to navigate from operational mode to configuration mode, you can use either the edit or configure command. Both commands move the CLI from operational mode, where you can view the state of the device, to configuration mode, where you can make changes to the device’s configuration.
AD
Explanation:
In Junos OS, to navigate from operational mode to configuration mode, you can use either the edit or configure command. Both commands move the CLI from operational mode, where you can view the state of the device, to configuration mode, where you can make changes to the device’s configuration.
Question #16
Which of the following actions are correct about the command `request system configuration rescue save`? (Choose two)
- A . It saves the most recently committed configuration as the rescue configuration.
- B . It activates the rescue configuration.
- C . It saves a backup of the current active configuration to an external server.
- D . It saves the factory-default configuration as the rescue configuration.
Correct Answer: A, D
Question #17
What are two functions of the Routing Engine? (Choose two.)
- A . It processes all management traffic.
- B . It runs the Junos operating system.
- C . It evaluates firewall filters for transit traffic.
- D . It processes transit traffic.
Correct Answer: AB
AB
Explanation:
The Routing Engine (RE) in Junos OS has several critical functions, including processing all management traffic (A) and running the Junos operating system (B). The RE handles system management tasks, user interfaces, system services, and routing protocol processes. It does not directly process transit traffic or evaluate firewall filters for transit traffic, as these tasks are handled by the Packet Forwarding Engine (PFE).
AB
Explanation:
The Routing Engine (RE) in Junos OS has several critical functions, including processing all management traffic (A) and running the Junos operating system (B). The RE handles system management tasks, user interfaces, system services, and routing protocol processes. It does not directly process transit traffic or evaluate firewall filters for transit traffic, as these tasks are handled by the Packet Forwarding Engine (PFE).
Question #18
Which type of device uses the destination IP address to forward packets?
- A . Layer 3 router
- B . Layer 2 switch
- C . repeater
- D . hub
Correct Answer: A
A
Explanation:
A Layer 3 router forwards packets based on the destination IP address. It operates at the network layer of the OSI model and uses routing tables to determine the best path for packet delivery. Unlike Layer 2 switches, which forward packets based on MAC addresses, routers handle logical addressing, making them crucial for inter-network communication.
Reference: Junos OS Documentation on Routing Fundamentals.
A
Explanation:
A Layer 3 router forwards packets based on the destination IP address. It operates at the network layer of the OSI model and uses routing tables to determine the best path for packet delivery. Unlike Layer 2 switches, which forward packets based on MAC addresses, routers handle logical addressing, making them crucial for inter-network communication.
Reference: Junos OS Documentation on Routing Fundamentals.
Question #19
Which two external authentication methods does Junos support for administrative access? (Choose two.)
- A . TACACS+
- B . NIS
- C . RADIUS
- D . ACE
Correct Answer: AC
AC
Explanation:
Junos OS supports several external authentication methods for administrative access, with TACACS+ (Terminal Access Controller Access-Control System Plus) and RADIUS (Remote Authentication Dial-In User Service) being among the most commonly used. Both TACACS+ and RADIUS are protocols that allow network devices to communicate with a central authentication server, enabling centralized control over user authentication and authorization. This centralization simplifies the management of user credentials and access policies, especially in larger networks with multiple devices.
AC
Explanation:
Junos OS supports several external authentication methods for administrative access, with TACACS+ (Terminal Access Controller Access-Control System Plus) and RADIUS (Remote Authentication Dial-In User Service) being among the most commonly used. Both TACACS+ and RADIUS are protocols that allow network devices to communicate with a central authentication server, enabling centralized control over user authentication and authorization. This centralization simplifies the management of user credentials and access policies, especially in larger networks with multiple devices.
Question #19
Which two external authentication methods does Junos support for administrative access? (Choose two.)
- A . TACACS+
- B . NIS
- C . RADIUS
- D . ACE
Correct Answer: AC
AC
Explanation:
Junos OS supports several external authentication methods for administrative access, with TACACS+ (Terminal Access Controller Access-Control System Plus) and RADIUS (Remote Authentication Dial-In User Service) being among the most commonly used. Both TACACS+ and RADIUS are protocols that allow network devices to communicate with a central authentication server, enabling centralized control over user authentication and authorization. This centralization simplifies the management of user credentials and access policies, especially in larger networks with multiple devices.
AC
Explanation:
Junos OS supports several external authentication methods for administrative access, with TACACS+ (Terminal Access Controller Access-Control System Plus) and RADIUS (Remote Authentication Dial-In User Service) being among the most commonly used. Both TACACS+ and RADIUS are protocols that allow network devices to communicate with a central authentication server, enabling centralized control over user authentication and authorization. This centralization simplifies the management of user credentials and access policies, especially in larger networks with multiple devices.