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Juniper JN0-105 Sample Question Answers
Question # 1
You want to redeploy a Junos device by clearing the existing configuration and resetting it to factory defaults.In this scenario, which command would help to accomplish this task?
A. show system storage B. request systemstorage cleanup C. request systemstorage cleanup dry-run D. request systemzeroize media
Answer: D
Explanation: The request system zeroize media command on a Junos device securely
erases all data, including configuration and log files, and resets the device to its factory
default settings. This command is used when redeploying a device to ensure no residual
data remains from its previous deployment. It's a comprehensive and secure way to clear
all configurations and data, making the device as if it were new. The other commands listed
do not perform a full reset to factory defaults; for example, show system storage displays
storage information, and request system storage cleanup offers to delete unnecessary
files without resetting the device to factory settings.
Question # 2
You issue the telnet 10.10.10.1 source 192.168.100.1 command.Which two statements are correct in this scenario? (Choose two.)
A. The telnet session will have a source address of 10.10.10.1. B. The telnet session will have a destination address of 192.168.100.1. C. The telnet session will have a destination address of 10.10.10.1. D. The telnet session will have a source address of 192.168.100.1.
Answer: C,D
Explanation: In the given telnet command, "telnet 10.10.10.1 source 192.168.100.1," the
destination address of the telnet session is 10.10.10.1, and the source address of the
session is specified as 192.168.100.1, making C and D the correct answers. This
command instructs the telnet client to use the specified source IP address when
establishing the connection to the destination.
Question # 3
You have logged on to a Junos device and are at the operational mode prompt.Which two commands are used at this prompt? (Choose two.)
A. show interface ge-0/0/0 B. request system shutdown C. set interface ge-0/0/0 unit 0 family inet D. run show interface terse
Answer: A
Explanation: At the operational mode prompt on a Junos device, you can use various
commands to view the device's status and request system operations. The show interface
ge-0/0/0 command is used to display information about a specific interface, while the
request system shutdown command is used to properly shut down the device. The set
command is used in configuration mode, not operational mode, and the run command is
used to execute operational mode commands from configuration mode.
Question # 4
Exhibituser@router> show route 192.168.100.2inet.O: 15 destinations, 17 routes (15 active, 0 holddown, 0 hidden) Limit/Threshold:1048576/1048576 destinations+ = Active Route, - = Last Active, * = Both 192.168.100.2/32*[OSPF/IO] 00:14:29, metric 1> to 172.16.1.6 via ge-0/0/1.0 [BGP/170] 00:06:49, localpref 100AS path: 65102 I, validation-state: unverified > to 172.16.1.6 via ge-0/0/1.0Referring to the exhibit, which statement is correct?
A. The BGP path is the only active route. B. The BGP route is preferred over the OSPF route. C. The OSPF path is the only active route. D. / Traffic is load-balanced across two routes.
Answer: C
Explanation: Referring to the exhibit, the presence of the "+" symbol next to the OSPF
route for 192.168.100.2/32 indicates that this is the active route being used to forward
traffic. The BGP route, although present, does not have the "+" symbol, indicating it is not
the active route. In Junos OS, the routing table displays the active route with a "+" symbol,
and the fact that the OSPF route has this symbol means it is the preferred path based on
the routing protocol's decision process, which takes into account factors such as route
preference (administrative distance) and metrics.
Question # 5
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.
Answer: A,B
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 # 6
What is the primary system log file that is present in the default configuration of a Junosdevice?
A. kmd B. messages C. vrrp D. jsrpd
Answer: B
Explanation: In the default configuration of a Junos device, the primary system log file is
"messages" (B). This log file contains a wide range of system messages, including
operational status changes, system errors, and other critical information, making it a key
resource for troubleshooting and monitoring the system's health.
Question # 7
Which command modifier would you use to see all possible completions for a specificcommand?
A. | B. detail C. ? D. extensive
Answer: C
Explanation: In Junos OS, the ? command modifier is used to display all possible
completions for a specific command. This helps users understand the available options and
syntax for a command they are trying to use.
Reference: Juniper Networks CLI Documentation
"Use the ? command modifier to display all possible completions for a specific command."
Question # 8
Which two statements are correct about the empioyee@Ri> prompt? (Choose two.)
A. R1 is the hostname of your device. B. You are in operational mode. C. You are in configuration mode. D. You are at a shell prompt.
Answer: A,B
Explanation: In Junos OS, the prompt employee@R1> indicates the current context of the
user interface. The 'R1' part of the prompt signifies the hostname of the device, which in
this case is 'R1'. The absence of a '#' symbol at the end of the prompt suggests that the
user is in operational mode, as opposed to configuration mode which is indicated by a
prompt ending in '#'. Operational mode allows users to view the status of the device and
execute operational commands, but does not allow for configuration changes.
Question # 9
An administrator configures a router's interface with an IPv4 address and subnet mask.The administrator also confirms that this interface is in an up state.In this scenario, which two route types are created on the local router? (Choose two.)
A. a static route B. a local route C. a dynamic route D. a direct route
Answer: B,D
Explanation: When an interface on a router is configured with an IPv4 address and is in an
up state, two types of routes are automatically created in the routing table: a local route and
a direct route, making B and D the correct answers. The local route represents the
interface's IP address itself, indicating that the router can directly receive packets
addressed to this IP. The direct route represents the subnet or network segment to which
the interface is connected, indicating that the router can directly forward packets to
destinations within this subnet.
Question # 10
Which two common routing policy actions affect the flow of policy evaluation? (Choosetwo.)
A. next policy B. community C. next term D. next hop
Answer: A,C
Explanation: In Junos OS routing policy evaluation, "next policy" (A) and "next term" (C)
are common actions that affect the flow of policy evaluation. "Next policy" directs the
evaluation to the next policy in the sequence, whereas "next term" moves the evaluation to
the next term within the current policy, allowing for granular control over routing decisions.