Practice Free JN0-105 Exam Online Questions
You configured your system authentication order using the set authentication-order tacplus radius password command.
Which statement is correct in this scenario?
- A . A rejection by TACACS+ will prevent a login and bypass the other two authentication methods.
- B . The password authentication will only be used if the TACACS+ and RADIUS servers fail to respond.
- C . All authentication methods are used with the most restrictive permission set used.
- D . The password authentication method is evaluated if the TACACS+ and RADIUS servers respond with a reject message.
B
Explanation:
In the scenario where the system authentication order is set to "tacplus radius password," the correct statement is (B). If the TACACS+ and RADIUS servers are unreachable or fail to respond, the system will fall back to using password authentication. This ensures that users can still authenticate using locally stored passwords if external authentication servers are unavailable.
You want to find out the chassis serial number of a Junos device.
Which command would display this information?
- A . show chassis environment
- B . show chassis hardware
- C . show chassis routing-engine
- D . show chassis location
B
Explanation:
The show chassis hardware command in Junos OS displays detailed information about the hardware installed in the device, including the chassis itself. This command provides a list of all hardware components, their serial numbers, part numbers, and version information. When looking for the chassis serial number specifically, this command is the most direct and comprehensive way to retrieve that information, as it includes the serial number of the chassis among the details provided.
How many login classes are assignable to a user account?
- A . 3
- B . 2
- C . 4
- D . 1
C
Explanation:
Junos OS supports multiple login classes that can be assigned to user accounts, allowing for different levels of access and permissions. The correct answer is C, 4. These classes include "super-user," "read-only," "operator," and "unauthorized." Each class provides a different level of access to the Junos device, ranging from full configuration and operational command privileges to limited access for monitoring and viewing configurations.
You are creating a new policy to accept and redistribute routes into your IGP.
In this scenario, which match criteria would you use to identify the route prefixes to select?
- A . instance
- B . route-type
- C . neighbor
- D . route-filter
D
Explanation:
When creating a policy to accept and redistribute routes into your IGP, "route-filter" (D) is the match criteria used to identify specific route prefixes. Route filters enable you to specify which routes should be accepted, rejected, or modified based on their attributes, such as prefix length or value.
Which type of device uses the destination IP address to forward packets?
- A . Layer 3 router
- B . Layer 2 switch
- C . repeater
- D . hub
A
Explanation:
A Layer 3 router uses the destination IP address to forward packets. The correct answer is A. Routers operate at Layer 3 of the OSI model and make forwarding decisions based on IP addresses. They are responsible for routing packets across different networks by examining the destination IP address contained in the packet’s header.
You have just increased the MTU size of interface ge-0/0/0 and committed the configuration.
Which command would help you identify the applied MTU change?
- A . monitor interface ge-0/0/0
- B . monitor traffic interface ge-0/0/0
- C . show interfaces ge-0/0/0 terse
- D . show interfaces ge-0/0/0
D
Explanation:
After increasing the MTU size of an interface and committing the configuration, the command to verify the applied MTU change is D, "show interfaces ge-0/0/0." This command displays detailed information about the interface, including the current MTU size, making it the best choice for verifying the applied changes.
Exhibit
user@router> show route 192.168.100.2
inet.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 100
AS path: 65102 I, validation-state: unverified > to 172.16.1.6 via ge-0/0/1.0
Referring 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.
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.
Exhibit
policy-options {policy-statement Load-Balance-Policy {term Load-Balance {then {load-balance per- flow; accept;
}
}
}
}
routing-options {
router-id 192.168.100.11; autonomous-system 65201; forwarding-table {
export Load-Balance-Policy;
Referring to the exhibit, which two statements are correct? (Choose two.)
- A . The policy enables equal cost load balancing in the forwarding table.
- B . The policy must be applied under the protocols hierarchy.
- C . The policy enables per-packet load balancing.
- D . The policy enables flow-based load balancing.
A
Explanation:
The load-balance per-flow statement in the Junos OS policy-options configuration enables flow-based load balancing in the forwarding table. This means that the traffic is distributed across multiple paths based on flows, where a flow is typically identified by attributes such as source and destination IP addresses, and possibly layer 4 information like TCP/UDP ports. This allows for more granular and efficient utilization of available paths, avoiding overloading a single path. The policy does not enable per-packet load balancing, which would send individual packets of the same flow over different paths, potentially causing out-of-order delivery issues. The policy’s placement in the forwarding-table export suggests it’s intended to influence forwarding behavior, not just routing protocol decisions, and does not necessarily have to be applied under the protocols hierarchy.
By default, how does the PFE manage unicast traffic destined for an existing forwarding table entry?
- A . It sends the traffic through multiple ports toward its destination.
- B . It sends the traffic through one port toward its destination.
- C . It sends the traffic through the f xpl interface to the RE.
- D . It sends all traffic to the control plane for further processing.
B
Explanation:
In a Juniper Networks device, the Packet Forwarding Engine (PFE) processes unicast traffic by forwarding it according to the existing entries in the forwarding table. When the PFE encounters unicast traffic destined for an address that has a corresponding entry in the forwarding table, it directs the traffic through a specific outgoing interface or port toward its destination. This process is based on the most efficient path determined by the routing protocols in use, ensuring that the packet reaches its intended destination through a singular path, unless specific configurations such as load balancing are in place.
Which process in the Junos OS is responsible for maintaining routing protocols and tables?
- A . mgd
- B . chassisd
- C . rpd
- D . dcd
C
Explanation:
The Routing Protocol Daemon (rpd) in Junos OS is responsible for maintaining routing protocols and tables. It handles all routing information, including the calculation of routes and the population of the routing table, making it crucial for dynamic routing operations.