JN0-105 시험 - Juniper실제시험문제와 답 - 65문항

Question No : 1

Which three benefits occur when operating an interior gateway protocol (IGP) in an autonomous system (AS)? (Choose three.)

A.IGPs automatically distribute static routing information.
B.IGPs determine the optimal paths for data transmission.
C.IGPs learn prefixes in the global Internet's routing table.
D.IGPs react very fast to network change.
E.IGPs learn everything about the subnets and best paths within your network.

정답:
Explanation:
Operating an Interior Gateway Protocol (IGP) within an Autonomous System (AS) provides several benefits, including determining the optimal paths for data transmission (B), reacting quickly to network changes (D), and learning all about the subnets and best paths within the network (E). IGPs are designed to manage routing within a single AS efficiently, adapting to changes and ensuring data is routed through the best available paths.

Question No : 2

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.

정답:
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.

Question No : 3

You need to recover the root password on a Junos router without losing the current configuration settings.
Which three statements describe what you should perform in this scenario? (Choose three.)

A.Enter and commit the new root password.
B.Load the factory-default configuration.
C.Upgrade the Junos OS to the latest version.
D.Hit the space bar and enter recovery when prompted.
E.Use a console connection to reboot the device.

정답:
Explanation:
To recover the root password on a Junos router without losing the configuration, you should (A) enter and commit the new root password once you have gained access to the system, (D) hit the space bar to interrupt the boot process and enter recovery mode when prompted during the boot process, and (E) use a console connection to reboot the device and access the bootloader prompt. These steps allow you to reset the root password while preserving the existing configuration.

Question No : 4

What are two examples of exception traffic? (Choose two.)

A.transit packets
B.routing updates
C.log messages
D.ping to the local device

정답:
Explanation:
Exception traffic includes traffic that is not simply forwarded by the router but requires special handling, such as routing updates (B) and log messages (C). These types of traffic are processed by the router's control plane rather than just being forwarded through the data plane.

Question No : 5

What is the primary system log file that is present in the default configuration of a Junos device?

A.kmd
B.messages
C.vrrp
D.jsrpd

정답:
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 No : 6

+ apply-groups-except Don't inherit configuration data from these groups
{hold:node0}[edit]
root#
You are unable to remotely access your Juniper device using the CLI.
Referring to the exhibit, which command would you add to the existing configuration to enable remote CLI access?

A.load factory-default
B.set system root-authentication plain-text-password
C.set system services ssh
D.set system login idle-timeout 20

정답:
Explanation:
In Junos OS, remote access to the device's CLI is commonly facilitated through Secure Shell (SSH), a protocol providing secure command-line access over an insecure network. The given exhibit indicates an attempt to set a root authentication password but does not show configuration for enabling remote access services. To enable SSH, which is not shown in the configuration snippet, you need to configure the device to accept SSH connections. This is done by enabling the SSH service within the system services hierarchy of the configuration. The correct command to add to the existing configuration for enabling remote CLI access via SSH is set system services ssh. This command activates the SSH service, allowing secure remote logins to the device.

Question No : 7

You issue the monitor traffic interface ge-0/0/0 command.
What will this command accomplish?

A.It displays real-time statistics for interface ge-0/0/0.
B.It displays an operational summary of ge-0/0/0.
C.It displays the MTU and MAC address for ge-0/0/0.
D.It displays a packet capture on interface ge-0/0/0.

정답:
Explanation:
The command "monitor traffic interface ge-0/0/0" (D) initiates a packet capture on the specified interface, allowing you to view the actual packets being transmitted and received. This is useful for troubleshooting and analyzing the traffic passing through the interface in real time.

Question No : 8

Which two addresses are included in an Ethernet frame header? (Choose two.)

A.source IP address
B.source MAC address
C.destination IP address
D.destination MAC address

정답:
Explanation:
An Ethernet frame header includes the source MAC address (B) and the destination MAC address (D). These addresses are used to deliver the frame from one Ethernet device to another directly connected Ethernet device on the same network segment. Ethernet frames do not include IP addresses, as those are part of the IP packet encapsulated within the Ethernet frame.

Question No : 9

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

정답:
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.

Question No : 10

What are two attributes of the UDP protocol? (Choose two.)

A.UDP is more reliable than TC
B.UDP is always slower than TC
C.UDP is best effort.
D.UDP is connectionless.

정답:
Explanation:
UDP (User Datagram Protocol) is known for being connectionless (D) and providing best-effort delivery without the reliability mechanisms present in TCP (C). This means that UDP does not establish a connection before sending data and does not guarantee delivery, order, or error checking, making it faster but less reliable than TCP.

Question No : 11

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.

정답:
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 No : 12

What is the maximum number of rollback configuration files that the Junos OS will store?

A.65
B.50
C.25
D.19

정답:
Explanation:
Junos OS can store up to 50 rollback configuration files, making B the correct answer. These rollback files allow administrators to revert to previous configurations, providing a safety net that facilitates recovery from configuration errors or undesired changes

Question No : 13

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

정답:
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 No : 14

What will the request system configuration rescue save command do?

A.It saves the most recently committed configuration as the rescue configuration.
B.It saves the candidate configuration as the rescue configuration.
C.It saves a configuration version prior to the configuration most recently committed as the rescue configuration.
D.It activates the rescue configuration.

정답:
Explanation:
The "request system configuration rescue save" command in Junos OS saves the most recently committed configuration as the rescue configuration, making A the correct answer. This feature allows administrators to set a known good configuration that can be quickly reverted to in case of configuration errors or issues.

Question No : 15

When considering routing tables and forwarding tables, which two statements are correct? (Choose two.)

A.The routing table is used by the RE to select the best route.
B.The forwarding table stores all routes and prefixes from all protocols.
C.The forwarding table is used by the RE to select the best route.
D.The routing table stores all routes and prefixes from all protocols.

정답:
Explanation:
The routing table and forwarding table play distinct roles in a Junos OS device. The correct answers are A and D. The routing table (A) is used by the Routing Engine (RE) to select the best route among all the learned routes, while the routing table (D) stores all routes and prefixes learned from all routing protocols. The forwarding table, in contrast, contains only the active routes chosen by the RE and is used by the Packet Forwarding Engine for actual packet forwarding.

Juniper JN0-105 시험