Juniper JN0-105 Exam Practice Test Instant Access

Question 1

Which two statements are correct about MAC addresses? (Choose two.)

ASwitches use the Address Resolution Protocol table to assign MAC addresses to network interface cards in the forwarding frame.

BThe source and destination MAC addresses always remains static to the final destination.

CThe MAC address identifies the physical hardware.

DSwitches use the destination MAC address to identify the next-hop destination and to change the destination MAC address in the frame.

Answer : C, D

MAC (Media Access Control) addresses are unique identifiers assigned to network interfaces for communications at the data link layer of a network segment. MAC addresses are used to identify the physical hardware on a network. In the context of Ethernet switches, the destination MAC address in incoming frames is used to determine the appropriate output port for forwarding the frame towards its final destination. The switch does not change the destination MAC address; it uses the MAC address to make forwarding decisions within the local network segment.

Question 2

What are two link-state routing protocols? (Choose two.)

ARIP

BBGP

COSPF

DIS-IS

Answer : C, D

Link-state routing protocols are a type of routing protocol used in packet-switching networks for finding the best path between source and destination. OSPF (Open Shortest Path First) and IS-IS (Intermediate System to Intermediate System) are both examples of link-state routing protocols. They work by maintaining a complete map or topology of the network, allowing routers to independently calculate the best path to each destination. Unlike distance-vector protocols like RIP, link-state protocols are more efficient and scalable, making them suitable for larger networks.

Question 3

Click the Exhibit button.

Referring to the exhibit, what is the source IP address of the ping that was executed?

A10.12.0.2

B10.23.0.2

C10.23.0.3

D10.24.0.4

Answer : B

The exhibit shows a ping test being executed from router R2 to the IP address 10.23.0.3. Since the ping command is issued on R2 and we see successful replies from 10.23.0.3, it means the source of the ping must be an interface on R2. Given the network diagram and the IP address scheme, the source IP address of the ping is on the interface ge-0/0/2 of R2, which is in the subnet 10.23.0.0/24. The only logical IP address for R2's interface in this subnet, based on standard networking practices and the given options, would be 10.23.0.2. The other addresses provided in the options belong to different subnets or are the destination of the ping itself.

Question 4

After the factory default configuration is loaded, which configuration object must be created prior to the first commit?

Aroot authentication

Bloopback IP address

Cout-of-band connectivity

Dhost name

Answer : A

In Juniper Networks devices, when the factory default configuration is loaded, the first step before committing any configuration is to set up root authentication. This is crucial because it secures the device by ensuring that only authorized users have administrative access. Without setting up a root password, the device will not allow any commit operations, which is a safety measure to prevent unauthorized access. This requirement emphasizes the importance Juniper places on security right from the initial setup of the device.

Question 5

You are logged in to a Junos OS device with SSH and issued the show protocols | compare command in the configuration, but no output is shown.

Which statement is correct in this scenario?

AThe command only works for interface configuration differences.

BThere are no changes to the candidate configuration.

CSomeone accidentally deleted the active configuration.

DYou must commit the configuration before any output will be shown.

Answer : B

The show | compare command in Junos OS is used to display the differences between the candidate configuration and the active configuration. If no output is shown when you issue this command, it means that there are no changes between the candidate configuration and the active configuration. This indicates that the candidate configuration is identical to the active configuration, and thus no differences are displayed.

'The show | compare command displays the differences between the candidate configuration and the active configuration. If there are no changes, no output is displayed.'

Question 6

Which statement is correct when multiple users are configuring a Junos device using the configure private command?

AA commit by any user will commit changes made by all active users.

BA commit will not succeed until there is only a single user in configuration mode.

CEach user gets their own candidate configuration.

DEach user shares the same candidate configuration.

Answer : C

When multiple users are configuring a Junos device using the 'configure private' command, each user gets their own candidate configuration (C). This allows for isolated configuration sessions, where changes made by one user do not impact or interfere with the changes made by another user in their private session.

Question 7

You are asked to convert the number 7 from decimal to binary.

Which number is correct in this scenario?

A00001000

B00010000

C00000111

D11100000

Answer : C

To convert the decimal number 7 to binary, the correct representation is 00000111 (C). In binary, 7 is represented as 1+2+4 (2^0 + 2^1 + 2^2), which corresponds to the last three digits being 1 in the binary format, with leading zeros added for clarity.

Juniper JN0-105 Junos, Associate Exam Practice Test