You received a new Junos device and are configuring the system-related settings. You must configure this device for the current date and time on the US West coast. You have set the time zone to America/Los_Angeies. however the time and date did not change.
In this scenario, which two additional actions would satisfy this requirement? (Choose two.)

1. A. Set the date and time setting manually.
2. B. Configure an NTP server.
3. C. Configure a DNS server.
4. D. Reboot the device.

Correct Answer: AB
When configuring the system-related settings for the current date and time on a Junos device, especially for a specific time zone like America/Los_Angeles, and the time does not automatically adjust, two effective actions can be taken. Firstly, setting the date and time manually allows for immediate correction of the system clock. This can be done via the CLI with the appropriate set date and time command. Secondly, configuring the device to use an NTP server can provide ongoing synchronization with an accurate time source, ensuring that the device maintains the correct time and date automatically in the future, even in the case of restarts or minor drifts in the internal clock.

Exhibit.

Referring to the exhibit, which routing configuration is required for these two users to access the remote server?

1. A. Users must connect directly to the router.
2. B. Users and the server require a default gateway.
3. C. Trunk ports must be enabled on the switch.
4. D. A routing protocol must be enabled on the router.

Correct Answer: B
For the users in the 10.1.1.0/24 subnet and the server in the 10.1.2.0/24 subnet to communicate with each other, they need to route packets through the router that connects these two subnets. Each user and the server need to have their default gateway set to the IP address of the router interface on their respective subnet (.254). This ensures that packets destined for other subnets are sent to the router, which then routes them to the correct destination subnet.
References:
✑ Juniper official documentation: Configuring Basic Routing.
✑ General networking principles.

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

1. A. Switches use the Address Resolution Protocol table to assign MAC addresses to network interface cards in the forwarding frame.
2. B. The source and destination MAC addresses always remains static to the final destination.
3. C. The MAC address identifies the physical hardware.
4. D. Switches use the destination MAC address to identify the next-hop destination and to change the destination MAC address in the frame.

Correct Answer: CD
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.

Which two statements about route preference in Junos are correct? (Choose two.)

1. A. Both direct and static routes have the same preference.
2. B. Both direct and local routes have the same preference.
3. C. Both OSPF internal and OSPF AS external routes have the same preference.
4. D. Both EBGP and IBGP routes have the same preference.

Correct Answer: BC
In Junos OS, route preference (also known as administrative distance) is used to determine the preferred route among multiple routes to the same destination learned via different routing protocols. Direct and local routes, which represent directly connected networks and interfaces, typically share the same low preference value, indicating high trustworthiness because they are directly connected to the router. OSPF internal routes (routes within the same OSPF area) and OSPF AS external routes (routes that are external to the OSPF autonomous system but redistributed into OSPF) also share the same preference value, although this value is higher (indicating less trust) than for direct and local routes. This distinction helps the routing engine decide which routes to use when multiple paths are available.

Which two functions are performed by the PFE? (Choose two.)

1. A. It implements firewall filters.
2. B. It selects active routes.
3. C. It forwards transit traffic.
4. D. It maintains the routing table.

Correct Answer: AC
The Packet Forwarding Engine (PFE) in Junos OS performs several key functions, including implementing firewall filters (A) and forwarding transit traffic (C). The PFE applies firewall filter rules to incoming and outgoing traffic and is responsible for the high-speed forwarding of packets based on the information in the forwarding table.