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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
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.
What does the user@router> clear log ospf-trace command accomplish?
A. Logging data into ospf-trace is stopped.
B. Trace parameters are removed from the OSPF protocol configuration.
C. Data in the ospf-trace file is removed and logging continues.
D. The ospf-trace file is deleted.
Explanation:
The clear log ospf-trace command on a Juniper Networks router is used specifically to manage the contents of the log file named ospf-trace. Executing this command clears or deletes the existing data within the ospf-trace log file but does not stop the logging process. The router continues to log new OSPF-related events and data into this file after the command is executed. This functionality is crucial for troubleshooting and monitoring the OSPF (Open Shortest Path First) protocol's operation by allowing network administrators to remove old or irrelevant log data while continuously capturing new events without interruption.
What are two functions of the routing protocol daemon (rpd)? (Choose two.)
A. It generates chassis alarms.
B. It provides access to the CLI.
C. It creates forwarding tables.
D. It maintains routing tables.
Explanation:
The Routing Protocol Daemon (rpd) is a critical component in Juniper Networks devices, responsible for all routing operations. It maintains routing tables, which hold information about network paths and destinations derived from various routing protocols. These tables are used to make decisions about where to send packets. Additionally, rpd generates forwarding tables based on the information in the routing tables. The forwarding tables are then used by the Packet Forwarding Engine (PFE) to actually forward packets to their next hop or final destination.
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.
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.
Which statement is correct concerning exception traffic processing?
A. Exception traffic is always dropped during congestion.
B. Exception traffic is rate-limited to protect the RE.
C. Exception traffic is discarded by the PFE.
D. Exception traffic is never forwarded.
Explanation:
Exception traffic refers to packets that the Packet Forwarding Engine (PFE) cannot process normally and must be forwarded to the Routing Engine (RE) for further processing. This includes packets destined for the router itself or packets needing special handling that the PFE cannot provide. To protect the RE from being overwhelmed by such traffic, which could potentially impact the router's control plane functions, exception traffic is rate-limited. This means that there's a threshold to how much exception traffic can be sent to the RE, ensuring that the router's critical management and control functions remain stable and responsive even during high traffic volumes or attacks.
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