Which protocol would you configure to synchronize the time and date on a Junos device?

1. A. SNMP
2. B. RIP
3. C. NTP
4. D. NMP

Correct Answer: C
The Network Time Protocol (NTP) is designed to synchronize the clocks of computers over a network. Configuring NTP on a Junos device ensures that its clock is set accurately, which is crucial for logging, troubleshooting, and maintaining the integrity of time-sensitive operations and security protocols. NTP allows devices to use a hierarchy of time sources, from primary servers synchronized to a reference clock (such as an atomic clock or GPS time) to secondary servers that distribute the time to other devices on the network.

Exhibit
[edit system archival] user@router# show configuration {
transfer-on-commit; archive-sites {
"scp://user@172.15.100.2 : /archive" password## SECRET-DATA
"ftp://user@10.210.9.178:/archive" password "$9..."; ## SECRET-DATA
.
Referring to the exhibit, where are the configuration backup files stored?

1. A. Files are storedto the SCP site and the FTP site in a round-robinmanner.
2. B. Files are storedto the SCP site and the FTP site simultaneously.
3. C. Files are storedto any site as selected by Junos internally.
4. D. Files are storedto the SCP site but if the transfer fails, then to theFTP site.

Correct Answer: B
In Junos OS, the archival configuration under [edit system] allows for the automatic backup of configuration files to designated locations upon commit. When multiple archive-sites are specified, as shown in the exhibit with both SCP and FTP sites listed, the device does not choose between them or use them in a round-robin manner. Instead, it attempts to transfer the configuration backup files to all specified sites simultaneously upon each commit. This ensures redundancy and increases the likelihood that a backup will be successfully stored even if one of the transfer methods or destinations fails.

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.

What does the user@router> clear log ospf-trace command accomplish?

1. A. Logging data into ospf-trace is stopped.
2. B. Trace parameters are removed from the OSPF protocol configuration.
3. C. Data in the ospf-trace file is removed and logging continues.
4. D. The ospf-trace file is deleted.

Correct Answer: C
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.

Which two statements are correct about firewall filters? (Choose two.)

1. A. "Discard" is the default action of packets that are not explicitly allowed.
2. B. There can be only one firewall filter.
3. C. "Accept" is the default action of packets that are not explicitly allowed.
4. D. There can be multiple firewall filters.

Correct Answer: AD
In Juniper Networks devices, firewall filters are used to control packet flow through the device. The default action for packets that do not match any of the specified criteria in the firewall filter is to discard them, enhancing network security by ensuring that only explicitly allowed traffic can pass through. Furthermore, it is possible to configure multiple firewall filters on a device, allowing for granular control over traffic based on various criteria such as source, destination, and protocol type.