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| Certification Vendor: | Juniper Networks |
|---|---|
| Exam Name: | JNCIA-Junos (Junos, Associate) Exam |
| Exam Number: | JN0-106 |
| Exam Format: | Scenario-based questions, Multiple choice |
| Exam Duration: | 90 minutes |
| Passing Score: | Approximately 60–70% (exact score not publicly fixed) |
| Available Languages: | English |
| Certificate Validity Period: | 3 years |
| Exam Price: | $200 USD (may vary by region) |
| Real Exam Qty: | Approximately 65 multiple-choice questions |
| Related Certifications: | JNCIP-Junos JNCIE-Junos JNCIS-Junos |
| Recommended Training: | Juniper Day One Books (Junos Fundamentals) Juniper Official JNCIA-Junos Training |
| Exam Registration: | Juniper Certification Portal Pearson VUE Exam Registration |
| Sample Questions: | Juniper JN0-106 Sample Questions |
| Exam Way: | Computer-based testing at authorized testing centers or online proctored exam (availability may vary by region). |
| Pre Condition: | No formal prerequisites required; basic networking knowledge recommended. |
| Official Syllabus URL: | https://www.juniper.net/us/en/training/certification/certification-tracks/junos-certification-track.html |
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NEW QUESTION # 90
Which two statements correctly describe how Junos OS handles control and forwarding functions? (Choose two.)
Answer: A,B
Explanation:
The Packet Forwarding Engine uses forwarding tables provided by the Routing Engine to forward traffic efficiently. The Routing Engine maintains routing tables and runs routing protocols as part of control plane operations.
NEW QUESTION # 91
Which two types of traffic are processed by the Routing Engine? (Choose two.)
Answer: C,D
Explanation:
The Routing Engine (RE) is the control-plane component of a Junos OS device. Its primary responsibilities include routing protocol processing, system management, maintaining routing tables, running Junos OS processes, and providing administrative access. Consequently, management traffic and control traffic are processed by the Routing Engine. Juniper specifically describes the Routing Engine as controlling routing updates and system management , while routing protocol packets from the network are directed to the Routing Engine.
Management traffic includes traffic associated with services such as SSH, Telnet, SNMP, and other traffic whose destination is the device itself. Control traffic includes routing protocol communications such as OSPF, BGP, and other protocol packets required to establish and maintain the device ' s control-plane state. Juniper categorizes these as local packets , which are handled by the Routing Engine.
By contrast, transit traffic enters one physical interface and is forwarded toward another destination. This forwarding operation is normally handled by the Packet Forwarding Engine (PFE) rather than the Routing Engine. The separation of forwarding and control functions is fundamental to Junos OS architecture.
Study Guide Reference Topics: Junos OS Fundamentals - Routing Engine and Packet Forwarding Engine; control plane versus forwarding plane; management and protocol traffic.
NEW QUESTION # 92
Which statement describes the primary purpose of a routing policy in Junos OS?
Answer: C
Explanation:
In Junos OS, a routing policy is a powerful tool used to manage the flow of routing information between the Routing Information Base (RIB) and routing protocols. Unlike forwarding decisions, which are handled by the Packet Forwarding Engine, routing policies function within the control plane on the Routing Engine. Their primary purpose is to define specific criteria for importing routes into the routing table from neighbors or exporting routes from the routing table to neighbors.
Routing policies consist of terms containing from (match) and then (action) statements. They allow administrators to filter prefixes (e.g., denying specific BGP routes), modify route attributes (e.g., changing OSPF metrics or BGP communities), and manipulate path selection behavior. For example, an export policy might be used to ensure that only specific internal subnets are advertised to an ISP via BGP, preventing the accidental leakage of private infrastructure addresses. By default, Junos applies " default policies " for each protocol (such as OSPF accepting all OSPF routes), but custom policies allow for granular control over how the device interacts with the rest of the network. This ensures that the routing table contains only the desired paths for optimal traffic engineering.
Reference: Routing Policy and Firewall Filters, Policy Framework.
NEW QUESTION # 93
Which routing table is used for IPv6 unicast routes by default?
Answer: D
Explanation:
The inet6.0 routing table is the default table used by Junos OS to store IPv6 unicast routes.
NEW QUESTION # 94
What is the purpose of an ARP packet?
Answer: A
Explanation:
The Address Resolution Protocol (ARP) is a fundamental Layer 2 utility used within the IPv4 suite to resolve a known network-layer (Layer 3) address to its corresponding physical media access control (MAC) or hardware address (Layer 2). In a typical Ethernet environment, when a Junos device needs to forward a packet to a next-hop on a local subnet, the Packet Forwarding Engine (PFE) requires the destination MAC address to properly encapsulate the frame.
The process begins with an ARP Request, which is broadcast to all hosts on the segment asking,
"Who owns this IP address?" The host assigned that specific IP responds with an ARP Reply containing its MAC address. The Junos device then stores this mapping in its ARP cache (viewable via the show arp command) to avoid repeated broadcasts for subsequent packets. This resolution is essential because while IP addresses facilitate end-to-end logical routing, the actual delivery of data across a physical wire or switch fabric relies entirely on hardware addresses.
Without successful ARP resolution, the device cannot complete the Layer 2 header, and the traffic will be dropped as "encapsulation failed."
NEW QUESTION # 95
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