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| Certification Vendor: | Juniper Networks |
|---|---|
| Exam Name: | Data Center, Associate (JNCIA-DC) |
| Exam Number: | JN0-281 |
| Exam Duration: | 90 minutes |
| Certificate Validity Period: | 3 years |
| Passing Score: | Not publicly disclosed (variable) |
| Related Certifications: | JNCIA-DC |
| Exam Price: | $200 USD |
| Exam Format: | Multiple Choice |
| Available Languages: | English |
| Real Exam Qty: | 65 |
| Sample Questions: | Juniper JN0-281 Sample Questions |
| Exam Way: | Online (Pearson VUE) |
| Pre Condition: | No prerequisite certification required |
| Official Syllabus URL: | https://www.juniper.net/us/en/training/certification/tracks/data-center/jncia-dc.html |
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NEW QUESTION # 149
During a BGP Graceful Restart, what happens to the routes learned from the restarting neighbor?
Answer: D
NEW QUESTION # 150
Which statement is correct about areas in OSPF?
Answer: A
Explanation:
In OSPF (Open Shortest Path First), areas are used to segment a network into smaller, more manageable pieces to improve scalability. By dividing a network into areas, OSPF can reduce the size of the link-state database (LSDB), which helps routers process updates more efficiently.
Step-by-Step Breakdown:
Purpose of OSPF Areas:
OSPF areas allow for hierarchical routing within the OSPF domain. Routers in the same area have identical LSDBs, but routers in different areas do not exchange full link-state information. Instead, they exchange summarized routes, which reduces the LSDB size and CPU/memory usage.
Benefits:
Reducing the LSDB size improves scalability and ensures faster convergence in larger networks. Area 0 is the backbone area, and all other areas must connect to it, forming a hierarchical structure.
Juniper Reference:
OSPF Configuration: Areas in OSPF are configured to optimize network performance by limiting the scope of link-state advertisements (LSAs) to within an area.
NEW QUESTION # 151
Which three actions are required to implement filter-based forwarding? (Choose three.)
Answer: A,C,D
Explanation:
Filter-Based Forwarding (FBF) in Junos OS allows traffic to be routed based on specific criteria such as source address, rather than just the destination address. This is useful in scenarios like policy routing or providing multiple paths for different types of traffic. Step-by-Step Breakdown:
Instance-Type Forwarding:
You must create an instance-type forwarding routing instance. This routing instance allows for different routing tables based on the incoming packet filter.
Command:
set routing-instances FBF-instance instance-type forwarding Match Filter:
You need to create a filter to match the traffic that will be forwarded according to your custom routing policy. This filter is applied to an interface to determine which traffic will use the custom forwarding instance.
Command Example:
set firewall family inet filter FBF-filter term 1 from source-address <address> set firewall family inet filter FBF-filter term 1 then routing-instance FBF-instance RIB Group:
A RIB (Routing Information Base) group is necessary to share routes between the primary routing table and the custom routing instance. This allows FBF traffic to use the routing information from other routing tables.
Command Example:
set routing-options rib-groups FBF-group import-rib inet.0
set routing-instances FBF-instance routing-options rib-group FBF-group
Juniper
Reference: FBF Configuration: Filter-based forwarding requires these specific steps to redirect traffic to a custom routing table based on filter criteria.
NEW QUESTION # 152
Which three technologies improve high availability and convergence in a data center network? (Choose three.)
Answer: A,D,E
Explanation:
High availability and fast convergence are critical in data center networks to minimize downtime and maintain optimal performance. The following technologies contribute to achieving these goals: Graceful Restart (GR):
GR allows routers to maintain forwarding state during control plane restarts, ensuring continuous packet forwarding while minimizing network disruptions. Bidirectional Forwarding Detection (BFD):
BFD provides fast detection of path failures, allowing routing protocols to converge quickly by detecting link failures much faster than traditional timers. Link Aggregation Group (LAG):
LAG increases both redundancy and bandwidth by combining multiple physical links into one logical link, providing load balancing and fault tolerance.
Juniper
Reference: High Availability Techniques: These technologies are fundamental in ensuring rapid recovery and failover within Juniper-based data center environments.
NEW QUESTION # 153
Which LSA types are associated with OSPF? (Choose three)
Answer: A,C,D
NEW QUESTION # 154
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