DATA CENTER, ASSOCIATE (JNCIA-DC) EXAM SIMULATORS & JN0-281 EXAM TORRENT

Data Center, Associate (JNCIA-DC) exam simulators & JN0-281 exam torrent

Data Center, Associate (JNCIA-DC) exam simulators & JN0-281 exam torrent

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q54-Q59):

NEW QUESTION # 54
In the Junos OS, which feature is used to create an alternate next hop with a unique preference for a static route?

  • A. Qualified-next-hop
  • B. Resolve
  • C. Next-hop
  • D. Preference

Answer: A

Explanation:
In Junos OS, the qualified-next-hop feature is used to specify an alternate next hop for a static route, along with a unique preference value.
Step-by-Step Breakdown:
Qualified-Next-Hop:
A qualified-next-hop allows you to define multiple next hops for a static route, each with its own preference. This provides flexibility by allowing the router to choose the best available next hop based on reachability and preference.
Use Case:
If the primary next hop becomes unreachable, the router can automatically switch to the alternate next hop defined by the qualified-next-hop with a higher preference value.
Command Example:
set routing-options static route 10.10.10.0/24 qualified-next-hop 192.168.1.1 preference 5 set routing-options static route 10.10.10.0/24 qualified-next-hop 192.168.1.2 preference 10 Preference:
The next hop with the lowest preference is chosen first. If it becomes unavailable, the router will use the higher preference next hop.
Juniper Reference:
Qualified-Next-Hop: This feature is used to configure backup or alternate next hops for static routes in Juniper devices.


NEW QUESTION # 55
Which two statements are correct about rules for EBGP and IBGP? (Choose two.)

  • A. EBGP routes are more preferred than IBGP routes.
  • B. IBGP routes are more preferred than EBGP routes.
  • C. EBGP peers have a TTL of 255, while IBGP peers have a TTL of 1.
  • D. EBGP peers have a TTL of 1, while IBGP peers have a TTL of 255.

Answer: A,D

Explanation:
EBGP (External BGP) and IBGP (Internal BGP) operate with different rules due to the nature of their relationships.
Step-by-Step Breakdown:
TTL Differences:
EBGP: By default, EBGP peers have a TTL of 1, meaning they must be directly connected, or the TTL needs to be manually increased for multihop EBGP.
IBGP: IBGP peers within the same AS have a TTL of 255, as they are expected to communicate over multiple hops within the AS.
Preference for EBGP Routes:
Routes learned via EBGP are typically preferred over IBGP routes. This is because EBGP routes are considered more reliable since they originate outside the AS, while IBGP routes are internal.
Juniper Reference:
BGP Configuration: The different handling of TTL and route preferences between EBGP and IBGP ensures proper route selection and security within Junos-based networks.


NEW QUESTION # 56
When a MAC limiting violation occurs, the switch performs which two actions by default? (Choose two.)

  • A. It causes Layer 2 loops.
  • B. The port is disabled.
  • C. It drops the packet.
  • D. No logging takes place.

Answer: B,C

Explanation:
When a MAC limiting violation occurs on a Juniper switch, the switch will perform the following actions by default:
Step-by-Step Breakdown:
Port Disabled:
When the number of MAC addresses on an interface exceeds the configured limit, the port is automatically disabled to prevent further violations. This is a protective mechanism to prevent MAC address flooding.
Packet Dropped:
Additionally, packets from the violating MAC address are dropped to prevent any further communication from that address. This ensures that only valid MAC addresses are allowed to communicate through the interface.
Example Configuration:
set ethernet-switching-options secure-access-port interface <interface-name> mac-limit 5 If more than five MAC addresses are learned, the port is disabled, and excess packets are dropped.
Juniper
Reference: MAC Limiting: When the switch detects a MAC limiting violation, it disables the port and drops further packets from the violating MAC addresses to maintain network security.


NEW QUESTION # 57
When evaluating BGP routes, what will be evaluated first?

  • A. The local preference value
  • B. The origin value
  • C. The AS path
  • D. The MED value

Answer: A

Explanation:
In BGP (Border Gateway Protocol), when evaluating multiple routes to the same destination, the first attribute that is considered is the local preference value. The local preference is a BGP attribute used to influence outbound routing decisions within an Autonomous System (AS).
Step-by-Step Breakdown:
Local Preference:
The local preference attribute is used to determine which path is preferred for traffic leaving the AS.
The higher the local preference value, the more preferred the route.
BGP Path Selection:
The BGP path selection process evaluates the following attributes in this order:
Local Preference (higher is preferred)
AS Path (shorter is preferred)
Origin (IGP > EGP > incomplete)
MED (Multi-Exit Discriminator) (lower is preferred)
Juniper
Reference: BGP Path Selection: In Junos, the local preference attribute is the first to be evaluated when determining the best path for outbound traffic.


NEW QUESTION # 58
What is the primary purpose of using aggregate routes in a network?

  • A. To dynamically adjust to network changes
  • B. To statically define a route to a specific destination
  • C. To summarize and reduce the number of routes in the routing table
  • D. To filter unwanted traffic

Answer: C


NEW QUESTION # 59
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