QUIZ JUNIPER FIRST-GRADE JN0-281 - UNLIMITED DATA CENTER, ASSOCIATE (JNCIA-DC) EXAM PRACTICE

Quiz Juniper First-grade JN0-281 - Unlimited Data Center, Associate (JNCIA-DC) Exam Practice

Quiz Juniper First-grade JN0-281 - Unlimited Data Center, Associate (JNCIA-DC) Exam Practice

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q189-Q194):

NEW QUESTION # 189
Which route is preferred by the Junos OS software routing tables?

  • A. Static
  • B. Aggregate
  • C. Direct
  • D. BGP

Answer: C

Explanation:
In Junos OS, direct routes are the most preferred routes in the routing table, having the highest priority.
Step-by-Step Breakdown:
Direct Routes:
Direct routes represent networks that are directly connected to the router's interfaces. Since these routes are directly accessible, they are assigned the highest priority and always take precedence over other types of routes.
Preference Values:
Direct routes have a preference of 0, which is the most preferred in Junos. Static routes, OSPF routes, and BGP routes have higher preference values and will only be used if there are no direct routes to the destination.
Juniper
Reference: Direct Route Preference: In Junos, direct routes are always preferred over other routes, ensuring that the router forwards traffic through locally connected networks.


NEW QUESTION # 190
Martian addresses are:

  • A. Unroutable addresses that are generally filtered by routers.
  • B. Special routes for interplanetary communication.
  • C. Addresses used for load balancing.
  • D. Addresses used in MPLS.

Answer: A


NEW QUESTION # 191
What is the main purpose of Bidirectional Forwarding Detection (BFD)?

  • A. to detect the forwarding protocol
  • B. to detect network path failures
  • C. to determine packet round-trip latency
  • D. to determine if the forwarding routes are correct

Answer: B

Explanation:
Bidirectional Forwarding Detection (BFD) is a network protocol used to detect failures in the network path between two devices quickly.
Step-by-Step Breakdown:
Path Failure Detection:
BFD provides a low-overhead mechanism for detecting failures in forwarding paths across Layer 3 networks. It is much faster than traditional routing protocol timers and can detect failures within milliseconds.
BFD in Routing:
BFD can be integrated with routing protocols like OSPF, BGP, or IS-IS to trigger a faster convergence when a network path goes down.
Juniper Reference:
BFD Configuration: Juniper devices use BFD to monitor network paths and ensure fast failure detection, enhancing network resilience.


NEW QUESTION # 192
What is a VLAN?

  • A. A multicast domain, identified by a VLAN ID
  • B. A broadcast domain, using only virtual machines
  • C. A broadcast domain, identified by a VLAN ID
  • D. A local network using only virtual machines

Answer: C


NEW QUESTION # 193
Which two statements are correct about rules for EBGP and IBGP? (Choose two.)

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

Answer: B,C

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 # 194
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