QUIZ PROFESSIONAL JUNIPER - JN0-281 - DATA CENTER, ASSOCIATE (JNCIA-DC) VALID GUIDE FILES

Quiz Professional Juniper - JN0-281 - Data Center, Associate (JNCIA-DC) Valid Guide Files

Quiz Professional Juniper - JN0-281 - Data Center, Associate (JNCIA-DC) Valid Guide Files

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Tags: JN0-281 Valid Guide Files, JN0-281 Exam Pass4sure, JN0-281 Valid Braindumps Ebook, Training JN0-281 Kit, Frequent JN0-281 Updates

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q109-Q114):

NEW QUESTION # 109
Which of the following are true about Layer 2 and Layer 3 strategies in data center architectures? (Choose two)

  • A. Layer 2 strategies are primarily used for inter-data center connectivity.
  • B. Layer 2 strategies are typically used for creating large, flat networks.
  • C. Layer 3 strategies cannot be used in conjunction with Layer 2 environments.
  • D. Layer 3 strategies help in reducing broadcast domains.

Answer: B,D


NEW QUESTION # 110
MACsec provides protection against which two types of threats? (Choose two.)

  • A. Man-in-the-middle attack
  • B. Playback attacks
  • C. Data decryption
  • D. Hashing attacks

Answer: A,B

Explanation:
MACsec (Media Access Control Security) provides data confidentiality, integrity, and origin authenticity at Layer 2, protecting against several types of threats.
Step-by-Step Breakdown:
Man-in-the-Middle Attack Protection:
MACsec encrypts traffic at Layer 2, preventing man-in-the-middle attacks where an attacker intercepts and manipulates traffic between two communicating devices. Since the data is encrypted, any intercepted packets are unreadable.
Protection Against Playback Attacks:
MACsec also protects against playback attacks by using sequence numbers and timestamps to ensure that old, replayed packets are not accepted by the receiver. Juniper Reference: MACsec Configuration: Juniper devices support MACsec for securing Layer 2 communications, ensuring protection against replay and man-in-the-middle attacks in sensitive environments.


NEW QUESTION # 111
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 # 112
Which two statements are correct about using LACP on a Junos device? (Choose two.)

  • A. LACP is used to monitor the status of an aggregated Ethernet bundle's member interfaces on a Junos device.
  • B. One side of the LACP session must be in active mode to exchange LACP packets on a Junos device.
  • C. LACP is used to automatically add and delete interfaces from aggregated Ethernet bundles on a Junos device.
  • D. Both sides of the LACP session must be in active mode to exchange LACP packets on a Junos device.

Answer: A,B


NEW QUESTION # 113
A switch receives a frame with a MAC address of FF-FF-FF-FF-FF-FF.
Which action will the switch take on this frame?

  • A. It will flood it out of all interfaces, except for the directly connected VLAN.
  • B. It will flood it out of all interfaces, except for the next-hop interface.
  • C. It will flood it out of all interfaces, except for the ingress interface.
  • D. It will flood it out of all interfaces.

Answer: C

Explanation:
A MAC address of FF-FF-FF-FF-FF-FF is the Ethernet broadcast address. When a switch receives a frame with this destination MAC address, it is required to forward the frame to all interfaces except the one it was received on.
Step-by-Step Breakdown: Broadcast Frame Handling:
When a frame with the broadcast MAC address is received, the switch will flood it out of all active ports that belong to the same VLAN as the incoming frame. The broadcast frame is not sent back out of the ingress interface (the interface where the frame was originally received).
Purpose of Flooding:
Broadcasting is used to ensure that the frame reaches all devices within the broadcast domain (all devices within the same VLAN), which may not have a specific entry for the MAC address in their MAC address table.
Juniper
Reference: Layer 2 Frame Forwarding: Juniper switches flood broadcast frames to all ports in the same VLAN, except the port the frame was received on.


NEW QUESTION # 114
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