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Juniper JN0-649 Exam Practice Questions (P. 3)

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Question #11
You are implementing the route summarization feature of OSPF.
Which two results do you achieve in this scenario? (Choose two.)
  1. A
    It helps in migrating to future multi-area OSPF network designs.
  2. B
    It reduced the routing table size, enabling devices to store and process less information.
  3. C
    It reduces the impact of topology changes on a device.
  4. D
    It provides optimal routing in the network.

Correct Answer:
BC
chatbot-img GPT-4o - Answer
In the context of OSPF, implementing route summarization achieves primarily two outcomes. Firstly, it significantly reduces the size of routing tables, which subsequently decreases the overall memory usage and processing demands on networking devices. Secondly, by summarizing routes, the frequency and impact of topology changes broadcasted across the network are minimized, thus stabilizing the network's performance and reducing computational overhead during topology alterations. This operational efficiency is crucial for maintaining a scalable and manageable network infrastructure, particularly in larger network environments.

Question #12
Your organization has recently acquired another company. You must carry all of the company’s existing VLANs across the corporate backbone to the existing branch locations without changing addressing and with minimal configuration.
Which technology will accomplish this task?
  1. A
    Q-in-Q all-in-one bundling
  2. B
    PVLAN isolated VLAN
  3. C
    MVRP registration normal
  4. D
    EVPN-VXLAN anycast gateway

Correct Answer:
A
chatbot-img GPT-4o - Answer
Professor's Comment: Hey folks, when needing to extend multiple VLANs across a network with minimal changes, Q-in-Q tunneling is your go-to. This tech stacks two VLAN tags - one for the local VLAN and another as a service provider tag, so you can transport multiple VLANs across the same service provider link effortlessly. It's a straightforward method that keeps original VLAN configurations intact, making the integration of different networks pretty seamless. Absolutely handy for scenarios like merging company networks without a fuss!

Question #13
Your enterprise network uses routing instances to support multitenancy. Your Junos devices use BGP to peer to multiple BGP devices. You must ensure that load balancing is achieved within the routing instance.
Which two statements would accomplish this task? (Choose two.)
  1. A
    Configure the multipath option at the [edit protocols bgp group <group-name> neighbor] hierarchy.
  2. B
    Configure the multipath option at the [edit protocols bgp group] hierarchy.
  3. C
    Configure a load-balance per-packet policy and apply it at the [edit routing-options forwarding-table] hierarchy.
  4. D
    Configure the multipath option at the [edit routing-instances <instance-name> routing-options] hierarchy.

Correct Answer:
BD
chatbot-img GPT-4o - Answer
In scenarios where you're managing multitenancy using multiple BGP peers within a Junos device setting, configuring the multipath option at both the [edit protocols bgp group] and [edit routing-instances routing-options] levels ensures effective load balancing. This setup allows for the use of multiple paths in the BGP routing policy, which optimizes traffic distribution across the available networks, enhancing the overall network performance and reliability. This approach aligns precisely with BGP's capabilities in handling multiple pathways for routing instances.

Question #14
You are asked to enforce user authentication using a captive portal before users access the corporate network.
Which statement is correct in this scenario?
  1. A
    HTTPS is the default protocol for a captive portal.
  2. B
    A captive portal can be bypassed using an allowlist command containing a device’s IP address.
  3. C
    When enabled, a captive portal must be applied to each individual interface.
  4. D
    All Web browser requests are redirected to the captive portal until authentication is successful.

Correct Answer:
D
chatbot-img GPT-4o - Answer
That’s right! In scenarios where you incorporate a captive portal for network access control, all web browser requests are indeed redirected to a login page. This is where users must authenticate themselves to gain further network access. This mechanism ensures that each user’s identity is verified before they browse the corporate network, enhancing security measures. Once authenticated, users are redirected to their initially requested web page, creating a seamless user experience while maintaining strong access protocols. This redirection continues until the user is successfully authenticated, making it a crucial component of network security management.

Question #15
Click the Exhibition button.
Referring to the exhibit, ServerA sends a single IP packet destined to 10.0.0.127.
Which two statements correctly describe the behavior of the resulting outbound VXLAN packets that contain the original packet destined to 10.0.0.127? (Choose two.)
  1. A
    Router E will replicate and send a copy of the received VXLAN packet to router D.
  2. B
    Router C will send a VXLAN packet destined only to router D and router E.
  3. C
    Router D will not replicate and send a copy of the received VXLAN packet to router E.
  4. D
    Router C will send a single VXLAN packet to one remote VTEP.

Correct Answer:
AD

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