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  1. Home
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  3. JN0-349

Juniper JN0-349 Exam (page: 1)
Juniper Enterprise Routing and Switching, Specialist
Updated on: 26-Oct-2025

Viewing Page 1 of 21
JN0-349 PDF 110 Questions

What are two benefits of 802.3ad link aggregation? (Choose two)

  1. It increases bandwidth
  2. It ensures symmetrical paths
  3. It simplifies interface configuration.
  4. It creates physical layer redundancy.

Answer(s): A,D

Explanation:

Aggregating multiple links between physical interfaces creates a single logical point-to-point trunk link or a LAG. The LAG balances traffic across the member links within an aggregated Ethernet bundle and effectively increases the uplink bandwidth. Another advantage of link aggregation is increased availability, because the LAG is composed of multiple member links. If one member link fails, the LAG continues to carry traffic over the remaining links.


Reference:

https://www.juniper.net/documentation/us/en/software/junos/interfaces-ethernet- switches/topics/topic-map/switches-interface-aggregated.html



Click the Exhibit button.


Your router is configured to peer with your ISP’s router using BGP. You can only control your BGP configuration.

Which address families are negotiated between the two BGP peers shown in the exhibit?

  1. inet-unicast inet-vpn-unicast 12vpn-signaling
  2. inet-unicast
  3. inet-vpn-unicast
  4. inet-unicast inet-vpn-unicast 12vpn

Answer(s): B



Which statement is true about IP-IP tunnels?

  1. Intermediate devices must have a route to the destination address of the traffic being tunneled.
  2. Intermediate devices must have a route to both the tunnel source address and the tunnel destination address.
  3. Intermediate devices must have a route to the tunnel destination address but do not require a route to the tunnel source address.
  4. Intermediate devices must have a route to the tunnel source address but do not require a route to the tunnel destination address

Answer(s): B

Explanation:

Routing is based on destination, not source; Only the route for the destination tunnel endpoint is necessary for each packet. If you’re thinking about a lab environment with a single intermediary device, its incidental that it will have a route for both tunnel endpoint IPs. Only the relevant destination will be considered with each packet it processes.



You have a conference room with an open network port that is used by employees to connect to the network. You are concerned about rogue switches being connected to this port
Which two features should you enable on your switch to limit access to this port? (Choose two.)

  1. DHCP snooping
  2. dynamic ARP inspection
  3. MAC limiting
  4. 802.1X

Answer(s): A,B



Which two port security features use the DHCP snooping database for additional port security? (Choose two.)

  1. dynamic ARP inspection
  2. MACsec
  3. IP Source guard
  4. MAC learning

Answer(s): A,C



Viewing Page 1 of 21



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