Free Access Juniper.JN0-349.v2022-11-12.q90 Practice Test (Page 5)

Question 16

Click the Exhibit button.

Your switches are managed using Junos Space Network Director. You want to secure the switches using a Network Director filter profile. A filter profile containing one term shown in the exhibit is deployed to ports on managed devices.
Which traffic will be accepted by the filter?

A.Traffic containing a destination MAC of 02:85:05:00:00:00/24 will be accepted.

B.Traffic containing a source MAC of 02:85:05:00:00:00/24 will be accepted.

C.No traffic will be accepted.

D.All traffic will be accepted.

Question 17

Your network is configured with dynamic ARP inspection (DAI) using the default parameters for all the DHCP and ARP related configurations. You just added a new device connected to a trunk port and configured it to obtain an IP address using DHCP.
Which two statements are correct in this scenario? (Choose two.)

A.DAI validates the ARP packets for the new device against the DHCP snooping database.

B.The DHCP server assigns the IP addressing information to the new device.

C.The ARP request and response packets for the new device will bypass DAI.

D.DHCP snooping adds the DHCP assigned IP address for the new device to its database.

Question 18

Which two situations would cause dynamic ARP inspection to drop traffic? (Choose two.)

A.if no IP-to-MAC address entry exists in the DHCP snooping database

B.if the IP address in the ARP packet is deemed invalid

C.if the requested MAC address exceeds the configured limit on the port

D.if the ARP packet comes from a port that has been configured as trusted

Question 19

Which three statements are correct about the voice VLAN feature? (Choose three.)

A.It allows the access port to accept tagged voice and untagged data packets.

B.It allows you to apply independent CoS actions to data and voice packets.

C.It can be used with LLDP-MED to dynamically assign the VLAN ID value to IP phones.

D.It allows trunk ports to accept tagged voice and untagged data packets.

E.It must use the same VLAN ID as data traffic on a defined interface.

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Bryan

Dec 16, 2022

https://supportportal.juniper.net/s/article/Connecting-EX-series-Ethernet-switches-with-VoIP-phones?language=en_US

EX-series switches support Voice over IP (VoIP). EX-series switches accommodate implementation scenarios that include an IP phone and a user’s PC connected to a single switch port. The Voice VLAN feature is used on the EX series switches for this purpose.
>The Voice VLAN enables a single access port to accept untagged data traffic as well as tagged voice traffic and associate each type of traffic with distinct and separate VLANs.
>Voice traffic can now be treated differently, generally with higher priority than common data traffic.
>VoIP also uses LLDP (Link Layer Discovery Protocol) and LLDP-MED ( Link Layer Discovery Protocol Media Endpoint Discovery) protocol information to forward VoIP parameters from the RADIUS server to the phone, for example VLAN and COS settings

Question 20

Click the Exhibit button.

You want to prevent rogue BPDUs from lab devices reaching the internal through the Lab_Switch device.
Referring to the exhibit, what should be done to accomplish this task?

A.Configure the three lab ports as edge ports

B.Configure an input filter on interface xe-0/2/0 to discard the RSTP packets

C.Configure the three lab ports under the protocols layer2-control bpdu-block hierarchy on the switch

D.Configure protocols rstp with the bpdu-block-on-edge parameter for interface xe-0/2/0

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