Online Access Free JN0-349 Practice Test

No.# https://www.juniper.net/documentation/us/en/software/junos/ospf/topics/topic-map/configuring-ospf-areas.html

Looks like "A" is the correct answer

To quickly configure the ABR to inject a default route into the area, copy the following command and paste it into the CLI. You apply this configuration only on the ABR.
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[edit]
set protocols ospf area 07 stub default-metric 10

(Optional) To quickly configure the ABR to restrict all summary advertisements and allow only internal routes and default route advertisements into the area, copy the following command and paste it into the CLI. You apply this configuration only on the ABR.
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[edit]
set protocols ospf area 0.0.0.7 stub no-summaries

No.# Are the hosts shown not all on the same IP subnet (172.17.21.0/24), if so, B should be correct.
If on different subnet's, which is not show in example, then A would be correct.

No.# https://www.juniper.net/documentation/us/en/software/junos/is-is/topics/concept/is-is-routing-overview.html

The following ISO addresses illustrate the IS-IS address format:
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49.0001.00a0.c96b.c490.00
49.0001.2081.9716.9018.00

NETs take several forms, depending on your network requirements. NET addresses are hexadecimal and range from 8 octets to 20 octets in length. Generally, the format consists of an authority and format Identifier (AFI), a domain ID, an area ID, a system identifier, and a selector. The simplest format omits the domain ID and is 10 octets long. For example, the NET address 49.0001.1921.6800.1001.00 consists of the following parts:

49—AFI

0001—Area ID

1921.6800.1001—System identifier

00—Selector

The system identifier must be unique within the network. For an IP-only network, we recommend using the IP address of an interface on the router. Configuring a loopback NET address with the IP address is helpful when troubleshooting is required on the network.

The first portion of the address is the area number, which is a variable number from 1 through 13 bytes. The first byte of the area number (49) is the authority and format indicator (AFI). The next bytes are the assigned domain (area) identifier, which can be from 0 through 12 bytes. In the examples above, the area identifier is 0001....

No.# https://community.juniper.net/communities/community-home/digestviewer/viewthread?MID=67987

Aggregate

Aggregate Preference: 130 <==== Both aggregate and generated routes will show the same here

Next hop type: Reject <=== default always be reject for aggregate routes; can be configured discard



Generated

Next hop type: Router, Next hop index: 546 <==== Will be type router

Next hop: x.y.y.t via ge-0/0/1.200, selected <======Will have a valid next-hop- The presence of an IP tells you it is a generated route

No.# 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

No.# https://www.juniper.net/documentation/us/en/software/junos/security-services/topics/topic-map/understanding-and-using-dai.html#id-understanding-arp-spoofing-and-inspection__d55187e63

DAI examines ARP requests and responses on the LAN and validates ARP packets. The switch intercepts ARP packets from an access port and validates them against the DHCP snooping database. If no IP-MAC entry in the database corresponds to the information in the ARP packet, DAI drops the ARP packet and the local ARP cache is not updated with the information in that packet. DAI also drops ARP packets when the IP address in the packet is invalid. ARP probe packets are not subjected to dynamic ARP inspection. The switch always forwards such packets.

Junos OS for EX Series switches and the QFX Series uses DAI for ARP packets received on access ports because these ports are untrusted by default. Trunk ports are trusted by default, and therefore ARP packets bypass DAI on them.

You configure DAI for each VLAN, not for each interface (port). By default, DAI is disabled for all VLANs.

If you set an interface to be a DHCP trusted port, it is also trusted for ARP packets....