Juniper JN0-352 Practice Test | Test JN0-352 Tutorials

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Juniper JN0-352 Exam Syllabus Topics:

Section	Objectives
Topic 1: Layer 2 Security	- Port security (MAC limiting, DHCP snooping, DAI, IP source guard) - BPDU, loop and root protection - Layer 2 firewall filters - MACsec and storm control
Topic 2: Tunnels	- IP tunneling concepts - GRE and IP-IP configuration and troubleshooting
Topic 3: IS-IS	- Adjacencies and troubleshooting - Levels, areas and metrics - Link-state database and PDUs
Topic 4: Layer 2 Switching and VLANs	- Bridging components - Ports and VLAN tagging - Native VLANs and voice VLANs - Frame processing - Inter-VLAN routing
Topic 5: High Availability	- Link Aggregation Groups and RTG - VRRP, NSR, NSB and BFD - Virtual chassis and graceful restart
Topic 6: Spanning Tree	- Convergence and reconvergence - Bridge Protocol Data Units (BPDUs) - STP and RSTP concepts, roles and states
Topic 7: OSPF	- Areas and LSA types - Link-state database and packet types - Router ID, adjacencies and neighbors
Topic 8: BGP	- BGP basic operations and message types - EBGP and IBGP peer interactions - Attributes and path selection
Topic 9: Protocol-Independent Routing	- Static, aggregate, generated routes - Load balancing and filter-based forwarding - Martian addresses and RIB groups

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Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions (Q171-Q176):

NEW QUESTION # 171
You are asked to create a default route that will be advertised to your internal OSPF neighbors.
You have three upstream connections to the Internet and you must ensure that when available, all traffic uses ISP1 as your primary connection and only uses ISP2 and ISP3 when ISP1 is not available. Which solution should you implement in this scenario?

A. Create a default static route with ISP1's address as the next hop while specifying the addresses for ISP2 and ISP3 as qualified next hops with a preference value of six or higher.
B. Create a default generate route that includes an import policy to match BGP routes from ISP1 and assign a preference value of four or less.
C. Create a default aggregated route.
D. Create a default static route with each neighbor address as the next hop.

Answer: A

NEW QUESTION # 172
Referring to the exhibit, which two statements about BGP prefixes advertised by R1 to AS 65501 are true? (Choose two.)

A. R1 will modify the next-hop attribute in prefixes advertised to AS 65501
B. R1 will modify the cluster list attribute in prefixes advertised to AS 65501
C. R1 will modify the AS path attribute in prefixes advertised to AS 65501
D. R1 will modify the originator ID attribute in prefixes advertised to AS 65501

Answer: A,D

NEW QUESTION # 173
Based on the traceoptions output shown in the exhibit, what is the problem with the adjacency?

A. MTU mismatch
B. authentication mismatch
C. area mismatch
D. connectivity

Answer: C

NEW QUESTION # 174
Your router receives two BGP routes for the same prefix. One route is learned from an IBGP neighbor, and the other route is learned from an EBGP neighbor.
By default, which route will be selected as active in this scenario?

A. The route learned with the highest next-hop IP address.
B. The route with the shortest AS-path.
C. The route learned through IBGP.
D. The route learned from the neighbor with highest router ID.

Answer: B

Explanation:
Once the two candidate routes have equal route preference and equal local preference (both defaulting to 100 unless modified by policy), the Junos BGP algorithm proceeds to its third decision step, which compares the length of each candidate's AS path attribute and selects whichever path carries the shortest AS path, since a shorter path is interpreted as traversing fewer autonomous system hops to reach the origin. This step occurs well before the algorithm ever reaches the specific EBGP-over-IBGP preference rule, which is only evaluated later, after local preference, AS path length, origin type, and MED have all already been compared and found equal between the candidates; because an IBGP-learned copy of a route typically retains the identical AS path that was originally received from the external AS (IBGP does not prepend the local AS number the way crossing an AS boundary does), it is entirely possible, and often the deciding scenario, for AS path length to differ between competing paths well before the algorithm would ever need to fall back on the IBGP-versus- EBGP tiebreak. Selecting a route purely because it was 'learned through IBGP' is not a rule that exists anywhere in the algorithm and would in fact typically be the opposite of Junos's later EBGP-preference tiebreak. Neither next-hop IP address value nor router ID value is compared with a 'highest wins' rule at any point in the standard path selection sequence - where router ID is used at all, Junos prefers the lowest value, not the highest, making both of those distractors doubly incorrect. Reference topics: Junos Enterprise Routing
- BGP, Path Selection Order: AS Path Length Precedes EBGP/IBGP Preference.

NEW QUESTION # 175
You want to ensure traffic is routed through a GRE tunnel. In this scenario, which two statements will satisfy this requirement? (Choose two.)

A. Tunnel endpoints must have a route that directs traffic into the tunnel.
B. Keepalives must be used on stateless tunneling protocols.
C. All intermediary devices must have a route to the tunnel endpoints.
D. BFD must be used on the stateless tunneling protocols.

Answer: A,C

Explanation:
Option A is correct. For traffic to be sent through a GRE tunnel, there must be a route that directs the traffic into the tunnel. This is typically accomplished through the use of a static route or a dynamic routing protocol.
Option B is correct. All intermediary devices must have a route to the tunnel endpoints. In real- world scenarios, the tunnel endpoints for a tunnel going over the Internet must have globally reachable internet addresses. Otherwise, intermediate routers in the Internet cannot forward the tunneled packets.

NEW QUESTION # 176
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