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2021 Sep JN0-343 study guide
Q21. What are two considerations for determining the master router in VRRP? (Choose two.)
A. The router with a lower priority value.
B. The router with a higher priority value.
C. The router with the lowest IP address configured in the VRRP group.
D. Any router that has the no-preempt configuration option set.
Answer: BD
Q22. Which type of protocol is OSPF?
A. link-state protocol
B. distance-vector protocol
C. path-vector protocol
D. modified distance-vector protocol
Answer: A
Q23. When using the factory-default configuration, which VLAN is assigned to all interfaces on an EX Series switch?
A. vlan1
B. native
C. default
D. unnumbered
Answer: C
Q24. Which of the following is a spanning tree option in EX Series switches?
A. MAC move limiting
B. root protection
C. root guard
D. BPDU source guard
Answer: B
Q25. You want to enable IS-IS on your Junos device, with ge-0/0/1 as a Level 2 only interface.
Which commands are necessary?
A. set interfaces lo0 unit 0 family iso address 49.0001.0921.0168.0201.00 set interfaces ge-0/0/1 unit 0 family iso set protocols isis interface ge-0/0/1 level 1 disable
B. set protocols isis interface ge-0/0/1 enable set interfaces lo0 unit 0 family iso address 49.0001.0921.0168.0201.00 set interfaces ge-0/0/1 unit 0 family iso level 1 disable
C. set interfaces lo0 unit 0 family iso address 49.0001.0921.0168.0201.00 set interfaces ge-0/0/1 unit 0 family iso level 2
D. set protocols isis interface ge-0/0/1 enable set interfaces lo0 unit 0 family iso address 49.0001.0921.0168.0201.00 set interfaces ge-0/0/1 unit 0 family iso level 2
Answer: A
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Q26. Which statement describes an OSPF area for which no-summaries is configured?
A. The ABR does not generate any Summary (Type 3) LSAs towards the backbone.
B. The ABR does not generate any Summary (Type 3) LSAs for other OSPF areas.
C. The area does not summarize external routes generated within its area.
D. The area does not accept or create summaries of any kind.
Answer: B
Q27. Your security department has identified an increase in IP spoofing attacks.
Which feature should you enable with DHCP snooping to prevent these attacks?
A. ARP spoofing
B. DHCP option 82
C. MAC limiting
D. IP source guard
Answer: D
Q28. Router 2 is receiving two announcements of a route to 10.0.0.0/8. Router 2 learned one version of the route from ISP-2; this announcement of the route was received first. The second announcement of the route was received from Router 1 using IBGP. What will Router 2 do with the routes shown in the exhibit?
A. Router 2 will choose to forward traffic toward ISP 2 because this route was learned first.
B. Router 2 will choose to forward traffic toward Router 1 because newer routes are preferable.
C. Router 2 will choose to forward traffic toward ISP 2 because EBGP-learned routes are preferred over IBGP-learned routes.
D. Router 2 will choose to forward traffic toward Router 1 because IBGP-learned routes are preferred over EBGP-learned routes.
Answer: C
Q29. When two OSPF routers on a broadcast network are ready to exchange database descriptor packets, which router is responsible for setting the initial sequence number?
A. the DR
B. the BDR
C. the router with the higher RID
D. the router with the lower RID
Answer: C
Q30. Which two pieces of information are communicated by IS-IS TLVs? (Choose two.)
A. network protocols supported
B. designated router priority
C. authentication key
D. PDU Length
Answer: AC