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2021 Oct JN0-343 testing engine
Q261. What is the default OSPF designated router (DR) priority?
A. 0
B. 64
C. 128
D. 255
Answer: C
Q262. What is one benefit of the root protection feature?
A. It guards against loops caused by unidirectional link failures.
B. It ensures downstream switches never become the root bridge.
C. It disables the port when it detects that a loop has formed over an edge port.
D. It guards against loops caused by a changed root bridge ID.
Answer: B
Q263. You review the current LSA database and you suspect that your LSA database contains stale or invalid database entries. You need to verify that your router is receiving LSAs from other routers in your network.
Which action would you take to correct this problem?
A. Purge the LSDB.
B. Increase the max-age attribute for the LSDB.
C. Decrease the max-age attribute for the LSDB.
D. Disable and enable the interfaces.
Answer: A
Q264. By default, what is the IP time-to-live (TTL) value for an EBGP session?
A. 1
B. 63
C. 128
D. 255
Answer: A
Q265. Which protocol is a link-state routing protocol?
A. BGP
B. RIP
C. OSPF
D. MPLS
Answer: C
Latest JN0-343 book:
Q266. Router-A has an OSPF route to destination 172.18.3.0/24 with four equal-cost paths .How will Router-A forward traffic destined to 172.18.3.5 based on Junos OS's default behavior?
A. Traffic will be load-balanced on all four available paths.
B. Traffic will be forwarded over the one path installed in the forwarding table.
C. Traffic forwarding will be rotated across each of the four paths for 1 minute on each path.
D. Traffic forwarding behavior depends on the hardware platform.
Answer: B
Q267. Which statement describes the default Junos OS behavior for OSPF?
A. External LSAs are advertised in a stub area.
B. An ABR does not announce a default route into a stub area.
C. Stub area internal routers generate a default route.
D. Only totally stubby areas need a default route.
Answer: B
Q268. Which two statements are correct about how EX Series switches support STP and RSTP interoperability? (Choose two.)
A. A switch running only STP accepts RSTP BPDUs and discards the RSTP-specific information.
B. A switch running only STP discards RSTP BPDUs.
C. A switch running RSTP accepts STP BPDUs and responds using STP BPDUs.
D. A switch running RSTP accepts STP BPDUs and responds using RSTP BPDUs.
Answer: BC
Q269. On Switch-1, all configured interfaces belong to the default VLAN. Based on the topology and bridge table shown in the exhibit, which two operations will Switch-1 perform if it receives a frame sent by User A with a destination MAC address of 00:26:88:02:74:89? (Choose two.)
A. Switch-1 will flood the frame out all switch ports that belong to the default VLAN.
B. Switch-1 will flood the frame out all switch ports except ge-0/0/6.0.
C. Switch-1 will forward the frame out ge-0/0/9.0.
D. Switch-1 will update its bridge table with a new MAC entry for the device associated with User
Answer: BD
Q270. Your Junos device runs OSPF and BGP. You must limit the number of BGP prefixes within the 10.0.0.0/8 address block to be redistributed into OSPF.
Which parameter would help to control this potential problem?
A. overload, applied within the OSPF configuration
B. area-range 10.0.0.0/8 restrict, applied within the OSPF configuration
C. prefix-export-limit, applied within the OSPF configuration
D. prefix-limit, applied within the BGP configuration
Answer: C