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2021 Oct JN0-343 sample question
Q91. Which mechanism keeps a switch from forwarding Layer 2 traffic from one broadcast domain to another?
A. filtering
B. BPDU guard
C. aging
D. learning
Answer: A
Q92. At which configuration hierarchy level is a static bridge table entry configured?
A. [ interfaces interface-name ]
B. [ protocols ]
C. [ ethernet-switching-options ]
D. [ forwarding-options ]
Answer: C
Q93. All OSPF routers shown in the exhibit booted at the same time, and the network has stabilized.
How many adjacencies does R1 have?
A. 0
B. 1
C. 2
D. 3
Answer: C
Q94. Which three parameters are used by the Junos OS to distinguish traffic flows for load balancing with load-balance per-packet configured? (Choose three).
A. incoming interface
B. destination address
C. destination port
D. source address
E. source port
Answer: ABD
Q95. You are viewing the Ethernet switching table and notice that a previous entry is no longer listed. What is a valid reason for an entry to be removed from the table?
A. The learning limit is exceeded.
B. The filtering threshold is exceeded.
C. The MAC aging timer expired.
D. The ARP aging timer expired.
Answer: C
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Q96. Two routers have established a peering using EBGP over a single T1 link.
How often will the routing table be synchronized between the two routers?
A. every 30 minutes
B. when an update message is received
C. every 30 seconds
D. when a notification message is received
Answer: B
Q97. Which port is selected as the designated port if a designated bridge has multiple ports connected to a LAN segment?
A. The port with the highest port ID
B. The port with the highest MAC address
C. The port with the lowest port ID
D. The port with the lowest MAC address
Answer: C
Q98. Click on the Exhibit button.
Based on the exhibit, which step in the BGP route-selection process causes the router to choose the selected path?
A. MED
B. metric to next hop
C. local preference
D. neighbor ID
Answer: A
Q99. What are two valid BPDU types? (Choose two.)
A. topology change notification
B. configuration change
C. configuration
D. root bridge
Answer: AC
Q100. Which two statements are true regarding a designated intermediate system (DIS) in an IS-IS network? (Choose two.)
A. It performs a similar role to the designated router (DR) in OSPF.
B. It is not allowed to send any PDUs on a designated intermediate system (DIS).
C. A backup DIS is not elected.
D. DIS selection uses the router's IP address as a tiebreaker.
Answer: AC