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2021 Sep JN0-343 testing engine
Q261. You have a traditional 3-tier network design.
What are two functions of the aggregation layer? (Choose two.)
A. It functions as the gateway to the WAN edge.
B. It connects access layer switches.
C. It provides inter-VLAN routing.
D. It facilitates device access.
Answer: BC
Q262. -- Exhibit –
-- Exhbit --
You have just connected and powered on four EX Series switches as shown in the exhibit. All of the switches have booted at the same time and have the default STP configuration.
Which two statements describe the STP roles of the switches?
A. The port connecting Switch A to Switch B is Switch A's root port.
B. The port connecting Switch A to Switch C is Switch A's root port.
C. The port connecting Switch A to Switch C is Switch C's root port.
D. The port connecting Switch C to Switch B is Switch C's designated port.
Answer: BD
Q263. -- Exhibit --[edit]
user@R1# show interfaces ge-0/0/1
unit 0 {
family inet {
address 10.10.10.1/24 {
vrrp-group 10 {
virtual-address 10.10.10.254;
priority 254;
}
}
}
}
[edit]
user@R2# show interfaces ge-0/0/1
unit 0 {
family inet {
address 10.10.10.2/24 {
vrrp-group 10 {
virtual-address 10.10.10.254;
priority 1;
}
}
}
}
-- Exhibit --
Using the configuration details shown in the exhibit, which two statements are true? (Choose two.)
A. R1 will become the master VRRP router.
B. R2 will become the master VRRP router.
C. If the elected master VRRP router fails, and then returns to an operational state, it will return to the master VRRP router role.
D. If the elected master VRRP router fails, and then returns to an operational state, it will assume the backup VRRP router role.
Answer: AC
Q264. A network administrator would like to prevent certain network addresses from being part of the routing table.
Which Junos feature would be used to accomplish this task?
A. prefix lists
B. Martian addresses
C. route maps
D. static routes
Answer: B
Q265. Which three statements are true regarding RSTP and its default behavior? (Choose three.)
A. All switch ports operating in the point-to-point mode have a quicker recovery time than switch ports operating in shared mode.
B. All switch ports must pass through the listening and learning states before they can be placed in the forwarding state.
C. Edge ports are automatically placed in the forwarding state when they are operational.
D. Nonedge ports must receive at least one BPDU every six seconds to remain operational.
E. TCN BPDUs are generated and flooded when switch ports transition to the discarding state.
Answer: ACD
Refresh JN0-343 rapidshare:
Q266. 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
Q267. Which configuration correctly sets interface ge-0/0/4 in trunk mode, carrying VLANs v10 and v20?
A. ge-0/0/4 {
unit 0 {
family ethernet-switching {
vlan {
members [ v10 v20 ];
}
}
}
}
B. ge-0/0/4 {
unit 0 {
family ethernet-switching {
port-mode trunk;
vlan {
members [ v10 v20 ];
}
} } }
C. ge-0/0/4 {
vlan-tagging;
unit 0 {
family ethernet-switching {
port-mode trunk;
vlan {
members [ v10 v20 ];
}
}
}
}
D. ge-0/0/4 {
unit 10 {
family ethernet-switching;
}
unit 20 {
family ethernet-switching;
}
}
Answer: B
Q268. What is one benefit of a switched LAN?
A. It enables the LAN to forward non-IP traffic.
B. It ensures that all hosts can reach each other by flooding all traffic to all ports.
C. It limits memory use by eliminating the need for a bridging table.
D. It limits the collision domain.
Answer: D
Q269. Several routers share a common LAN segment in area 224 and have formed adjacencies using IS-IS. One router is elected as the designated intermediate system (DIS).
To which multicast address will the peers send their hello packets?
A. 224.0.0.5
B. 224.0.0.6
C. 01:80:C2:00:00:14
D. 49.0001.0224.0000.0015.00
Answer: C
Q270. You are deploying a Virtual Chassis consisting of four EX4200s. You have powered on all four switches at the same time with the settings shown in the exhibit. Which Virtual Chassis member will become the master?
A. Switch-1
B. Switch-2
C. Switch-3
D. Switch-4
Answer: D