Juniper JN0-343 問題集

質問 1：
Which three types of firewall filters are supported on EX Series switches? (Choose three.)
A. router filters
B. port filters
C. VLAN filters
D. source filters
E. switch filters
正解：A,B,C

質問 2：
You have connected a spanning-tree-enabled device to your spanning-tree-enabled switch, but the switch port does not forward traffic, even after you remove the device. Which command do you use to re-enable forwarding?
A. clear spanning-tree blocking
B. clear interface status
C. clear ethernet-switching bpdu-error
D. clear ethernet-switching port-error
正解：C

質問 3：
Which three statements correctly describe the default BGP advertisement behavior in the Junos OS? (Choose three.)
A. Routes learned through EBGP are advertised to IBGP peers.
B. Routes learned through IBGP are advertised to other IBGP peers.
C. Routes learned through EBGP are advertised to other EBGP peers.
D. Routes learned through an IGP are automatically advertised to EBGP peers.
E. Routes learned through IBGP will be advertised to EBGP peers.
正解：A,C,E

質問 4：
Which statement is true about IS-IS PDUs?
A. CSNPs are exchanged only during initial adjacency establishment when a complete LSDB is being built.
B. Separate CSNP and PSNP types exist for Level 1 and Level 2 systems.
C. Both the DIS and the backup DIS broadcast CSNPs over a broadcast link.
D. PSNPs contain header information for all link-state PDUs in the IS-IS database.
正解：B

質問 5：
Which two new port roles does RSTP introduce? (Choose two.)
A. designated
B. alternate
C. forwarding
D. backup
正解：B,D

質問 6：
-- Exhibit - -- Exhibit -

You recently configured a new EBGP peering from R1 to your ISP. You are asked to determine which BGP routes are being advertised from R1 to this new EBGP neighbor.
Referring to the exhibit, which command is used to verify this information on R1?
A. show route protocol bgp
B. show route export
C. show route receive-protocol bgp 172.27.0.2
D. show route advertising-protocol bgp 172.27.0.1
正解：D

質問 7：

Your current network is using Switch-1 and Switch-2 as a Layer 3 core pair. You change the EX series switch core into a VC and configure the links between the switches to be a LAG.
Assuming that Switch-3 is operating at Layer 2 only, which two protocols would be removed from this portion of the network? (Choose two.)
A. VRRP
B. GRES
C. STP
D. BFD
正解：A,C

質問 8：
Which of the following can be used for both security and loop prevention?
A. MAC move limiting
B. dynamic ARP inspection
C. firewall filters
D. DHCP snooping
正解：A

質問 9：

As shown in the exhibit, you recently installed four EX Series switches in your network. These switches are using the default RSTP configuration. Which two statements are correct? (Choose two.)
A. Switch-4's root cost path is 40000.
B. Switch-4 selects ge-0/0/10.0 as its root port.
C. Switch-4 selects ge-0/0/9.0 as its root port.
D. Switch-4's root cost path is 4000.
正解：A,C