Juniper JN0-343 問題集

質問 1：
Router-1 and Router-2 need to connect through the Internet using a tunneling technology. Hosts that are connected to Router-1 and Router-2 will be sending traffic up to 1500 bytes. The maximum segment size that is supported across the path is 1520 bytes.
Which tunneling technology will allow this communication to take place?
A. IP-IP tunnel
B. GRE tunnel
C. IPsec VPN tunnel mode
D. IPsec VPN transport mode
正解：A

質問 2：
What is one benefit of the root protection feature?
A. It disables the port when it detects that a loop has formed over an edge port.
B. It guards against loops caused by a changed root bridge I
C. It guards against loops caused by unidirectional link failures.
D. It ensures downstream switches never become the root bridge.
正解：D

質問 3：
Which three types of firewall filters are supported by Juniper Networks EX Series Ethernet switches? (Choose three.)
A. a VLAN-based firewall filter applied to Layer 3 in the ingress and egress directions
B. a VLAN-based firewall applied to Layer 2 VLANs in the ingress and egress directions
C. a router-based firewall filter applied to Layer 3 routed interfaces in the ingress and egress directions
D. a router-based firewall filter applied to Layer 2 routed interfaces in the ingress and egress directions
E. a port-based firewall applied to Layer 2 switch ports in the ingress and egress direction
正解：B,C,E

質問 4：
Which two statements are true regarding the election process of the DIS in IS-IS? (Choose two.)
A. The default DIS election priority is 64 for Level 1 and Level 2.
B. A user can configure a priority for DIS election from 0 to 255.
C. In the event of a priority tie, the DIS is the router with the lowest configured IP address.
D. In the event of a priority tie, the DIS is the router with the highest MAC address.
正解：A,D

質問 5：
-- Exhibit -

-- Exhibit -
In the exhibit, the switches have all been powered on at the same time and have the factory default RSTP configuration.
Which action would ensure that Switch A becomes the root bridge?
A. On Switch A, issue the set protocols rstp bridge-priority 28k command.
B. On Switch C, issue the set protocols rstp bridge-priority 36k command.
C. On Switch A, issue the set protocols rstp bridge-priority 36k command.
D. On Switch B, issue the set protocols rstp bridge-priority 28k command.
正解：A

質問 6：
Which three statements are correct about the processing order of firewall filters on a Junos device? (Choose three.)
A. A router-based firewall filter applied to an RVI applies to switched packets in the same VLAN.
B. The ingress processing order is port, VLAN, router.
C. A router-based firewall filter applied to an RVI does not apply to switched packets in the same VLAN.
D. A port-based firewall filter applied to an RVI does not apply to switched packets in the same VLAN.
E. The egress processing order is router, VLAN, port.
正解：B,C,E

質問 7：
-- Exhibit - -- Exhibit -

R2 is receiving an EBGP route from R1. R3 is correctly receiving the route, but R4 is not.
How would you resolve this problem?
A. Change the R2, R3, and R4 peering session types to external.
B. Configure a static route between R2 and R4.
C. Configure an IBGP session between R2 and R4.
D. Add a route reflector to AS 65501.
正解：C

質問 8：
Which two statements describe nonstop routing? (Choose two.)
A. RPD is running on the backup RE.
B. COSD is running on the backup RE.
C. Peer nodes are not alerted of RE mastership changes.
D. Graceful restart is required for nonstop routing to function.
正解：A,C