Juniper JN0-343 問題集

質問 1：
A router is configured to use standard metrics. The router has a single link to a Level 2 ISIS neighbor.
What is the maximum metric for that link?
A. 65534
B. 254
C. 63
D. 1023
正解：C

質問 2：
Which command can you use to view the link-state PDUs?
A. show isis adjacency
B. show isis database detail
C. show isis spf results
D. show isis route detail
正解：B

質問 3：
-- Exhibit -user@R1> show route 66.129.0.0/22 exact detail inet.0: 12 destinations, 12 routes (11 active, 0 holddown, 1 hidden) 66.129.0.0/22 (1 entry, 1 announced) *Aggregate PreferencE. 130 Next hop typE. Reject Next-hop reference count: 2 StatE. <Active Int Ext> AgE. 1:39:21 Task: Aggregate Announcement bits (1): 0-KRT AS path: I (LocalAgg) Flags: Depth: 0 Active AS path list: AS path: I Refcount: 3 Contributing Routes (3): 66.129.0.0/24 proto Direct 66.129.1.0/24 proto Direct 66.129.2.0/24 proto Direct
-- Exhibit -
In the exhibit, R1 receives a packet with a destination address of 66.129.3.1.
Which action does R1 take on the packet?
A. R1 forwards the packet to the next hop associated with the contributor with the lowest RID.
B. R1 rejects the packet and sends an unreachable message back to the source.
C. R1 silently discards the packet.
D. R1 forwards the packet to the next hop associated with the primary contributing route.
正解：B

質問 4：
Which configuration allows the virtual IP address to respond to pings?
A. [edit interfaces fe-0/0/0 unit 50 family inet address 192.168.0.12/24]
user@RouterA# show
vrrp-group 50 {
virtual-address 192.168.0.1;
fast-interval 250;
accept-icmp;
}
B. [edit interfaces fe-0/0/0 unit 50 family inet address 192.168.0.12/24]
user@RouterA# show
vrrp-group 50 {
virtual-address 192.168.0.1;
fast-interval 250;
preempt;
accept-data;
}
C. [edit interfaces fe-0/0/0 unit 50 family inet address 192.168.0.12/24]
user@RouterA# show
vrrp-group 50 {
virtual-address 192.168.0.1;
priority 220;
advertise-interval 10;
preempt;
accept-packets;
}
D. [edit interfaces fe-0/0/0 unit 50 family inet address 192.168.0.12/24]
user@RouterA# show
vrrp-group 50 {
virtual-address 192.168.0.1;
fast-interval 250;
no-preempt;
no-accept-data;
}
正解：B

質問 5：

A network administrator has connected four switches as shown in the exhibit. The switches are at their factory-default configurations and the administrator powers on all of the switches at the same time.
Which switch will become the root bridge?
A. Switch C
B. Switch B
C. Switch A
D. Switch D
正解：A

質問 6：
Which two statements are true regarding the default VLAN in EX Series switches?
(Choose two.)
A. All switch ports not specifically assigned to a user-defined VLAN belong to the default VLAN.
B. An administrator can change the VLAN ID of the default VLAN.
C. The show interface-command shows an asterisk (*) after the interface name if the interface is part of default VLAN.
D. An interface that is part of the default VLAN cannot carry tagged traffic.
正解：A,B

質問 7：
Which two common scenarios will prevent an IS-IS adjacency from forming? (Choose two.)
A. There are mismatched Level 2 areas.
B. An IP address is not configured on the lo0 interface.
C. There are mismatched Level 1 areas.
D. The interface MTU value is set lower than 1492.
正解：C,D

質問 8：
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. local preference
B. metric to next hop
C. MED
D. neighbor ID
正解：C