Juniper JN0-643 問題集

質問 1：
You are implementing MSTP in your network.
Which three values must match on all switches within the MST region? (Choose three)
A. Revision
B. VLANs
C. Configuration manifest
D. Context identifier
E. Region name
正解：A,B,E

質問 2：
-- Exhibit -

-- Exhibit --
Click the Exhibit button.
In the exhibit, customers connected to Area 3 must have access to external prefixes received from the data center connected to the router in Area 1. These configurations are currently applied to the routers in Area 1:
{master:0}[edit]
user@Area-1-ABR# show protocols ospf
no-nssa-abr;
area 0.0.0.1 {
nssa;
interface ge-1/1/1.100;
}
{master:0}[edit]
user@Area-1-External# show protocols ospf
area 0.0.0.1 {
stub no-summaries;
interface ge-1/1/1.100;
}
What must you change for these configurations to work?
A. Delete no-summary-lsa from the ABR router in Area 1.
B. Configure the ABR router in Area 1 to support a virtual link.
C. Configure the ABR in Area 1 for a default LSA with a default-metric of 10 and no- summaries.
D. Configure the external router in Area 1 for NSSA.
正解：D

質問 3：
When using PIM-SM in SSM mode, which event triggers the creation of a shortest-path tree?
A. Multicast traffic received at the receiver's designated router (DR).
B. Multicast traffic received at the rendezvous point (RP).
C. An IGMPv3 report received at the receiver's designated router (DR).
D. An IGMPv3 report received at the source's designated router (DR).
正解：C

質問 4：
Which two statements is true regarding the next hop attribute? (Choose two)
A. it is not changed when sent across EBGP sessions
B. it is not changed for IGBP routes learned from EBGP
C. it is changed to self for IBGP routes learned from EBGP
D. it is Changed by default when sent across EBGP sessions
正解：B,D

質問 5：
-- Exhibit -

-- Exhibit --
Click the Exhibit button.
You are the administrator for the network shown in the exhibit. R1 receives the
1 96.15.4.0/24 route from routers R2, R3, and R4. Local preference values have not been modified in this network. You are asked to ensure that R1 prefers the path through AS
3 149 for traffic destined to 196.15.4.0/24.
Which two methods will accomplish this task? (Choose two.)
A. Configure as-path-prepend on R2 and R4.
B. Configure local-as on R3.
C. Configure a lower local preference on R3.
D. Configure always-compare-med on R1.
正解：A,D