Juniper JN0-643 試験復習赤本認定試験の的中率が高い問題集がほしい？
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試験番号：JN0-643試験科目：「Enterprise Routing and Switching, Professional (JNCIP-ENT)」
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最近更新時間：2017-07-24
問題と解答：全290問 JN0-643 テスト対策書
NO.1 When using PIM-SM in ASM mode, which two events trigger the creation of a shortest-path
tree? (Choose two.)
A. PIM registers received by the rendezvous point (RP).
B. PIM join received at the receiver's designated router (DR).
C. Multicast traffic received at the receiver's designated router (DR).
D. PIM join received at the source designated router (DR).
Answer: A,C
JN0-643 解答例
NO.2 Which three statements are correct about source specific multicast (SSM) on the junos
OS? (Choose three)
A. IGMPv2 and IGMPv3 can be used with SSM.
B. IT HAS AN DEDICATED address block
C. SSM must use the232/8 address range
D. SSM does not require the use of an RP
E. SSM requires the use of an RP
Answer: A,B,D
JN0-643 真実 JN0-643 テキスト
NO.3 -- Exhibit -
-- Exhibit --
Click the Exhibit button.
Based on the exhibit, which statement about the Layer 2 topology is true?
A. A total of 64 MST instances for MST region A and region B can be configured.
B. A port on switch 3 or switch 4 towards the CST root (switch 6) is blocking traffic.
C. MSTI BPDUs are exchanged between MST regions and the CST root bridge.
D. IST BPDUs are exchanged only between switches 1 and 2, and between switches 6 and
7.
Answer: B
JN0-643 再テスト JN0-643 Vue
NO.4 -- Exhibit --
user@router> show class-of-service scheduler-map two
Scheduler map: two, Index: 56974
Scheduler: sch-best-effort, Forwarding class: best-effort, Index: 26057
Transmit ratE. 1 percent, Rate Limit: exact, Buffer sizE. remainder,
Buffer Limit: exact, Priority: low
Excess Priority: unspecified
Drop profiles:
Loss priority Protocol Index Name
Low any 1 <default-drop-profile>
Medium low any 1 <default-drop-profile>
Medium high any 1 <default-drop-profile>
High any 1 <default-drop-profile>
Scheduler: sch-expedited-forwarding, Forwarding class:
expedited-forwarding, Index: 10026
Transmit ratE. 1 percent, Rate Limit: none, Buffer sizE. 1 percent,
Buffer Limit: none, Priority: high
Excess Priority: unspecified
Drop profiles:
Loss priority Protocol Index Name
Low any 1 <default-drop-profile>
Medium low any 1 <default-drop-profile>
Medium high any 1 <default-drop-profile>
High any 1 <default-drop-profile>
user@router> show interfaces ge-0/0/1 extensive | find "CoS Information"
CoS information:
Direction : Output
CoS transmit queue Bandwidth Buffer
Priority Limit
% bps % usec
0 best-effort 1 10000000 r 0
low exact
1 expedited-forwarding 1 10000000 1 0
high none
Logical interface ge-0/0/1.823 (Index 74) (SNMP ifIndex 506) (Generation 139)
Flags: SNMP-Traps 0x4000 VLAN-Tag [ 0x8100.823 ] Encapsulation: ENET2
Traffic statistics:
Input bytes : 1820224529
Output bytes : 6505980
Input packets: 1436371
Output packets: 75905
(... output truncated ...)
user@router> show interfaces ge-0/0/1 extensive | find "Queue Counters"
Queue counters: Queued packets Transmitted packets Dropped packets
0 best-effort 1343970 1343970 7105
1 expedited-fo 53987 53987
0
2 assured-forw 0 0
0
3 network-cont 0 0
0
Queue number: Mapped forwarding classes
0 best-effort
1 expedited-forwarding
2 assured-forwarding
3 network-control
Active alarms : None
Active defects : None
(... output truncated ...)
-- Exhibit --
Click the Exhibit button.
Based on the configuration in the exhibit, why are you seeing drops in the best-effort queue on the
SRX Series platform?
A. The best-effort queue is being shaped.
B. The drop-profile fill level is set too low.
C. The scheduler is not being applied correctly.
D. Packets are dropped by a firewall policy.
Answer: A
JN0-643 学習
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