ビャクシンのJN0-643 練習問題の認定試験の最新学習資料
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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：2017-08-15
問題と解答：全290問 JN0-643 関連資格知識
NO.1 -- 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. Packets are dropped by a firewall policy.
D. The scheduler is not being applied correctly.
Answer: A
JN0-643 デモ
NO.2 Which statement is true regarding the SPF algorithm?
A. If you apply an import policy to OSPF, it keeps LSAs from being flooded, and the SPF calculation can
be affected.
B. There are two databases used in the calculation, the link-state database and the tree database.
C. The SPF calculation is run on a per-area basis on each router.
D. The SPF algorithm is run on a per-domain basis.
Answer: C
JN0-643 費用 JN0-643 教本
NO.3 You must troubleshoot a CoS issue on an Ethernet interface which has been observed to drop
packets in the best effort queue. You must determine whether the dropped packets are tail drops.
Which CLI command output accomplishes this task?
A. show class-of-service interface
B. show interfaces queue <interface_name>
C. show class-of-service forwarding-class best-effort
D. show interfaces <interface_name> extensive
Answer: B
JN0-643 範囲 JN0-643 予約
NO.4 Which three statements are correct about source specific multicast (SSM) on the junos
OS? (Choose three)
A. SSM must use the232/8 address range
B. SSM requires the use of an RP
C. IT HAS AN DEDICATED address block
D. IGMPv2 and IGMPv3 can be used with SSM.
E. SSM does not require the use of an RP
Answer: C,D,E
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