Ciscoの642-642試験の最高の問題集

Ciscoの642-642認定試験は人気があるIT認証に属するもので、野心家としてのIT専門家の念願です。このような受験生は642-642認定試験で高い点数を取得して、自分の構成ファイルは市場の需要と互換性があるように充分な準備をするのは必要です。

Pass4Testが提供した研修ツールはCiscoの642-642の認定試験に向けて学習資料やシミュレーション訓練宿題で、重要なのは試験に近い練習問題と解答を提供いたします。Pass4Test を選ばれば短時間にITの知識を身につけることができて、高い点数をとられます。

Pass4TestのCiscoの642-642トレーニング資料は完璧な資料で、世界的に最高なものです。これは品質の問題だけではなく、もっと大切なのは、Pass4TestのCiscoの642-642試験資料は全てのIT認証試験に適用するもので、ITの各領域で使用できます。それはPass4Testが受験生の注目を浴びる理由です。受験生の皆様は我々を信じて、依頼しています。これもPass4Testが実力を体現する点です。我々の試験トレーニング資料はあなたが買いてから友達に勧めなければならない魅力を持っています。本当に皆様に極大なヘルプを差し上げますから。

Pass4Testは多くのIT職員の夢を達成することであるウェブサイトです。IT夢を持っていたら、速くPass4Testに来ましょう。 Pass4Testにはすごいトレーニング即ち Ciscoの642-642試験トレーニング資料があります。これはIT職員の皆が熱望しているものです。あなたが試験に合格することを助けられますから。

試験番号：642-642問題集
試験科目：Cisco 「Quality of Service (QoS)」

購入前にお試し,私たちの試験の質問と回答のいずれかの無料サンプルをダウンロード：http://www.pass4test.jp/642-642.html

NO.1 Switch port fa0/2 has been configured to connect an IP phone with an attached PC. Given the set of
commands shown below, where does the trust boundary lie?
interface fa0/2
mls qos trust cos
mls qos trust device cisco-phone
switchport voice vlan 112
A. between the IP phone and the switch
B. between the IP phone and the PC
C. between the access layer switch and the distribution layer switch
D. between the PC port and the LAN port on the IP phone
Answer: A

Cisco   642-642   642-642   642-642参考書

NO.2 In an unmanaged CE router implementation, how does the service provider enforce the SLA?
A. by using class-based policing on the CE to PE link to limit the customer's input rate
B. by marking on the CE to PE link and using CBWFQ and CB-WRED on the PE to P link
C. by marking on the CE to PE link and using class-based policing on the PE to P link
D. by using class-based random discard on the CE to PE link to limit the customer's input rate
Answer: A

Cisco認定資格   642-642過去問   642-642認証試験

NO.3 In which two locations is the qos pre-classify command applied to support QoS preclassification over an
IPSec/GRE tunnel? (Choose two.)
A. the tunnel interface
B. the physical interface
C. the crypto map
D. the policy-map
E. the class-map
Answer: AC

Cisco   642-642参考書   642-642認定資格   642-642認証試験   642-642参考書

NO.4 LAB
A. Please click console
Answer:
2950.SWITCH>en
2950-SWITCH#config terminal
2950-SWITCH(config)#int fa0/1
2950-SWITCH(config-if)#mls qos trust dscp
2950-SWITCH(config-if)#exit
2950-SWITCH(config)#int fa0/11
2950-SWITCH(config-if)#mls qos trust cos
2950-SWITCH(config-if)#exit
2950-SWITCH(config)#int fa0/10
2950-SWITCH(config-if)#mls qos trust cos
2950-SWITCH(config-if)#mls qos trust device cisco-phone
2950-SWITCH(config-if)#exit
2950-SWITCH(config)#exit
2950-SWITCH#copy run start

NO.5 The following commands have been configured under the fa0/1 interface on the 2950 switch:
wrr-queue bandwidth 20 1 80 0
mls qos trust cos
mls qos trust device cisco-phone
Voice traffic from the IP phone that is directly connected to the fa0/1 interface is experiencing excessive
delays.
What could be the cause of this problem?
A. The wrr-queue bandwidth weightings are not correct.
B. The default wrr-queue cos-map is being used.
C. The default cos-to-dscp map is being used.
D. The default dscp-to-cos map is being used.
E. The trust boundary configuration is not correct.
Answer: B

Cisco   642-642認定試験   642-642   642-642   642-642

NO.6 In a managed CE scenario, the customer's network is supporting VoIP and bulk file transfers.
According to the best practices, which QoS mechanisms should be applied on the WAN edge CE-PE
56-kbps Frame Relay link on the CE outbound direction?
A. WRR, FRTS, FRF.12, and CB-RTP header compression
B. WRR, CB-WRED, CB-Marking, FRF.12, and CB-RTP header compression
C. CBWFQ, CB-WRED, CB-Marking, CB-Policing, and FRTS
D. CBWFQ, FRTS, FRF.12, and CB-RTP header compression
E. LLQ, CB-WRED, CB-Marking, FRTS, FRF.12, and CB-RTP header compression
F. LLQ, CB-WRED, CB-Policing, and CB-TCP and CB-RTP header compressions
Answer: E

Cisco   642-642   642-642

NO.7 Which two commands are typically applied to the voice traffic class within a policy-map? (Choose two.)
A. shape peak {bps}
B. priority {kbps}
C. bandwidth {kbps}
D. compress header ip rtp
E. random-detect ecn
F. random-detect dscp-based
Answer: BD

Cisco練習問題   642-642認証試験   642-642過去問   642-642

NO.8 What is the purpose of the qos pre-classify command?
A. to enable the IOS to copy the ToS field from the original IP header to the outer tunnel IP header
B. to enable the IOS to copy the ToS field from the outer tunnel IP header back into the original IP header
C. to enable the IOS to classify the packet based on the original IP header instead of the tunnel IP header
D. to enable the IOS to classify the packet based on the outer tunnel IP header instead of the original IP
header
E. to enable class-based marking on tunnel interface
F. to enable class-based marking on IPSec crypto maps
Answer: C

Cisco認定資格   642-642   642-642過去問

NO.9 Based on the following 2950 switch configurations, which statement is correct?
no wrr-queue cos-map
wrr-queue bandwidth 20 10 70 1
wrr-queue cos-map 4 5
wrr-queue cos-map 1 0 1 2 3
wrr-queue cos-map 3 6 7
A. Queue 1 is setup as the expedite queue.
B. Queue 2 is setup as the expedite queue.
C. Queue 3 is setup as the expedite queue.
D. Queue 4 is setup as the expedite queue.
E. No queue is setup as the expedite queue.
Answer: E

Cisco   642-642参考書   642-642認定証

NO.10 Answer:

NO.11 Answer:

NO.12 What is the purpose of using multiactions traffic policing?
A. so that exceed traffic can be shaped and violate traffic can be policed
B. so that conform, exceed, and violate traffic can be marked with different CLPs
C. so that conform traffic from different flows can be marked with different DSCPs
D. so that class-based policing can mark at Layer 2 and Layer 3 at the same time
E. so that traffic can be policed using two separate rates
Answer: D

Cisco   642-642   642-642過去問   642-642   642-642参考書   642-642

NO.13 Refer to the exhibit.
Which three statements are true about the configuration.? (Choose three.)
class-map class-1
match ip rtp 2024 1000
class-map class 2
match dscp 5 6 7
policy-map access-group-1-traffic
class class-1
shape peak 16000
class class-2
police 8000 1000
conform-action set-dscp-transmit 1
exceed-action set-dscp-transmit 0
violate-action drop
class class-default
fair-queue 16
queue-limit 20
interface fastethernet 0/0
service-policy output access-group1-traffic
A. Traffic that is subject to shaping can burst up to 32,000 bps.
B. IP traffic (DSCPs 5, 6, and 7) that is sent on fastethernet 0/0 will be traffic policed.
C. RTP traffic (ports 2024 and 1000) that is sent on fastethernet 0/0 will be traffic shaped.
D. Traffic that is subject to policing will have the DCSP set to 0 if the rate exceeds 1000 bps.
E. IP traffic (DSCPs 1, 2, 3, and 4) that is sent on fastethernet 0/0 are considered to have a violate status
and are dropped.
F. IP traffic (DSCP 0) that is sent on fastethernet 0/0 will be subject to fair queuing.
Answer: ABF

Cisco   642-642   642-642認定資格   642-642認定試験   642-642認証試験

NO.14 What does the following command accomplish?
router(config-pmap-c)# shape fecn-adapt
A. enables the router to lower the shaping rate when BECN bits are received
B. enables the router to lower the shaping rate when FECN bits are received
C. enables the router to respond to FECN bits by creating test frames in the opposite direction with the
BECN bit set
D. enables the router to respond to BECN bits by creating test frames in the opposite direction with the
FECN bit set
E. enables the router to increase the shaping rate when BECN bits are received
F. enables the router to increase the shaping rate when FECN bits are received
Answer: C

Cisco認定証   642-642   642-642過去問   642-642認定試験   642-642

NO.15 Which QoS mechanism calculates the mean queue depth to determine its operation?
A. WRED
B. LLQ/CBWFQ
C. WFQ
D. class-based shaping
E. class-based policing
Answer: A

Cisco参考書   642-642   642-642   642-642   642-642

われわれは今の競争の激しいIT社会ではくつかIT関連認定証明書が必要だとよくわかります。IT専門知識をテストしているCiscoの642-642認定試験は1つのとても重要な認証試験でございます。しかしこの試験は難しさがあって、合格率がずっと低いです。でもPass4Testの最新問題集がこの問題を解決できますよ。642-642認定試験の真実問題と模擬練習問題があって、十分に試験に合格させることができます。