PDF Version DemoAlong with the coming of the information age, the excellent IT skills are the primary criterion for selecting talent of enterprises. Cisco Certification gives an IT a credential that is recognized in the IT industry. It can act as a passport to a well-rewarded job, smooth the path to promotion or higher earnings. Here, Cisco certification 642-642 exam (Quality of Service (QoS)) is a very important exam to help you get better progress and to test your IT skills.
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Cisco Quality of Service (QoS) Sample Questions:
1. Where is the fragment size configured when using FRF.12 link fragmentation and interleaving?
A) within the Frame Relay map-class
B) within the MQC policy-map
C) within the MQC class-map
D) within the MQC service-policy
E) within the logical multilink interface
F) within the physical serial interface
2. Which command is needed to correct the following configurations in order to enable ppp multilink
LFI on the s0/0 interface?
interface Serial0/0
ip address 10.1.1.1 255.255.255.0
encapsulation ppp
no fair-queue
ppp multilink
multilink-group 2001100114
!
interface Multilink2001100114
bandwidth 384
ip address 10.1.1.1 255.255.255.0
service-policy output AutoQoS-Policy-UnTrust
ppp multilink
ppp multilink fragment-delay 10
ppp multilink interleave
A) the ppp multilink load-threshold command on the Multilink2001100114 interface
B) the ppp multilink interleave command on the s0/0 interface
C) the multilink-group 2001100114 command on the Multilink2001100114 interface
D) the ppp multilink load-threshold command on the s0/0 interface
E) the no ip address command on the s0/0 interface
3. Based on the following show output, which statement is true?
WG1S1#sh mls qos interface fa0/1 FastEthernet0/1 trust state: not trusted trust mode: trust cos COS override: dis default COS: 0 pass-through: none trust device: cisco-phone
A) All incoming DSCP markings are trusted.
B) DSCP markings from the Cisco IP Phone are trusted.
C) A Cisco IP Phone is not connected to the fa0/1 switch port.
D) All incoming CoS markings are trusted.
4. Which QoS mechanism adds IP Precedence information for prefixes into the FIB table?
A) Class-Based Marking
B) QoS pre-classify
C) Class-Based WRED
D) AutoQoS
E) LLQ
F) QPPB
5. Refer to the exhibit. A typical configuration involving an IP phone with an attached PC is shown. According to QoS recommendations, at which demarcation line (shown as dotted lines) would the trust boundary normally exist?
A) C
B) A
C) B
D) D
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: E | Question # 3 Answer: C | Question # 4 Answer: F | Question # 5 Answer: C |
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