QOS

Question 1

4- And 5- Class Model

Answer 1

Real Time
Call Signalling
Critical Data
Best Effort
Scavenger

Question 2

8-Class Model

Answer 2

Voice
Video
Call Signaling
Network Control
Critical Data
Bulk Data
Best Effort
Scavenger

Question 3

QoS 11-Calss Model

Answer 3

Voice
Interactive Video
Streaming Video
Call Signaling
IP Routing
Network Management
Mission-Critical Data
Transactional Data
Best Effort
Scavenger

Question 4

VoIP Telephony

Answer 4

PHB DSCP Layer2 CoS/MPLS EXP
EF 46

Question 5

Real-time Interactive

Answer 5

PHB DSCP Layer2 CoS/MPLS EXP
CS4 32 5

Question 6

Multimedia Conferencing

Answer 6

PHB DSCP Layer2 CoS/MPLS EXP
AF41 34 4

Question 7

Broadcast Video

Answer 7

PHB DSCP Layer2 CoS/MPLS EXP
CS5 40 5

Question 8

Multimedia Streaming

Answer 8

PHB DSCP Layer2 CoS/MPLS EXP
AF31 26 3

Question 9

Call Signaling

Answer 9

PHB DSCP Layer2 CoS/MPLS EXP
CS3 24 3

Question 10

Network Control

Answer 10

Layer 3 Classification DSCP Layer2 CoS/MPLS EXP
CS6 48 6

Question 11

Network Management

Answer 11

Layer 3 Classification DSCP Layer2 CoS/MPLS EXP
CS2 16 2

Question 12

Transactional Data

Answer 12

Layer 3 Classification DSCP Layer2 CoS/MPLS EXP
AF21 18 2

Question 13

Bulk Data

Answer 13

Layer 3 Classification DSCP Layer2 CoS/MPLS EXP
AF11 10 1

Question 14

Scavenger

Answer 14

Layer 3 Classification DSCP Layer2 CoS/MPLS EXP
CS1 8 1

Question 15

Best Effort

Answer 15

Layer 3 Classification DSCP Layer2 CoS/MPLS EXP
0 0 0

Question 16

(DSCP Encoding)
Used for best-Effort Service

Answer 16

DEFAULT

Bits 5 to 7
Of
DSCP = 000

Question 17

(DSCP Encoding)
Used for low-delay service

Answer 17

EF - Expedited Forwarding
Bits 5 to 7
Of
DSCP = 101

Question 18

(DSCP Encoding)
Used for guaranteed bandwidth service

Answer 18

AF - Assured Forwarding
Bits 5 to 7
Of
DSCP = 001, 010, or 100

Question 19

(DSCP Encoding)
Used for backward compatibility with non-DiffServ- compliant devices (RFC 1813 devices)

Answer 19

Class selector

Bits 2 to 4
Of
DSCP =000