Alcatel-Lucent Quality of Service Questions + Answers

Post by **answerhappygod** » Tue Mar 29, 2022 7:58 am

Question 1
The IP ToS field consists of ________ bits, of which ________are used. The
_________most significant (first) bits define precedence.
A. 8, 6, 3
B. 8, 8, 6
C. 16, 8, 4
D. 8, 6, 4
E. 24, 16, 8

Answer : A

Question 2
Which of the following are examples of metrics for QoS?
A. Signal degradation, attenuation, line loss
B. Latency, FIFO, WRED
C. Delay, jitter, packet loss
D. SNR, queue depth, latency
E. Attenuation, dispersion, latency

Answer : C

Question 3
What is the 6-bit binary representation of DSCP value AF21?
A. 010011
B. 100010
C. 010001
D. 001100
E. 010010

Answer : E

Question 4
Which of the following statements regarding DSCP bits are TRUE? (Choose three)
A. The three most significant (first) bits define 8 forwarding classes.
B. The three least significant (last) bits of the DSCP specify the drop probability.
C. The full 8 bits of the TOS field are used for DSCP.
D. To convert DSCP to IP precedence, the three most significant (first) bits are matched.
E. DSCP provides for eight drop probabilities.

Answer : A,B,D

Question 5
Which of the following can be used as classifiers of customer traffic? (Choose three)
A. DSCP value
B. 802.1p value
C. IP DF bit
D. TCP/UDP port numbers
E. HTML version number

Answer : A,B,D

Question 6
Which of the following are characteristics of DSCP? (Choose two)
A. DSCP is part of the Layer 3 header.
B. DSCP is a 6-bit field.
C. DSCP specifies eight different priorities.
D. DSCP specifies four precedence levels.
E. DSCP is part of the Layer 2 header
F. DSCP specifies 128 different per-hop behaviors.

Answer : A,B

Question 7
What is an SLA? (Choose two)
A. An SLA is used to provide automated, real-time testing and alarming for throughput, latency, and jitter across a provider's network.
B. An SLA is an agreement between a customer and a provider that dictates the treatment of customer traffic across the provider's network.
C. An SLA allows customers to control all traffic within the service provider's network by prioritizing their traffic over others as desired.
D. An SLA allows a customer to pre-mark traffic and ensure that traffic is treated as per the agreement within the provider's network.
E. An SLA is a standard set of network QoS policies that a provider shares to all its customers, allowing them to better understand the treatment of traffic within the provider's network.

Answer : B,D

Question 8
How many bits does DSCP use to provide QoS marking options?
A. 8
B. 16
C. 6
D. 4
E. 3

Answer : C

Question 9
Which of the following are major components of QoS functionality on the Alcatel-Lucent
7750 SR? (Choose three)
A. Microflow reservations using RSVP
B. DSCP to EXP translation
C. Traffic classification
D. Automatic profiling and policy configuration
E. Buffer memory management
F. Traffic scheduling

Answer : C,E,F

Question 10
Which of the following are characteristics of 802.1p? (Choose two)
A. 802.1p adds 16 bits to the Layer 2 header,
B. 802.1p adds 16 bits to the Layer 3 header.
C. 802.1p specifies 64 different priority levels.
D. 802.1p uses a field in the 802.1Q header.
E. 802.1p uses a field in the Layer 3 IP header
F. 802.1p defines a 3-bit Class of Service field.

Answer : D,F

Question 11
Which of the following BEST describes a SAP when regarding QoS?
A. A point in the network where EXP bits can be mapped to one of eight predefined FCs, each one with its own queue.
B. A logical point in a service tunnel where all of customer traffic is aggregated.
C. A point at which the initial classification of customer traffic occurs.
D. A point in the network where QoS parameters are discarded in favor of lower-level hardware queuing functions, such as LLI (Link Layer Interleave).
E. A point in the network where traffic flows from multiple different services are queued together, based on forwarding class.

Answer : C

Question 12
Individual application streams are considered microflows, whereas __________ are considered macroflows.
A. SAPs
B. SDPs
C. Services
D. Queues
E. Schedulers
F. Forwarding classes

Answer : F

Question 13
What is the maximum number of SAP-ingress policies that can be applied on a SAP?
A. 1
B. 2
C. 3
D. 4
E. 5
F. 8

Answer : A

Question 14
Click the exhibit button below.
Based on the configuration shown below, name the forwarding class to be associated with a TCP packet encapsulated inside an Ethernet frame that arrives on SAP 1/1/5 with the following characteristics:
Destination IP address = 120.110.1.1

TCP port number = 23 -

DSCP value = nc1 -

Dot1pvalue = 3 -
A. H2
B. NC
C. L2
D. EF
E. H1
F. BE

Answer : C

Question 15
Which of the following are possible criteria for classifying packets at the network port ingress on the Alcatel-Lucent 7750 SR? (Choose three)
A. The EXP bits in the MPLS header.
B. The packet's source and destination IP addresses.
C. The packet's DSCP bits.
D. The dot1p bits in the frame header.
E. The ID of an SDP that is transporting the packet.

Answer : A,C,D

Question 16
A default network policy is applied to all router interfaces associated with network ports.
A. TRUE
B. FALSE

Answer : A

Question 17
Which of the following are NOT ingress matching criteria for a network policy? (Choose two)
A. TCP port numbers
B. LSP EXP
C. DSCP
D. Source and destination IP addresses
E. Dot1p priority

Answer : A,D

Question 18
Click the exhibit button below. A partial SAP-ingress policy configuration is shown below. A
UDP video stream is sent to a PC with IP address 192.168.1.100. Given the SAP-ingress policy, to which forwarding class is the traffic matched?
A. AF
B. EF
C. H2
D. H1
E. BE

Answer : B

Question 19
On an Alcatel-Lucent IOM 3, how is buffer memory allocated per forwarding complex?
A. 512 MB ingress, 512 MB egress
B. 256 MB ingress, 256 MB egress
C. 1 GB dynamically allocated between ingress and egress.
D. 768 MB dynamically allocated between ingress and egress.
E. 768 MB, with a minimum of 256 MB ingress and egress, and an additional 256 MB dynamically allocated.

Answer : D

Question 20
WRED can be used to help avoid TCP slow-start synch problems.
A. TRUE
B. FALSE

Answer : A

Question 21
What is the maximum number of forwarding subclasses a forwarding class can have?
A. 3
B. 64
C. 72
D. 16
E. 56

Answer : E

Question 22
Click the exhibit button below. Given the slope-policy (below), which of the following statements are TRUE? (Choose two)
A. All out-of-profile traffic will be dropped before that of any in-profile traffic.
B. The discard probability slope of an in-profile traffic is steeper than that of an out-of- profile traffic.
C. When the shared buffer utilization reaches 55%, both in-profile and out-of-profile packets may be dropped.
D. The maximum probability with which an out-of-profile packet can be dropped is higher than that of an in-profile packet.
E. When the shared buffer utilization is at 61%, only in-profile packets are currently in the shared buffer pool.

Answer : C,D

Question 23
Click the exhibit button below. Given the SAP-ingress policy, which of the following statements are FALSE? (Choose three)
A. Queue 5 is using priority mode.
B. UDP traffic can be serviced at a maximum rate of 20 Mbps.
C. Ping traffic is place in queue 5.
D. Queues 5 and 6 will receive equal portions of any remaining available bandwidth to meet their above-CIR bandwidth requirements.
E. Queue 3 is scheduled before queue 5.

Answer : B,D,E

Question 24
Which of the following should be performed if a service provider does not want packets to make use of the shared buffer space when queued?
A. Set the CBS to 0.
B. Set the MBS equal to the CBS.
C. Set the high-priority-only equal to the MBS.
D. Set the MBS to 0.
E. Set the high-priority-only to 0.

Answer : B

Question 25
Which of the following statements BEST describes an MBS parameter?
A. It specifies the maximum rate at which a queue can be serviced.
B. It specifies the maximum depth of a queue beyond which packets will be dropped.
C. It specifies the portion of a queue that is taken from the reserved buffer pool.
D. It specifies the threshold beyond which only in-profile packets will be queued.
E. It specifies the peak bandwidth that can be attained by the incoming traffic.

Answer : B