Question 1

Which of the following statements describe the primary objectives of the policing of traffic flows on the Nokia 7750 SR? (Choose two)

Accepted Answer

The primary objectives of policing traffic flows on the Nokia 7750 SR are to ensure that traffic conforms to its profile and to provide fairness so that conforming traffic is not negatively impacted by non-conforming traffic.

Question 2

Forwarding subclasses are only relevant to, and are therefore applied within the context of, a _____________policy.

Accepted Answer

Forwarding subclasses are specifically relevant to SAP-ingress policies, which are used to manage and control traffic entering a network service access point.

Question 3

What is the maximum number of SAP-ingress policies that can be applied on a SAP?

Accepted Answer

A SAP (Service Access Point) can have a maximum of one SAP-ingress policy applied to it.

Question 4

WRED can be used to help avoid TCP slow-start synch problems.

Accepted Answer

WRED (Weighted Random Early Detection) helps manage congestion by randomly dropping packets before a queue becomes full, which can prevent TCP global synchronization issues by avoiding simultaneous packet loss across multiple connections.

Question 5

What is an SLA? (Choose two)

Accepted Answer

An SLA (Service Level Agreement) is a formal agreement between a service provider and a customer that outlines the expected level of service, including how customer traffic is treated. It allows customers to pre-mark traffic to ensure it is handled according to the agreement.

Question 6

To manage the shared buffer space at network ports, slope policies are applied on _________ for the ingress direction, and on ________ or _________ for the egress direction.

Accepted Answer

The answer of To manage the shared buffer space at...

Question 7

Click the exhibit button below. Given the output of the #show pools 1/2/2 network-egress command on a GigE port, what can the service provider deduce? (Choose two)

Accepted Answer

The answer of Click the exhibit button below. Given the...

Question 8

Which of the following are NOT ingress matching criteria for a network policy? (Choose two)

Accepted Answer

The answer of Which of the following are NOT ingress...

Question 9

How many queues are available for use on service egress within a VPLS service?

Accepted Answer

VPLS services typically use 8 queues for service egress, regardless of the traffic type, to manage different classes of service.

Question 10

A queue is configured with the following attributes: MBS = 10KB CBS = 5KB High-Priority-Only = 20% Assume that there is no CBS overbooking and that the slope-policy is disabled. If the current queue depth is 3KB, what will happen to an out-of-profile packet arriving at an egress queue?

Accepted Answer

The packet will be queued in the reserved portion of the buffer pool and remain out-of-profile because the queue is configured with High-Priority-Only = 20%, which means that 20% of the buffer space is reserved for high-priority packets. Since the packet is out-of-profile, it will be queued in the reserved portion of the buffer pool.

Question 11

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?

Accepted Answer

The answer of Click the exhibit button below. A partial...

Question 12

Which of the following statements regarding DSCP bits are TRUE? (Choose three)

Accepted Answer

The three most significant bits of DSCP define the forwarding classes, and the three least significant bits specify the drop probability. To convert DSCP to IP precedence, the three most significant bits are used.

Question 13

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

Accepted Answer

The answer of Click the exhibit button below.  Based...

Question 14

Which of the following are the minimum requirements needed to classify traffic marked with DSCP AF11, AF12, and AF13 into the AF forwarding class and provide fair treatment to the drop precedence settings? (Choose three)

Accepted Answer

The answer of Which of the following are the minimum...

Question 15

Which of the following are characteristics of 802.1p? (Choose two)

Accepted Answer

The answer of Which of the following are characteristics of...

Question 16

The IP ToS field consists of ________ bits, of which ________are used. The _________most significant (first) bits define precedence.

Accepted Answer

The IP Type of Service (ToS) field is 8 bits long, of which 6 bits are used for the Differentiated Services Code Point (DSCP) and 2 bits for Explicit Congestion Notification (ECN). The 3 most significant bits were originally used for precedence.

Question 17

Which of the following can be used as classifiers of customer traffic? (Choose three)

Accepted Answer

DSCP value, 802.1p value, and TCP/UDP port numbers can be used to classify customer traffic as they are part of network protocols that help in identifying and managing traffic.

Question 18

What is the 6-bit binary representation of DSCP value AF21?

Accepted Answer

The DSCP value AF21 corresponds to a decimal value of 18. The 6-bit binary representation of 18 is 010010.

Question 19

Click the exhibit button below. A service provider has applied the SAP-ingress policy configuration below on his customer's SAP. The service provider notices that all of the customer's traffic is being dropped at the SAP-ingress. Which of the following actions can resolve the problem, if applied on its own? (Choose three)

Accepted Answer

The answer of Click the exhibit button below. A service...

Question 20

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?

Accepted Answer

The answer of Which of the following should be performed...

Exam 1: Nokia Scalable IP Networks