NEW QUESTION 1
In Cisco MPLS TE implementations, what can cause the tunnel bandwidth to adjust automatically based on the traffic load in the tunnel?

• A. fast reroute
• B. admin weight
• C. autobandwidth
• D. bandwidth subpool

Answer: C

NEW QUESTION 2
The Cisco IOS and IOS XE qos pre-classify command allows which kind of packet classification on IP packets that are encapsulated with GRE and IPsec?

• A. allows for packets to be classified based on the ToS byte values before packet encryption
• B. allows for packets to be classified based on the ToS byte values after packet encryption
• C. allows for packets to be classified based on the packet payload before packet encryption
• D. allows for packets to be classified based on the packet payload after packet encryption
• E. allows for packets to be classified based on the packet header parameters other than the ToS byte values after packet encryption

Answer: E

NEW QUESTION 3
At which layer does Cisco recommend the QoS trust boundary be set for an enterprise network environment?

• A. core layer, facing the distribution layer
• B. distribution layer, facing the access layer
• C. access layer, facing the end hosts
• D. distribution layer, facing the core layer

Answer: C

NEW QUESTION 4
On Cisco routers, which three methods can be used to map traffic into the MPLS traffic engineering tunnel? (Choose three.)

• A. on-demand routing
• B. static routing
• C. optimized edge routing
• D. policy-based routing
• E. autoroute

Answer: BDE

NEW QUESTION 5
When implementing CBWFQ, where should Weighted Random Early Detection configuration be applied?

• A. route-map
• B. policy-map
• C. class-map
• D. service-policy

Answer: B

NEW QUESTION 6
Which affinity value will be matched by the affinity bit mask of the affinity 0xFF00000A mask 0xFFFF000F command?

• A. 0xFFFF000A
• B. 0xFF00EEEA
• C. 0xFF000000
• D. 0x00000000
• E. 0x11110001

Answer: B

Explanation: 0xFF00000A 11111111000000000000000000001010
0xFFFF000F 11111111111111110000000000001111
0xFF00EEEA 11111111000000001110111011101010

NEW QUESTION 7
Scenario:




From PE8 router, what is the label action used to reach the P2 loopback 0 interface 10.0.2.1/32?

• A. Swap label 35 with label 16004
• B. Push label 16004
• C. Pop label 35
• D. Pop label 16009
• E. Push Label 16009
• F. Swap label 35 with label 16009

Answer: C

Explanation: show mpls forwarding-table , find prefix 10.0.2.1 and you will see there under outgoing Label "Pop Label" (This is actually logic because the prefix is directly connected and therefore the packet will forward without label). If the router should forward any packet to that prefix, the packet should be received with Local label on PE8 (Local Label = 35), the router will remove it and forward it without Label.

NEW QUESTION 8
Referring to the show output exhibit, which statement is correct?

• A. The P1 router is receiving label information for the 10.0.2.1/32 prefix from two LDP peers.
• B. The P1 router is receiving label information for the 10.7.1.1/32 prefix from two LDP peers.
• C. The P1 router is using the IMP-NULL local label for the 10.7.1.1/32 prefix because 10.7.1.1/32 is the loopback interface IP address on the P1 router.
• D. The P1 router will perform PHP for the 10.7.1.1/32 and 10.7.10.1./32 prefixes.

Answer: B

NEW QUESTION 9
Refer to the exhibit.

While configuring traffic shaping, you implement this configuration. Which additional configuration is required?

• A. a service policy in the outbound direction on the interface
• B. a service policy in the inbound direction on the interface
• C. a default queue
• D. a second class, to match other traffic

Answer: A

NEW QUESTION 10
When configuring LLQ (strict priority queue) on a traffic class using the Cisco IOS XR priority command on a Cisco ASR9K router, which additional QoS command is required for this traffic class?

• A. shape
• B. police
• C. random-detect
• D. bandwidth

Answer: B

Explanation: The Low Latency Queueing feature brings strict priority queueing to Class-Based Weighted Fair Queueing (CBWFQ).

NEW QUESTION 11
You are configuring MPLS LDP in a new network segment and notice that LDP sessions are discovered but no sessions are established. Which issue is preventing the establishment of the LDP neighbors?

• A. The loopback addresses of the label switch routers are unavailable
• B. MPLS labels are not allocated for local routers
• C. IP Cisco Express Forwarding is disabled on the label switch routers
• D. An access link is blocking TCP port 711 on the MPLS routers

Answer: A

NEW QUESTION 12
A network engineer must design a core network routing domain that supports Cisco MPLS TE. Which two interior gateway protocols represent viable solutions? (Choose two.)

• A. Routing Information Protocol version 2
• B. Open Shortest Path First
• C. Enhanced Interior Gateway Routing Protocol
• D. Intermediate-System to Intermediate-System
• E. Border Gateway Protocol

Answer: BD

NEW QUESTION 13
Scenario:




On CE 7 router, which statement is correct regarding the "QOS-POLICY policy map configurations?

• A. Traffic matched bythe"QOS-HTTP-1" class-map is shaped to an average is rate of 2560000 128000bps
• B. Traffic matched bythe"QOS1-HTTP-2" class-map will be queued in the low-latency- queue which has a maximum bandwidth guarantee of 64000
• C. Traffic matched by the "QOS-FTP-1" class-map can't use more than 256 Kbps under any condition
• D. The "QOS-POLICY is applied to the gi0/0 interface in the input direction

Answer: C

Explanation: # show policy-map
# show policy-map interface x/y
# show running-config policy-map

NEW QUESTION 14
DRAG DROP

Answer:

Explanation: Place the options in the following order: Traffic Policing
WRED LLQ
Traffic Shaping

NEW QUESTION 15
When configuring class-based WRED on Cisco routers, which WRED parameter is not user configurable on a Cisco IOS XR but is user configurable on a Cisco IOS and IOS XE?

• A. the ingress or egress direction where the class-based WRED policy will be applied
• B. the maximum threshold
• C. the minimum threshold
• D. the mark probability denominator

Answer: D

Explanation: Comparison of Cisco IOS QoS and Cisco IOS-XR QoS
The Cisco IOS-XR software implementation of QoS is basically the same as the QoS implementation on Cisco
IOS software, with the following exceptions:
•On Cisco IOS-XR software, the bandwidth command can be configured only in egress policies.
•The following changes have been made to the class-map command on Cisco IOS-XR software:
–Supports 4K per logical router.
–Maximum number of match criteria configurable in one class map is eight.
•When a class is marked as high priority using the priority command on Cisco IOS-XR software, we recommend that you configure a policer to limit the priority traffic. Limiting the priority traffic will ensure that the priority traffic does not starve all of the other traffic on the line card. Use the police command to explicitly configure the policer.
•On Cisco IO-XR software, only one conform-action, exceed-action, or violate-action command can be configured at a time. To configure traffic policing, use the police command.
•On Cisco IOS-XR software, policy modifications cannot be made on existing policies. Use the policy-map command to remove the policy from all attached interfaces, delete the policy map, and redefine a new policy.
•When configuring a policy map on Cisco IOS-XR software, the maximum number of classes configurable in one policy map is 16, which includes both Level 1 and Level 2 classes. To configure a policy map, use the policy-map command.
•When WRED is configured on Cisco IOS-XR software, the mark probability in the random- detect command is not configurable—it is always set to 1.
•When the random-detect exp command is used on Cisco IOS-XR software, the exponential weighting constant is not configurable and will be programmed automatically by Cisco IOS-XR software.
•When access control lists (ACLs) are used in QoS class maps, the underlying deny or permit actions associated with access control entries (ACEs) are ignored. ACEs are used as a classification mechanism in order to provide appropriate QoS behavior as specified in class maps. Use ACLs that include ACEs with permit actions only.

NEW QUESTION 16
Which option describes the function of an IPv6 flow label?

• A. serves as a management flow to easily monitor any TCP/IP session running over IPv6
• B. serves as a 20-bit checksum per flow for authentication services built into IPv6
• C. enables efficient IPv6 flow classification based only on IPv6 main header fields
• D. used by MPLS when the service provider core network is fully IPv6 enabled

Answer: C