NEW QUESTION 1
Referring to the Cisco IOS XR show command output exhibit,

what are three possible reasons that the GigabitEthernet0/1/0/10 LDP IGP sync status is not ready? (Choose three.)

• A. GigabitEthernet0/1/0/10 is not configured to run LDP.
• B. Graceful restart is not configured on the peer.
• C. The LDP neighbor on GigabitEthernet0/1/0/10 is not up.
• D. The OSPF neighbor on GigabitEthernet0/1/0/10 is not up.
• E. LDP is up on GigabitEthernet0/1/0/10, but no label bindings have been received from the peer.
• F. GigabitEthernet0/1/0/10 is a member link of Bundle-Ether9000.

Answer: CDE

NEW QUESTION 2
Which option describes what happens when a labelled packet with a TTL of 1 is received by an LSR?

• A. The packet is forwarded on to the next router where its TTL expires and from where an ICMP "time exceeded" message is generated and routed back to the source.
• B. The packet is dropped and an ICMP "time exceeded" message is IP routed back to the sender.
• C. The packet is dropped and an ICMP "time exceeded" message is label-switched from the expiring router back on a new path toward the source.
• D. The packet is dropped and an ICMP "time exceeded" message is label-switched from the expiring router on the same label switched path toward the destination and then back to the originating source.
• E. The packet is forwarded on to the next router where its TTL expires and from where an ICMP "time exceeded" message is generated and label switched back to the source.

Answer: D

NEW QUESTION 3
Refer to the exhibit.

You are about to implement security features, including this configuration, within the MPLS
network of a large MPLS service provider. How does the router distribute the labels to its neighbors?

• A. All network 10.100.0.0/24 labels are sent to all TDP neighbors
• B. All network 10.100.0.0/16 labels are sent to all LDP neighbors
• C. All network 10.100.0.0/24 labels are sent to all LDP neighbors
• D. All network 10.100.0.0/24 labels are sent to all LDP and TDP neighbors

Answer: C

NEW QUESTION 4
Which two options are able to perform the MPLS label distribution function? (Choose two.)

• A. manual tagging
• B. static
• C. LDP
• D. RSVP-TE
• E. CEF

Answer: CD

NEW QUESTION 5
On the Cisco ASR9K router, when using the bandwidth command to specify the minimum guaranteed bandwidth to be allocated for a specific class of traffic, what will be used as the queuing algorithm?

• A. custom queuing
• B. CBWFQ
• C. WFQ
• D. FIFO
• E. priority queuing

Answer: B

Explanation: Class based weighted fair queuing (CB-WFQ) was initially released without the support of a priority queuing system, thus it could not guarantee the delay and jitter (delay variation) requirements of real-time, interactive voice and video conversations. Since for CBWFQ, the weight for a packet belonging to a specific class is derived from the bandwidth assigned to the class, which in turn determines the order in which packets are sent.
All packets are serviced fairly based on weight and no class of packets may be granted strict priority. This scheme poses problems for voice traffic that is largely intolerant of delay, especially variation in delay

NEW QUESTION 6
An engineer is allocating a determined amount of bandwidth to a customer Cisco MPLS TE tunnel to guarantee its availability on a 24/7 SLA type. Which option must be configured to make sure the customer is able to use the bandwidth agreed on the SLA?

• A. RSVP that guarantees bandwidth availability end-to-end
• B. Cisco MPLS TE tunnel to signal the bandwidth required
• C. a QoS policy to reinforce the RSVP bandwidth reservation
• D. overprovisioning to guarantee bandwidth

Answer: C

NEW QUESTION 7
Which two factors must you consider when configuring MPLS EXP? (Choose two.)

• A. MPLS EXP marking is supported in the egress direction
• B. A packet that IP ToS classifies at ingress can be reclassified by MPLS EXP at egress
• C. MPLS EXP marking is supported in the ingress direction
• D. MPLS EXP classification for bridged MPLS packets on EVCs is supported
• E. A packet that MPLS classifies at ingress can be reclassified by IP ToS at egress

Answer: CE

NEW QUESTION 8
Which option describes the IPv6 flow label field?

• A. a 3-bit field used for marking a traffic flow
• B. an 8-bit field used for labeling a traffic flow
• C. a 20-bit field used to tag a traffic flow throughout the network
• D. an 8-bit field out of which the first 6 are used to classify packets

Answer: C

NEW QUESTION 9
Which QoS mechanism is used for congestion avoidance?

• A. LLQ
• B. CBWFQ
• C. WRED
• D. LFI
• E. traffic policing

Answer: C

NEW QUESTION 10
An engineer wants to extend the trust boundary to a Cisco IP Phone. Which protocol should be used?

• A. CDP
• B. CoS
• C. ToS
• D. 802.1Q

Answer: A

NEW QUESTION 11
When using the tunnel mpls traffic-eng path-option 1 explicit name test command in Cisco MPLS TE tunnel configurations, the test explicit-path configuration will consist of a list of which values?

• A. tunnel endpoint
• B. resource class affinity
• C. MPLS label
• D. IP address

Answer: D

Explanation: tunnel mpls traffic-eng path-option
To configure a path option for a Multiprotocol Label Switching (MPLS) traffic engineering tunnel, use the tunnel
mpls traffic-eng path-option command in interface configuration mode. To disable the specified path option, use the no form of this command.
tunnel mpls traffic-eng path-option number {dynamic | explicit {name path-name |
path-number}} [lockdown]
no tunnel mpls traffic-eng path-option number {dynamic | explicit {name path-name
| path-number}} [lockdown]
Syntax Description
number = When multiple path options are configured, lower numbered options are preferred.
dynamic = Path of the LSP is dynamically calculated. explicit = Path of the LSP is an IP explicit path.
name path-name = Path name of the IP explicit path that the tunnel uses with this option. path-number = Path number of the IP explicit path that the tunnel uses with this option. lockdown = (Optional) The LSP cannot be reoptimized.
Usage Guidelines
You can configure multiple path options for a single tunnel. For example, there can be several explicit path options and a dynamic option for one tunnel. Path setup preference is for lower (not higher) numbers, so option 1 is preferred.
Examples
The following example shows how to configure the tunnel to use a named IP explicit path: Router(config-if)# tunnel mpls traffic-eng path-option 1 explicit name test

NEW QUESTION 12
An engineer is having a problem getting an operational 10 Gigabit link on a Cisco ASR 9000 series router. The service provider instructs the engineer to use an LR optic. The engineer must access the router remotely.
Which command should the engineer issue to determine that the correct optic has been installed?

• A. show controllers
• B. show module optics
• C. show ip interface
• D. show optics

Answer: A

NEW QUESTION 13
Which three network services can be implemented using MPLS within the service provider IP NGN core? (Choose three.)

• A. Layer 2 VPNs
• B. Layer 3 VPNs
• C. traffic engineering
• D. IntServ traffic engineering tunnels
• E. encrypted LSPs

Answer: ABC

NEW QUESTION 14
A recent analysis of a service provider network infrastructure revealed the necessity to reinforce bandwidth control over all the 5 Mbps residential customer contracts. Which option is a viable solution to rate limit customer’s bandwidth both upstream and downstream?

• A. class-based policing
• B. committed access rate on a per interface basis
• C. reserving 5 Mbps on Cisco MPLS TE tunnels that connect customers
• D. setting customer Ethernet links to 10 Mbps half-duplex

Answer: C

NEW QUESTION 15
DS-TE implementations on Cisco routers support which bandwidth pool(s) and class type(s)? (Choose two.)

• A. global pool only
• B. subpool only
• C. global pool and subpool
• D. class-type 0 only
• E. class-type 1 only
• F. class-type 0 and class-type 1

Answer: CF

Explanation: Differential Service Tunnels
Differential Service Traffic Engineering (TE) is an extension of the regular MPLS Traffic Engineering (MPLSTE) feature. Regular TE does not provide bandwidth guarantees to different traffic classes. A single bandwidth pool (global pool) is used in regular TE that is shared by all traffic. In order to support various class of service (CoS), the ability to provide multiple bandwidth pools is required. These bandwidth pools then can be treated differently based on the requirement for the traffic class using that pool.
In RSVP global and subpools reservable bandwidths are configured on a per interface basis to accommodate TE tunnels on the node. Available bandwidth from all configured bandwidth pools is advertised using Interior Gateway Protocol (IGP). RSVP is used to signal the TE tunnel with appropriate bandwidth pool requirements.

NEW QUESTION 16
Which statement defines how MPLS LDT Graceful Restart works after a service interruption?

• A. It works independent of neighboring routers to recover MPLS forwarding information
• B. It works by helping all neighboring MPLS LDP routers to recover MPLS forwarding information
• C. It works by helping neighboring routers with MPLS LDP SSO/NSF and Graceful Restart to recover MPLS forwarding information
• D. It works independent of neighboring non-LDP Graceful Restart routers to recover MPLS forwardinginformation

Answer: C