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Test 4
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Questions in this quiz (69)
1Reveals if Cisco Express Forwarding is enabled by default on your platform. (XR)
- Ashow cef ipv4
- Bshow ip cef
- Cshow cef
- Dshow cef location <>
2Reveals if Cisco Express Forwarding is enabled by default on your platform. (XE)
- Ashow ip cef
- Bshow cef ipv4
- Cshow ip cef ipv4
- Dshow ip cef summary
3To display the status of the LDP graceful restart. (XR)
- Ashow mpls ldp graceful-restart
- Bshow ip mpls ldp graceful-restart
- Cshow mpls ldp parameters
- Dshow mpls ldp discovery
- Eshow mpls interfaces
4Check to see if the router is configured for graceful restart. (XE)
- Ashow mpls ldp neighbor brief
- Bshow ip mpls ldp neighbor brief
- Cshow mpls ldp graceful-restart
- Dshow ip mpls ldp graceful-restart
- Eshow mpls interfaces
- Fshow mpls ldp discovery
5Verify content of the LIB table (XE)
- Ashow mpls ldp bindings
- Bshow ip mpls ldp bindings
- Cshow mpls forwarding
- Dshow mpls ldp neighbor brief
6Displays LDP parameters on the local router (XR)
- Ashow mpls ldp parameters
- Bshow ip mpls ldp parameters
- Cshow mpls ldp neighbor brief
- Dshow mpls ldp neighbor
- Eshow mpls ldp discovery
7Displays MPLS status on individual interfaces (XE)
- Ashow mpls interfaces
- Bshow ip mpls interfaces
- Cshow mpls ldp discovery
- Dshow mpls ldp neighbor brief
- Eshow rsvp interface
8Displays all discovered LDP neighbors (XR)
- Ashow mpls ldp discovery
- Bshow mpls ldp neighbor brief
- Cshow ip mpls ldp discovery
- Dshow rsvp session
9Displays contents of LFIB table (XR)
- Ashow mpls forwarding
- Bshow ip mpls forwarding
- Cshow mpls ldp discovery
- Dshow mpls ldp bindings
10Debugs LDP adjacencies, session establishment, and label bindings exchange
- Adebug mpls ldp
- Bdebug ip mpls ldp
- Cdebug mpls packet [interface]
- Ddebug mpls drop
11Debugs labeled packets switched by the router
- Adebug mpls packet [interface]
- Bdebug mpls ldp
- Cdebug mpls drop
12Verifies that all routers on the path of the LSP are configured with at least one Path State Block (PSB) and one Reservation State Block (RSB) per session. (XE)
- Ashow rsvp session
- Bshow ip rsvp session
- Cshow rsvp interface
- Dshow mpls ldp discovery
- Eshow ip rsvp interface
13To display information about all interfaces with RSVP enabled (XR)
- Ashow rsvp interface
- Bshow rsvp session
- Cshow mpls interfaces
- Dshow rsvp
14To display the MPLS TE network topology currently known at this node
- Ashow mpls traffic-eng topology
- Bshow rsvp interface
- Cshow rsvp session
- Dshow mpls ldp discovery
15Displays all classes for the service policy specified in the command line
- Ashow policy-map
- Bshow policy-map interface
- Cshow class-map
- Dshow class-map list
16Displays all service policies applied to the interface.
- Ashow policy-map interface
- Bshow policy-map
- Cshow class-map
- Dshow class-map list
17Lists all class maps with their match statements.
- Ashow class-map
- Bshow policy-map
- Cshow class-map list
- Dshow class-map brief
- Eshow policy-map interface
18To view a list of configured service classes
- Ashow class-map list
- Bshow class-map
- Cshow class-map brief
- Dshow class-map type
19Display statistics gathered by the NBAR Protocol Discovery feature
- Ashow ip nbar protocol-discovery
- Bshow ip nbar port-map
- Cshow ip nbar protocol-discovery top-n
- Dshow ip nbar protocol-discovery stats
20To display the current protocol-to-port mappings in use by NBAR
- Ashow ip nbar port-map
- Bshow ip nbar protocol-discovery
- Cshow ip nbar protocol-discovery stats
- Dshow protocol-discovery protocol
21To verify that the QoS for VPNs feature has been successfully enabled on an interface
- Ashow interfaces
- Bshow crypto map
- Cshow policy-map
- Dshow mpls interfaces
22To verify that the QoS for VPNs feature has been successfully enabled on a crypto map
- Ashow crypto map
- Bshow interfaces
- Cshow policy-map
- Dshow crypto map interface
23Used to display LPTS flows, which are aggregations of identical binding requests from multiple clients and are used to program the LPTS IFIB and pIFIB.
- Ashow lpts flows
- Bshow lpts pifib
- Cshow lpts port-arbitrator
- Dshow lpts ifib
24Displays entries of all or part of a pIFIB
Displays a short description of each entry in the LPTS pIFIB, optionally displaying packet counts for each entry- Ashow lpts pifib
- Bshow lpts flows
- Cshow lpts ifib
- Dshow lpts internal
25Display the configured QOS group
- Ashow queuing <interface>
- Bshow policy-map
- Cshow class-map list
- Dshow class-map
- Eshow policy-map interface
26Describes the Priority queuing algorithm: (Choose 4)
- AUses multiple queues
- BAllows prioritization
- CAlways empties first queue before going to the next queue
- DQueues with lower priority may “starve”
- EAssigns a “weight” to each queue
- FNo prioritization
- GDispatches one packet from each queue in each round
27Describes the Round Robin queuing algorithm. (Choose 3)
- AUses multiple queues
- BNo prioritization
- CDispatches one packet from each queue in each round
- DAlways empties first queue before going to the next queue
- EAllows prioritization
- FDispatches packets from each queue proportionally to an assigned weight
28Describes the Weighted Round Robin queuing algorithm. (Choose 3)
- AAllows prioritization
- BAssigns a “weight” to each queue
- CDispatches packets from each queue proportionally to an assigned weight
- DUses multiple queues
- EDispatches one packet from each queue in each round
- FNo prioritization
29Describes the Deficit Round Robin queuing algorithm. (Choose 5)
- AAllows prioritization
- BAssigns a “weight” to each queue
- CDispatches packets from each queue proportionally to an assigned weight
- DKeeps track of the number of “extra” bytes dispatched in each round— the “deficit”
- EAdds the deficit to the number of bytes dispatched in the next round
- FDispatches one packet from each queue in each round
- GUses multiple queues
- HNo prioritization
- IDeficit round robin (DRR) is an implementation of the WRR algorithm that was developed to resolve the inaccurate bandwidth allocation problem with WRR
30Describes the Modified Deficit Round Robin queuing algorithm. (Choose 4)
- AExtends regular DRR by a low-latency queue serviced in Strict priority mode
- BExtends regular DRR by a low-latency queue serviced in Alternate mode
- CEach queue within MDRR is defined by Quantum value
- DEach queue within MDRR is defined by Deficitcounter
- EExtends regular DRR by a low-latency queue serviced in weight” to each queue
- FExtends regular DRR by a low-latency queue serviced in Allows prioritization
- GEach queue within MDRR is defined by Assigns a “weight” to each queue
- HEach queue within MDRR is defined by one packet from each queue in each round
31Describe the correct point of operations of FRR link protection: (Choose 4)
- ARequires next-hop (NHOP) backup tunnel
- BPoint of Local Repair (PLR) swaps label and pushes backup label
- CBackup terminates on Merge Point (MP) where traffic rejoins primary
- DRestoration time expected under 50 ms
- ERequires next-next-hop (NNHOP) backup tunnel
- FRestoration time depends on failure detection time
- GBackup tunnel with associated bandwidth capacity
- HPLR will decide best backup to protect primary
32Describe the correct point of operations of FRR node protection: (Choose 3)
- APLR will decide best backup to protect primary
- BBackup tunnel may or may not actually signal bandwidth
- CBackup tunnel with associated bandwidth capacity
- DRequires next-next-hop (NNHOP) backup tunnel
- ERestoration time depends on failure detection time
- FPoint of Local Repair (PLR) swaps next-hop label and pushes
backup label - GRequires next-hop (NHOP) backup tunnel
33What is not true of FRR protection?
- ABackup tunnel with associated bandwidth capacity
- BBackup tunnel may or may not actually signal bandwidth
- CBackup terminates on Merge Point (MP) where traffic rejoins primary
- Dfast-reroute command indicate backup for protected LSPs
34tunnel mpls traffic-eng fast-reroute is used for:
- AIndicate the desire for local protection during signaling
- BExplicitly routed backup
- Cbackup for protected LSPs
- DEnable auto- tunnel primary
35What is the correct definition of AutoQoS?
- Ais a best-practice QoS configuration that automatically generates QoS commands.
- Ballows the creation of modular QoS policies and attachment of these policies on the interface.
- Cis CiscoWorks tool that allows a network administrator to create, control, and monitor QoS policies.
- Dcan be used to individually configure QoS policy on each interface.
36What is the correct definition of MQC?
- Aallows the creation of modular QoS policies and attachment of these policies on the interface.
- Bis a best-practice QoS configuration that automatically generates QoS commands.
- Cis CiscoWorks tool that allows a network administrator to create, control, and monitor QoS policies.
- Dcan be used to individually configure QoS policy on each interface.
37What is the correct definition of QPM?
- Acan be used to individually configure QoS policy on each interface.
- Bis a best-practice QoS configuration that automatically generates QoS commands.
- Callows the creation of modular QoS policies and attachment of these policies on the interface.
- Dis CiscoWorks tool that allows a network administrator to create, control, and monitor QoS policies.
38There are two type of cisco Auto QoS. What is the correct two types?
- AVoIP
- BEnterprise
- CModular QoS CLI
- DQoS Policy Manager
39Drawbacks of the Layer 2 overlay solution? (Choose 5)
- AExtra network devices
- BMore complex network management
- CIGP routing scalability issue for meshes
- DAdditional bandwidth overhead (“cell tax”)
- ENo differential service (class of service)
- FPath computation that is based only on an IGP metric is not enough.
- GSupport for “explicit” routing (source routing) is not available.
- HIt does provide controlled backup and recovery.
40What is the purpose of the ip nbar port-map command?
- AA.
configures stateful NBAR to recognize applications based on dynamic port numbers - BB.
configures NBAR to search for a particular protocol using a port number other than the well-known port number - CC.
configure NBAR to recognize non-TCP and non-UDP applications - DD.
configure NBAR for subport classifications (like HTTP URLs or MIME) - EE.
configures NBAR to recognize applications that use FastTrack (like Kazaa, and Morpheus)
- AA.
41Refer to the partial router configuration. Which two of the following statements are true? (Choose two.)
- AA.
The configuration is invalid since it refers to a class map within a different class. - BB.
The class-map class1 command will set the qos-group value to 4 for all IP packets. - CC.
Regardless of destination IP address, all traffic sent to Mac address 1.2.3 will be subject to policing - DD.
Only those packets which satisfy all of the matches in class1 and class2 will be subject to policing. - EE.
All traffic from a server with the IP address of 147.23.54.21 will be subject to policing. - FF.
Any IP packet will be subject to policing.
- AA.
42What does the term serialization delay refer to?
- AA.
a fixed delay referring to the time it takes for a frame to transit the physical media - BB.
a fixed delay referring o the time it takes to encode bits of packets onto the physical interface - CC.
a variable delay caused by packet loss across a congested serial WAN link - DD.
a variable delay caused by the processing tasks of a network device, such as route lookup, header changes, and switching
- AA.
43Which four of the following bit values are used for bits 5-7 of the DSCP field to select AF PHB? (Choose four.)
- AA.
000 - BB.
001 - CC.
010 - DD.
011 - EE.
100 - FF.
101
- AA.
44Which three factors will affect processing delay? (Choose three)
- AA.
CPU speed - BB.
Router architecture - CC.
Queuing mechanism - DD.
Type of media - EE.
IP switching method - FF.
Distance of media
- AA.
45What does the service-policy statement do?
- AA.
Maps a type of traffic and QoS feature to an interface. - BB.
Maps a QoS feature to a type of traffic. - CC.
Differentiates types of traffic. - DD.
Differentiates QoS features.
- AA.
46The qos pre-classify command can be configured under which two configuration modes? (Choose two)
- AA.
router(config)# - BB.
router(config-if)# - CC.
router(config-pmap-c)# - DD.
router(config-crypto-map)# - EE.
router(config-cmap)# - FF.
router(config-router)#
- AA.
47The QoS pre-classify feature is used to ensure QoS services operate in conjunction with which two networking technologies? (Choose two)
- AA.
VoIP - BB.
tunneling - CC.
Frame Relay - DD.
IPsec tunnel mode - EE.
multicast
- AA.
48Which two are important benefits of applying QoS to IP networks? (Choose two)
- AA.
QoS manages packet loss during periods of bursty congestion. - BB.
QoS allows network managers to control usage patterns of network applications. - CC.
QoS can solve traffic problems on low bandwidth, high-latency, high-loss WAN links. - DD.
QoS facilities the integration of differing traffic types such as voice, video, and data into a single infrastructure. - EE.
QoS can provide performance enhancements for commercial application issues such as server sizing and tuning.
- AA.
49With Modular QoS CLI, which command should you use to display the configuration for the specified class of the specified policy map?
- AA.
Show policy - BB.
Show policy-map class - CC.
Show policy-map service - DD.
Show policy-map interface
- AA.
50What is the default number of classes that Assured Forwarding (AF) have?
- A1
- B3
- C4
- D6
- E8
51The QoS design and implementation process comprises of the following steps:
1. characterize network
2. implement policy
3. determine customer priorities/QoS policy
4. monitor network
What is the correct order for these steps?- AA.
4, 1, 3, 2 - BB.
1, 3, 2, 4 - CC.
3, 1, 2, 4 - DD.
1, 2, 3, 4 - EE.
4, 3, 1, 2
- AA.
52Which RED packet drop mode is used when the average queue size has reached or exceeded its maximum?
- AA.
no drop - BB.
tail drop - CC.
random drop - DD.
full drop
- AA.
53In most VPN tunneling, what is the classic QoS problem?
- AA.
VPN overhead eliminates QoS processing time. - BB.
VPN adds too much delay to be used for voice. - CC.
The QoS information is encrypted in the packet being tunneled. - DD.
The QoS information is removed in the encryption process.
- AA.
54Which two statements are true about the DSCP field in an IP header? (Choose two)
- AA.
DSCP is the most significant six bits of the DS field - BB.
DSCP is the least significant six bits of the DS field - CC.
DSCP is used to select the type of service (ToS) - DD.
DSCP is used to select a per-hop behaviour (PHB) - EE.
DSCP is broken into four sub0fields - FF.
DSCP is broker into five sub-fields
- AA.
55What is the default match strategy for a class map? (IOS)
- AA.
match none - BB.
match any - CC.
match some - DD.
match all - EE.
match one
- AA.
56Which term describes the amount of time it takes to place all of the bits in a packet onto a wire?
- AA.
queuing delay - BB.
processing delay - CC.
propagation delay - DD.
serialization delay - EE.
prioritization delay - FF.
optimization delay
- AA.
57What is true about a DSCP marked packet when it reaches an IP precedence based device?
- AA.
The eight DSCP bits are all set to zero. - BB.
The last three bits of the DSCP are set to 101. - CC.
The 8 DSCP AF classes will be mapped into the 8 levels of IP precedence. - DD.
Bits 7-5 of DSCP have the same position and meaning as IP precedence.
- AA.
58How many possible meaningful values are defined in the DSCP in a Differentiated Services environment?
- AA.
3 - BB.
8 - CC.
16 - DD.
32 - EE.
64 - FF.
128
- AA.
59A major media company recently deployed a new converged network. The original network design used separate networks for graphics and video, interactive data, and voice. The company has been experiencing problems with voice traffic in the new converged network. Most of the time voice quality is perfectly acceptable. Periodically voice quality exhibits unacceptable choppy voice signals, and occasionally calls are dropped. At this time the company is not willing to simply add bandwidth to the network.
Which QoS solution would most likely help to resolve the problem?- AA.
Use TCP header compression and LFI to reduce delays. - BB.
Prioritize voice traffic as the highest priority to ensure that voice traffic is always serviced by the priority queue. - CC.
Use advanced technologies to compress all video and graphics traffic on the network. - DD.
Use class-based weighted fair queuing to prioritize voice traffic with a higher weight than all other traffic.
- AA.
60Refer to the exhibit. Which three statements are true about the configuration? (Choose three.)
class-map class-1
match ip rtp 2024 1000
class-map class 2
match dscp 5 6 7
policy-map access-group-1-traffic
class class-1
shape peak 16000
class class-2
police 8000 1000
conform-action set-dscp-transmit 1
exceed-action set-dscp-transmit 0
violate-action drop
class class-default
fair-queue 16
queue-limit 20
interface fastethernet 0/0
service-policy output access-group1-traffic- AA.
Traffic that is subject to shaping can burst up to 32,000 bps. - BB.
IP traffic (DSCPs 5, 6, and 7) that is sent on fastethernet 0/0 will be traffic policed. - CC.
RTP traffic (ports 2024 and 1000) that is sent on fastethernet 0/0 will be traffic shaped. - DD.
Traffic that is subject to policing will have the DCSP set to 0 if the rate exceeds 1000 bps. - EE.
IP traffic (DSCPs 1, 2, 3, and 4) that is sent on fastethernet 0/0 are considered to have a violate status and are dropped. - FF.
IP traffic (DSCP 0) that is sent on fastethernet 0/0 will be subject to fair queuing.
- AA.
61Based on the configuration, which two of the following statements are true? (Choose two.)
policy-map police 1
class bulk-ftp
police cir percent 20 pir percent 40
conform-action set-dscp-transmit af11
exceed-action set-dscp-transmit 0
violate-action drop- AA.
This configuration will use a single token bucket. - BB.
This configuration will drop all exceeding traffic. - CC.
This is a dual-rate, class-based policing example. - DD.
This is a percentage-based policing example. - EE.
This is a multi-action, class-based policing example.
- AA.
62The show policy-map interface command output is showing too many random drops for the mission-critical traffic class. What can be changed to reduce the random drops?
- AA.
Increase the WRED max-threshold value for the mission-critical traffic class. - BB.
Increase the WRED min-threshold value for the mission-critical traffic class. - CC.
Decrease the WRED drop probability denominator for the mission-critical traffic class. - DD.
Decrease the queue-limit for the mission-critical traffic class. - EE.
Enable fair-queue within the mission-critical traffic class.
- AA.
63Traffic classification using NBAR is configured using which IOS command?
- AA.
router(config-cmap)# match protocol {protocol-name} - BB.
router(config-if)# ip nbar protocol-discovery - CC.
router(config)# ip nbar port-map {protocol} [tcp|udp] {port-number} {port-number} …. - DD.
router(config)# ip nbar pdlm {pdlm-file}
- AA.
64Which QoS mechanism adds IP Precedence information for prefixes into the FIB table?
- AA.
QoS pre-classify - BB.
AutoQoS - CC.
QPPB - DD.
Class-Based Marking - EE.
LLQ - FF.
Class-Based WRED
- AA.
65Which mechanism is used for the prioritizing, protection, and isolation of traffic based on marking?
- AA.
classification and marking - BB.
congestion management - CC.
congestion avoidance - DD.
metering - EE.
policing - FF.
shaping
- AA.
66What are two benefits of WFQ? (Choose two.)
- AA.
WFQ is very easy to configure, and no manual traffic classification is necessary. - BB.
WFQ can provide fixed-bandwidth and fixed-delay guarantees. - CC.
WFQ can provide fixed-bandwidth guarantees. - DD.
WFQ can provide fixed-delay guarantees. - EE.
WFQ prevents the large-volume flows with large packet size from starving out the low-volume flows with small packet size. - FF.
Based on DSCP, WFQ allows weighted, random dropping of packets when the WFQ system is full.
- AA.
67What is the purpose of the qos pre-classify command?
- AA.
to enable the IOS to copy the ToS field from the original IP header to the outer tunnel IP header - BB.
to enable the IOS to copy the ToS field from the outer tunnel IP header back into the original IP header - CC.
to enable the IOS to classify the packet based on the original IP header instead of the tunnel IP header - DD.
to enable the IOS to classify the packet based on the outer tunnel IP header instead of the original IP header - EE.
to enable class-based marking on tunnel interface - FF.
to enable class-based marking on IPSec crypto maps
- AA.
68What is another name for Cache-driven switching?
- Aprocess switching
- Bfast switching
- CCisco Express Forwarding
- Dprebuilt FIB table
- EFirst packet always process-switched
69What is another name for Routing table-driven switching?
- Aprocess switching
- Bfast switching
- Cdriven switching
- DprebuiltFIBtable
Information
- Description
- Quiz on Test 4, created by paperina peper on 05/09/2016.
- Author
- paperina peper
- Language
- English
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