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- 642-887 - Implementing Cisco Service Provider Next-Generation Core Network Services
- Cisco.642-887.v2018-06-13.q129
- 質問34
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「231問、３０％ ディスカウント、特別な割引コード：JPNshiken」
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?
正解：A
Explanation/Reference:
Explanation:
http://www.cisco.com/en/US/tech/tk543/tk545/technologies_tech_note09186a008017405e.shtml The qos pre-classify command
When packets are encapsulated by tunnel or encryption headers, QoS features are unable to examine the original packet headers and correctly classify the packets. Packets traveling across the same tunnel have the same tunnel headers, so the packets are treated identically if the physical interface is congested. With the introduction of the Quality of Service for Virtual Private Networks (VPNs) feature, packets can now be classified before tunneling and encryption occur. In this example, tunnel0 is the tunnel name. The qos pre- classify command enables the QoS for VPNs feature on tunnel0:
Router(config)# interface tunnel0
Router(config-if)# qos pre-classify
Explanation:
http://www.cisco.com/en/US/tech/tk543/tk545/technologies_tech_note09186a008017405e.shtml The qos pre-classify command
When packets are encapsulated by tunnel or encryption headers, QoS features are unable to examine the original packet headers and correctly classify the packets. Packets traveling across the same tunnel have the same tunnel headers, so the packets are treated identically if the physical interface is congested. With the introduction of the Quality of Service for Virtual Private Networks (VPNs) feature, packets can now be classified before tunneling and encryption occur. In this example, tunnel0 is the tunnel name. The qos pre- classify command enables the QoS for VPNs feature on tunnel0:
Router(config)# interface tunnel0
Router(config-if)# qos pre-classify
- 質問一覧「129問」
- 質問1 On a Cisco router, when will the router actually reserve the...
- 質問2 Which two network devices are trusted endpoints in a network...
- 質問3 Which three network services can be implemented using MPLS w...
- 質問4 Which two characteristics describe the difference between MP...
- 質問5 Select and Place: (Exhibit)
- 質問6 Layer 2 VPN services that are offered by traditional service...
- 質問7 Which three fields must be the same in an IPv6 header to con...
- 質問8 What is the term that is used for the label that an LSR assi...
- 質問9 Scenario: (Exhibit) On the PE8-router what is the label valu...
- 質問10 An engineer is setting up a routing instance to route the tr...
- 質問11 On a Cisco IOS XR router, which mechanism protects the route...
- 質問12 Which two fields are in the traffic engineering topology dat...
- 質問13 According to the Intserv model, which two options are traffi...
- 質問14 Scenario: (Exhibit) After reviewing present router configura...
- 質問15 Which three statements are correct regarding ping mpls comma...
- 質問16 (Exhibit) Refer to the exhibit. Which configuration error pr...
- 質問17 Select and Place: (Exhibit)
- 質問18 Which Cisco IOS XR command should be used to identify if MPL...
- 質問19 (Exhibit) Refer to the exhibit. Based on the raw format of a...
- 質問20 Which option describes what happens when a labelled packet w...
- 質問21 Within the service provider core network, which two QoS mech...
- 質問22 On Cisco routers, how is hierarchical QoS implemented?...
- 質問23 Implementing IPoDWDM interfaces on Cisco CRS routers elimina...
- 質問24 Which method is used to mark traffic matched by class-map MY...
- 質問25 How many labels does an MPLS packet have, with a bottom-of-s...
- 質問26 Which three options are class maps able to match? (Choose th...
- 質問27 Refer to the Cisco IOS XR configuration exhibit. (Exhibit) W...
- 質問28 Which affinity and mask value will match the link affinity t...
- 質問29 Scenario: (Exhibit) From PE8 router, what is the label actio...
- 質問30 A network operations center requests support to configure a ...
- 質問31 When implementing Cisco MPLS TE, the constrained-based path ...
- 質問32 Which three mechanisms are used to implement MPLS TE? (Choos...
- 質問33 Which QoS mechanism is used for congestion avoidance?...
- 質問34 The Cisco IOS and IOS XE qos pre-classify command allows whi...
- 質問35 An LDP session is established between two neighbors. Over wh...
- 質問36 An engineer has been tasked to configure a guaranteed 10 Mbp...
- 質問37 Which two of the following statements are correct regarding ...
- 質問38 (Exhibit) Refer to the exhibit. From which table was the inf...
- 質問39 Select and Place: (Exhibit)
- 質問40 A DSCP value of 41 in decimal corresponds to which IP preced...
- 質問41 In Cisco MPLS TE implementations, what can cause the tunnel ...
- 質問42 Which statement is correct regarding the default MPLS TTL be...
- 質問43 Which of the following three statements are correct regardin...
- 質問44 Which are typical class-based marking policies that are impl...
- 質問45 (Exhibit) Refer to the partial Cisco IOS XR configurations e...
- 質問46 On Cisco routers, which three methods can be used to map tra...
- 質問47 (Exhibit) Referring to the Cisco IOS XR show command output ...
- 質問48 Scenario: (Exhibit) On CE7 which statement is correct regard...
- 質問49 Scenario: (Exhibit) From the PE8 router, how many total pref...
- 質問50 A service provider recently defined new SLA services that pr...
- 質問51 Which protocol is used to send MPLS OAM traffic over an MPLS...
- 質問52 Which configuration fulfills the requirement of configuring ...
- 質問53 Which three options can an engineer select for a traffic pol...
- 質問54 What is an important requirement with MPLS applications like...
- 質問55 (Exhibit) Only based on the Cisco IOS XR policy-map configur...
- 質問56 (Exhibit) Referring to the show output exhibit, which statem...
- 質問57 When implementing MPLS DS-TE on Cisco IOS XR routers, all ag...
- 質問58 Scenario: (Exhibit) On P2IOS-XR router what is targeted LDP ...
- 質問59 When implementing CBWFQ, where should Weighted Random Early ...
- 質問60 When using the tunnel mpls traffic-eng path-option 1 explici...
- 質問61 Which three steps are required to configure QPPB on Cisco IO...
- 質問62 On the Cisco IOS XR, when using the match protocol command w...
- 質問63 A company asks an engineer to provide an explanation for imp...
- 質問64 An engineer is tasked to deploy Fast Reroute for Cisco MPLS ...
- 質問65 Select and Place: (Exhibit)
- 質問66 Which Cisco IOS XR command should be used in order to enable...
- 質問67 A network engineer must design a core network routing domain...
- 質問68 Which two statements are correct in describing ISP environme...
- 質問69 Which two features are used to provide Cisco MPLS TE node an...
- 質問70 Which four options are methods by which labels can be assign...
- 質問71 Which three statements are correct regarding a Cisco MPLS TE...
- 質問72 When configuring class-based WRED on Cisco routers, which WR...
- 質問73 Which four options describe the functions of the control wor...
- 質問74 An engineer is working in a service provider environment to ...
- 質問75 Which two considerations are important when implementing a C...
- 質問76 When implementing MPLS TE tunnels on Cisco IOS XR routers, w...
- 質問77 Which three conditions can occur when metering traffic using...
- 質問78 In an IPv6 header, what does a flow label of zero indicate?...
- 質問79 Which option is a Cisco-recommended congestion management or...
- 質問80 An engineer has been tasked to configure a guaranteed 2 Mbps...
- 質問81 On Cisco routers, which QoS marker is only locally significa...
- 質問82 Which statement describes the QoS behavior between P and PE ...
- 質問83 Which item is not available to be used for QoS classificatio...
- 質問84 A network engineer must analyze RSVP-TE signaling on a syslo...
- 質問85 When troubleshooting LDP operations on the Cisco IOS and IOS...
- 質問86 (Exhibit) Referring to the traceroute output exhibit that is...
- 質問87 Which field in the MPLS shim header is used to support diffe...
- 質問88 The network architecture team is proposing to enable Cisco M...
- 質問89 DS-TE implementations on Cisco routers support which bandwid...
- 質問90 Cisco MPLS TE path setup can be affected by which three tunn...
- 質問91 (Exhibit) Referring to the Cisco IOS XR configuration exhibi...
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- 質問93 Cisco MPLS TE resource attributes that are configured locall...
- 質問94 Which option is the appropriate method for CBWFQ WRED implem...
- 質問95 A network operations center analyzes a Wireshark capture and...
- 質問96 What are the four fields inside the MPLS shim header? (Choos...
- 質問97 Which affinity value will be matched by the affinity bit mas...
- 質問98 Which four pieces of information are stored for each prefix ...
- 質問99 What is the correct formula for determining the CIR?...
- 質問100 Which Cisco IOS XR command should be used in order to enable...
- 質問101 Select and Place: (Exhibit)
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- 質問103 Given this configuration of an interface for MPLS traffic en...
- 質問104 On the Cisco ASR9K router, when using the bandwidth command ...
- 質問105 In which two Cisco IOS XR configuration modes can mpls ldp i...
- 質問106 You are tasked to enable LDP on many of the interfaces on th...
- 質問107 Which configuration can a network engineer use to establish ...
- 質問108 Scenario: (Exhibit) On PE7 which statement is correct regard...
- 質問109 LDP session protection uses which one to maintain the LDP se...
- 質問110 Which option is the appropriate way to configure a color-awa...
- 質問111 The Cisco IOS and IOS XE qos pre-classify command allows whi...
- 質問112 Which Cisco IOS XR high-availability feature is used to prev...
- 質問113 Which two traffic types are recognized by NBAR default confi...
- 質問114 An engineer is allocating a determined amount of bandwidth t...
- 質問115 Which method maps MPLS EXP bit 5 to COS 5 on Cisco IOS XE?...
- 質問116 When defining an explicit MPLS TE tunnel path, which two com...
- 質問117 A network engineer must make a reservable maximum bandwidth ...
- 質問118 On the Cisco IOS XR, which MQC configuration is different th...
- 質問119 With unmanaged CE routers, at which point in the service pro...
- 質問120 Scenario: (Exhibit) On CE 7 router, which statement is corre...
- 質問121 Cisco MPLS TE tunnels recently have been deployed to minimiz...
- 質問122 When a link flaps, an mpls ldp session will also flap. Which...
- 質問123 Select and Place: (Exhibit)
- 質問124 An engineer wants to extend the trust boundary to a Cisco IP...
- 質問125 The regional operation center deploys a Cisco MPLS TE tunnel...
- 質問126 Which QoS technique can be used to protect customer traffic ...
- 質問127 (Exhibit) Refer to the exhibit. XR2 needs to have LDP config...
- 質問128 (Exhibit) Referring to the Cisco IOS XR show command output ...
- 質問129 (Exhibit) Refer to the Cisco IOS XR policy-map configuration...
