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CCNP Service Provider 642-887 」とゴーリキーは述べました。

我々の開発するCiscoの642-887 - Implementing Cisco Service Provider Next-Generation Core Network Services練習問題ソフトは最新で最も豊富な問題集を含めています。 さて、はやく試験を申し込みましょう。NewValidDumpsはあなたを助けることができますから、心配する必要がないですよ。

我々はほぼ100％の通過率であなたに安心させます。すべての売主は試験に失敗したら全額で返金するのを承諾できるわけではない。我々NewValidDumpsのITエリートと我々のCiscoの642-887練習問題試験のソフトに満足するお客様は我々に自信を持たせます。

Cisco 642-887練習問題 - NewValidDumpsから大変助かりました。

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70％の問題は解説がありますし、試験の内容を理解しやすいと助けます。常にCisco　642-887練習問題試験に参加する予定があるお客様は「こちらの問題集には、全部で何問位、掲載されておりますか？」といった質問を提出しました。

642-887 PDF DEMO:

QUESTION NO: 1
Which two network devices are trusted endpoints in a network? (Choose two.)
A. PC
B. video endpoint
C. IP phone
D. wireless clients
Answer: B,C

QUESTION NO: 2
Which four pieces of information are stored for each prefix in the LFIB? (Choose four.)
A. incoming interface
B. next-hop IP address
C. outgoing interface
D. Layer 2 header rewrite information
E. outgoing label
F. local label
Answer: B,C,E,F
Explanation
Forwarding Labeled Packets
LSR forwards the packet based on:
Top Label value of the received packet
Corresponding entry in LFIB (LABEL <=> INTERFACE)
#show mpls forwarding-table - will show:
local label
outgoing label
prefix (network)
outgoing interface
next-hop
LSR expects packet to come with "top" label being "Local" (from show mpls forwarding-table).
If Outgoing label is "Aggregate", then that means that this is a summary route and more specific lookup is performed.
If LSR cannot find label/interface mapping in LFIB, then it drops the packet.
There are several "RESERVED" labels numbered from 0 to 15:
0 - explicit NULL - is used to preserver QoS info through EXP bits. It copies 'ip prec' or DiffServ.
1 - Router alert label - forces LSR to software switch the packet.
3 - Implicit NULL - this label is used for "connected" or "summary" routes. This way LSR signals it s neighbors to execute "POP label" operation on "connected" routes. It is called PHP, Penultimate
Hop Popping, and is used to make sure that LSR does not perform 2 lookups (label + ip).
14 - OEM alert label - is used for monitoring purpose.
In Cisco IOS, the default range is 16 through 100,000, but can be expanded by using "mpls label range" command.

QUESTION NO: 3
Which two statements are correct in describing ISP environments that are running IP/MPLS in the core network? (Choose two.)
A. On the PE routers, each BGP route must use a unique label to reach the BGP next hop.
B. The PE and P routers run LDP to learn the labels for reaching the BGP next-hop addresses.
C. A full mesh of IBGP sessions are required between all of the PE and P routers to ensure proper packets forwarding.
D. The BGP next hops point to the PE routers, and only the PE routers are required to run BGP.
Answer: B,D

QUESTION NO: 4
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. resource class affinity
B. IP address
C. MPLS label
D. tunnel endpoint
Answer: B
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

QUESTION NO: 5
Given this configuration of an interface for MPLS traffic engineering on a Cisco IOS XE router:
interface POS1/1/0
mpls traffic-eng tunnels
ip rsvp bandwidth 5000
Which option lists the equivalent configurations required on a Cisco IOS XR router?
A. mpls traffic-eng
interface POS1/1/0
B. mpls traffic-eng
interface POS1/1/0
rsvp
interface POS1/1/0
bandwidth 5000
C. interface POS1/1/0
mpls traffic-eng tunnels
ip rsvp bandwidth 5000
D. mpls traffic-eng
interface POS1/1/1
bandwidth 5mb
E. mpls traffic-eng
interface POS1/1/0
rsvp
interface POS1/1/0
Answer: B

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Updated: May 28, 2022