Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR)377 questions across 38 pages are complete and free, with no account or card.
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Which statement about segment routing prefix segments is true?
Answer: C
Interior gateway protocol (IGP) distributes two types of segments: prefix segments and adjacency segments. A prefix segment is a global segment, so a prefix SID is globally unique within the segment routing domain.
Source: Adapted from community discussion — Gi0v4ne
Refer to the exhibit. After implementing a new design for the network, a technician reviews the pictures CLI output as part of the MOP. Which two elements describe what the technician can ascertain from the ImpNull output? (Choose two.)
Answer: BD
The label value 3 signals the use of the implicit NULL label, the label 3 will never be seen as a label in the label stack of an MPLS packet. That is why it is called the implicit NULL label. The label value 0 is the explicit NULL label. Egress LSR receives labelled packets with a label of value 0 as the top label. 100% correct answer is: B Answers A, C, D, E are incorrect. If answer D would be formulated as follows: "Label 3 is in use for the prefix displayed and will NOT be part of the MPLS label stack for packets destined for 192.168.10.10." - then it would be correct. Assuming, that this is a badly formulated answer by CISCO, where I would have to provide 2 answers - I would choose: B, D
Source: Adapted from community discussion — blizzlondon
Refer to the exhibit. Router 1 was experiencing a DDoS attack that was traced to interface gigabitethernet0/1. Which statement about this configuration is true?
Answer: C
Reference: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nx-os/security/configuration/guide/sec_nx-os-cfg/sec_urpf.html
A router RP is configured to perform MPLS LDP graceful restart. Which three steps are included when the RP sends an LDP initialization message to a neighbor to establish an LDP session? (Choose three.)
Answer: BDF
Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_ha/configuration/xe-16-8/mp-ha-xe-16-8-book/nsf-sso-mpls-ldp-and-ldp-graceful-restart.html
Source: Adapted from community discussion — Cprest
DRAG DROP - Drag and drop the OSPF and IS-IS Cisco MPLS TE extensions from the left to their functional descriptions on the right. Select and Place:
This is an interactive task on the real exam — a drag-and-drop, hotspot or ordering question. There is nothing to select here, so the answer is shown below for reference.
Answer: See figure below
From the link provided by nolbi: TLV Type 2: 8 bits (...but only six out of eight bits are used.) TLV Type 134: TE Router ID , MPLS traffic engineering router ID TLV Type 135: Provides a 32 bit metric and adds a bit for the "up/down" Type-10 Opaque : LSAs are not flooded beyond the borders of their associated area Type 22: The metric octets are encoded as a 24-bit unsigned integer. and i think that advertise links and sub-tlv "This will allow advertisement of a link for purposes other than building the normal Shortest Path Tree." in https://datatracker.ietf.org/doc/html/rfc5305#section-3
Source: Adapted from community discussion — murmelika
DRAG DROP - Drag and drop the methods of Cisco MPLS TE tunnel traffic assignment from the left onto their characteristics on the right. Select and Place:
This is an interactive task on the real exam — a drag-and-drop, hotspot or ordering question. There is nothing to select here, so the answer is shown below for reference.
Answer: See figure below
autoroute --- Dynamic traffic tunnels static --- Static traffic tunnels PBTS --- Policy Based Tunnel Selection (optimise streaming services) CBTS --- Class Based Tunnel Selection (forward traffic based on different class of service (CoS) values
Source: Adapted from community discussion — ccie_race
Refer to the exhibit. What type of configuration is it?
Answer: C
What are two characteristics of MPLS TE tunnels? (Choose two.)
Answer: AD
Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_te_path_setup/configuration/xe-3s/mp-te-path-setup-xe-3s-book/mp-te-auto-bandwdth.html https://www.ciscopress.com/articles/article.asp?p=426640&seqNum=2
What is the characteristic of the TI-LFA?
Answer: D
TI-LFA can be configured on the instance, area, or interface. When configured on the instance or area, all interfaces in the instance or area inherit the configuration. Reference: https://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/asr9k-r6-3/segment-routing/configuration/guide/b-segment-routing-cg-asr9000-63x/b- segment-routing-cg-asr9000-63x_chapter_01001.pdf
Source: Adapted from community discussion — Cprest
Refer to the exhibit. An engineer is preparing to implement data plane security configuration. Which statement about this configuration is true?
Answer: C
Answer is C. Router one is acting like a black hole: "RTBH filtering provides a method for quickly dropping undesirable traffic at the edge of the network, based on either source addresses or destination addresses by forwarding it to a null0 interface. Null0 is a pseudointerface that is always up and can never forward or receive traffic. Forwarding packets to null0 is a common way to filter packets to a specific destination."
Source: Adapted from community discussion — beenardino
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