CCNP 350-401 Q62

tatrick42034

QUESTION 62
Which LISP device is responsible for publishing EID-to-RLOC mappings for a site?
A.ETR
B.MR
C.ITR
D.MS

Correct Answer: A


各位论坛的大神们有谁可以帮解惑，这题题库答案是A，但我查了参考资料之后感觉是B，大家集思广益下


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底下是我從參考書上翻到的資訊
• Ingress tunnel router (ITR): ITRs are LISP routers that LISP-encapsulate IP packets coming from EIDs that are destined outside the LISP site.
• Egress tunnel router (ETR): ETRs are LISP routers that de-encapsulate LISPencapsulated IP packets coming from sites outside the LISP site and destined to EIDs within the LISP site.
• Map server (MS): This is a network device (typically a router) that learns EIDto-prefix mapping entries from an ETR and stores them in a local EID-to-RLOC mapping database.
• Map resolver (MR): This is a network device (typically a router) that receives LISP-encapsulated map requests from an ITR and finds the appropriate ETR to answer those requests by consulting the map server.

AlltoWell

LISP Egress Tunnel Router
An ETR connects a site to the LISP-capable part of a core network (such as the Internet), publishes EID-to-RLOC mappings for the site, responds to Map-Request messages, and decapsulates and delivers LISP-encapsulated user data to end systems at the site. During operation, an ETR sends periodic Map-Register messages to all its configured map servers. The Map-Register messages contain all the EID-to-RLOC entries for the EID-numbered networks that are connected to the ETR’s site.

https://www.cisco.com/c/en/us/td ... k/irl-overview.html

hensonhu

题目呢。

tatrick42034

tatrick42034

AlltoWell 发表于 2020-7-20 15:49
LISP Egress Tunnel Router
An ETR connects a site to the LISP-capable part of a core network (such a ...

thanks for your reply

xzhibo0

对端

雷雷

不懂，只知道背题库