Exam 350-501 topic 1 question 16 discussion

Actual exam question from Cisco's 350-501

Question #: 16
Topic #: 1

[All 350-501 Questions]

Which additional feature does MPLS DiffServ tunneling support?

A. matching EXP and DSCP values
B. PHB layer management
C. using GRE tunnels to hide markings
D. interaction between MPLS and IGP

Show Suggested Answer

Suggested Answer: B 🗳️
Reference:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_te_diffserv/configuration/15-mt/mp-te-diffserv-15-mt-book/mp-diffserv-tun-mode.html

by zrrhz at July 24, 2023, 1:37 p.m.

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Abbribas

9 months, 3 weeks ago

Selected Answer: B

Diffserv Tunneling Modes introduces a new Per-Hop-Behavior (PHB), which allows differentiated QoS in a providers network. https://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switching-mpls/mpls/47815-diffserv-tunnel.html

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Abbribas

9 months, 3 weeks ago

additional is the Keyword

upvoted 2 times

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pobaro

1 year, 7 months ago

Which additional feature does MPLS DiffServ tunneling support? The following features are supported on MPLS DiffServ Tunneling Modes: MPLS per-hop behavior (PHB) layer management. There is improved scalability of the MPLS layer management by control on managed customer edge (CE) routers. MPLS can “tunnel” a packet's QoS (that is, the QoS is transparent from edge to edge)

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Duncan1016

1 year, 9 months ago

A cannot be correct. "The MPLS experimental (MPLS EXP) field can be marked differently and independently of the PHB marked in the IP Precedence or differentiated services code point (DSCP) field." https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_te_diffserv/configuration/15-mt/mp-te-diffserv-15-mt-book/mp-diffserv-tun-mode.html

upvoted 1 times

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dodds

1 year, 11 months ago

Agreed, A is correct

upvoted 1 times

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zrrhz

1 year, 11 months ago

A is correct

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