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Exam 350-501 topic 1 question 253 discussion

Actual exam question from Cisco's 350-501
Question #: 253
Topic #: 1
[All 350-501 Questions]

An engineer must apply an 802.1ad-compliant configuration to a new switchport with these requirements:
✑ The switchport must tag all traffic when it enters the port.
✑ The switchport is expected to provide the same level of service to traffic from any customer VLAN.
Which configuration must the engineer use?

  • A. interface GigabitEthernet1/0/1 switchport mode trunk switchport trunk encapsulation dot1q encapsulation ISL bridge-domain 12
  • B. interface GigabitEthernet1/0/1 ethernet dot1ad uni c-port service instance 12 encapsulation dot1q rewrite ingress tag push dot1ad 21 symmetric bridge-domain 12
  • C. interface GigabitEthernet1/0/1 ethernet dot1ad uni s-port service instance 12 encapsulation default rewrite ingress tag push dot1ad 21 symmetric bridge-domain 12
  • D. interface GigabitEthernet1/0/1 ethernet dot1ad nni service instance 12 encapsulation dot1ad bridge-domain 12
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Suggested Answer: C 🗳️
by thejag at Feb. 22, 2023, 11:51 a.m.

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bass12345678
2 months, 1 week ago
Selected Answer: C
https://www.cisco.com/c/en/us/td/docs/routers/asr920/configuration/guide/ce/17-1-1/b-ce-xe-17-1-asr920/b-ce-xe-17-1-asr920_chapter_01111.pdf
upvoted 1 times
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thejag
8 months ago
C looks correct A. there is no "encapsulation isl" option B. "C-UNI—an be either an access port or an 802.1Q trunk port. The port uses the customer bridge addresses. C. "S-UNI—an access port that provides the same service to all customer VLANs entering the interface, marking all C-VLANs entering the port with the same S-VLAN. In this mode, the customer's port is configured as a trunk port, and traffic entering the S-UNI is tagged. D. there is no "encapsulation dot1ad" option https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/cether/configuration/xe-3s/asr903/16-12-1/b-ce-xe-16-12-asr900/m_ce_802_1ad_900.html https://content.cisco.com/chapter.sjs?uri=/searchable/chapter/www.cisco.com/content/en/us/td/docs/switches/metro/me3600x_3800x/software/release/15-4_3_S/configuration/guide/3800x3600xscg/sw802_one_ad.html.xml
upvoted 4 times
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