A service provider is connecting two branch offices of a retail bank. Each branch has a single Ethernet switch that carries untagged traffic for the bank's internal network. The bank requires a simple, dedicated point-to-point connection between the two sites with no other customer sharing the link. The provider's metro Ethernet network uses 802.1Q trunking internally. Which service type and VLAN tag operation should the provider implement on the access ports facing the bank?

E-LAN service with VLAN translation from untagged to a provider VLAN

E-Access service with VLAN tag pop to remove the customer's 802.1Q tag at the provider edge

E-Line service with VLAN tag push to map untagged customer traffic into a provider VLAN

E-Tree service with the two branches as leaves and the provider core as root

A service provider is deploying 802.1ad (QinQ) on its edge switches to offer Ethernet services to multiple customers over a shared infrastructure. A customer sends frames tagged with VLAN 10 (C-TAG). The provider needs to add an S-TAG of 100 to identify this customer's service. The customer's frames must be delivered to the customer's remote site with the original C-TAG intact. What tag manipulation should the provider perform at the customer-facing (UNI) port?

Translate the C-TAG 10 to S-TAG 100 and keep the original C-TAG as a second tag

Pop the C-TAG 10 and push an S-TAG of 100, leaving a single-tagged frame

Push an S-TAG of 100 onto the existing C-TAG 10, creating a double-tagged frame

Swap the C-TAG 10 with an S-TAG of 100, leaving a single-tagged frame

A service provider offers an E-Line service with a strict SLA that includes a maximum one-way delay of 10 ms and a maximum frame loss ratio of 0.01%. The provider needs to verify that the SLA is being met on an ongoing basis. Which combination of Ethernet OAM protocols should the provider use?

IEEE 802.3ah Link OAM for loopback testing and IEEE 802.1ag CFM for jitter measurement

IEEE 802.1ag CFM for delay measurement and ITU Y.1731 for loss measurement

IEEE 802.3ah Link OAM for delay measurement and IEEE 802.1ag CFM for loss measurement

ITU Y.1731 for both delay and loss measurement

A service provider uses QinQ (802.1ad) to offer Ethernet services. A customer sends frames with C-TAGs 10, 20, and 30. The provider wants to offer the customer a service where only C-TAG 10 is mapped to S-TAG 100, and C-TAGs 20 and 30 are mapped to S-TAG 200. What type of QinQ configuration should the provider use?

Standard QinQ, where all C-TAGs are mapped to a single S-TAG

MAC-in-MAC encapsulation, where the entire frame is encapsulated

VLAN translation, where C-TAGs are swapped with S-TAGs

Selective QinQ, where specific C-TAGs are mapped to specific S-TAGs

CiscoCertified Network Professional Service Provider

Domain 4Objective 2

4.2 Configure L2VPN and Carrier Ethernet 350-501 Practice Questions (Page 8)

Part of the Services domain, which accounts for 20% of the 350-501 exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~10–16 in this domain), expect 2–3 from this objective — we provide 39 practice questions to prepare you well beyond it. (estimate)

39questions here

8free pages

14concepts

20%of the exam

Questions 36–39

36application · medium
A service provider is connecting two branch offices of a retail bank. Each branch has a single Ethernet switch that carries untagged traffic for the bank's internal network. The bank requires a simple, dedicated point-to-point connection between the two sites with no other customer sharing the link. The provider's metro Ethernet network uses 802.1Q trunking internally. Which service type and VLAN tag operation should the provider implement on the access ports facing the bank?
Select an answer first
37application · easy
A service provider is deploying 802.1ad (QinQ) on its edge switches to offer Ethernet services to multiple customers over a shared infrastructure. A customer sends frames tagged with VLAN 10 (C-TAG). The provider needs to add an S-TAG of 100 to identify this customer's service. The customer's frames must be delivered to the customer's remote site with the original C-TAG intact. What tag manipulation should the provider perform at the customer-facing (UNI) port?
Select an answer first
38application · medium
A service provider offers an E-Line service with a strict SLA that includes a maximum one-way delay of 10 ms and a maximum frame loss ratio of 0.01%. The provider needs to verify that the SLA is being met on an ongoing basis. Which combination of Ethernet OAM protocols should the provider use?
Select an answer first
39application · medium
A service provider uses QinQ (802.1ad) to offer Ethernet services. A customer sends frames with C-TAGs 10, 20, and 30. The provider wants to offer the customer a service where only C-TAG 10 is mapped to S-TAG 100, and C-TAGs 20 and 30 are mapped to S-TAG 200. What type of QinQ configuration should the provider use?
Select an answer first

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4.2 Configure L2VPN and Carrier Ethernet 350-501 Practice Questions (Page 8)

Questions 36–39

A service provider offers an E-Line service with a strict SLA that includes a maximum one-way delay of 10 ms and a maximum frame loss ratio of 0.01%. The provider needs to verify that the SLA is being met on an ongoing basis. Which combination of Ethernet OAM protocols should the provider use?

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