4.2 Configure L2VPN and Carrier Ethernet 350-501 Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   Which VLAN translation method maps multiple customer VLANs to a single provider VLAN?

   • A1:1 translation
   • BQinQ translation
   • CFlexible translation
   • DN:1 translation
   Reveal Solution Discussion Select an answer first
2. 22application · easy

   A service provider is offering a premium E-Line service with an SLA that specifies a maximum one-way delay of 5 ms and a maximum frame loss ratio of 0.001%. The provider needs to measure these metrics accurately to verify SLA compliance. Which Y.1731 performance monitoring function should the provider use for each metric?

   • AUse the Loss Measurement (LM) function for delay and the Delay Measurement (DM) function for loss
   • BUse IEEE 802.1ag CFM continuity check messages (CCMs) for both delay and loss
   • CUse IEEE 802.3ah Link OAM loopback for delay and link monitoring for loss
   • DUse the Delay Measurement (DM) function for delay and the Loss Measurement (LM) function for loss
   Reveal Solution Discussion Select an answer first
4. 23foundation · easy

   Which statement correctly describes an E-LAN service?

   • AA multipoint-to-multipoint Ethernet virtual connection that allows any-to-any communication among all connected UNIs
   • BA point-to-point Ethernet virtual connection between two UNIs
   • CAn access Ethernet virtual connection that connects a subscriber to a service provider network
   • DA rooted multipoint Ethernet virtual connection with root-to-leaf communication only
   Reveal Solution Discussion Select an answer first
5. 24foundation · easy

   Which Ethernet OAM protocol is used for performance monitoring, including delay and loss measurement?

   • AITU Y.1731
   • BIEEE 802.1ah
   • CIEEE 802.1ag
   • DIEEE 802.3ah
   Reveal Solution Discussion Select an answer first
6. 25application · medium

   A service provider is connecting a customer's two sites. The customer uses VLAN 100 at site A and VLAN 200 at site B. The provider wants to offer a single E-Line service between the two sites without requiring the customer to change their VLANs. The provider's internal network uses VLAN 500 for this service. What VLAN translation method should the provider use?

   • AN:1 VLAN translation at both sites, mapping all customer VLANs to VLAN 500
   • BFlexible VLAN translation at site A only, mapping VLAN 100 to VLAN 500
   • C1:1 VLAN translation at both sites, mapping VLAN 100 to VLAN 500 at site A and VLAN 200 to VLAN 500 at site B
   • DQinQ tag stacking, adding an S-TAG of 500 to the customer's C-TAG at both sites
   Reveal Solution Discussion Select an answer first