4A0-105 Exam Questions

The "discard-unknown" command has been enabled at the VPLS level. Which of the following statements is true? (Choose 2)

Which of the following statements regarding unicastand multicast frames is true for a traditional layer 2 switch? (Choose 2)

What option is available when using PBB to reduce the amount of required VPLS services?

Click on the exhibit below. The SAP on PE-A has been configured with dot1q encapsulation. The SAP on PE-B has been configured with qinq encapsulation. CE-A sends frames with a sing...

Click on the exhibit below. If the device connected to PE-A in Metro A sends a frame to PE-A that requires replication within the VPLS which devices is PE-A responsible for replica...

The command "send flush-on-failure" has been enabled within a VPLS instance. What does the PE do upon detection of a SAP failure within the VPLS?

Which physical topology is NOT commonly deployed in today's VPLS networks?

An l-VPLS can be associated with many B-VPLS services.

Click on the exhibit below. CE-A sends frames with 2 tags. If the SAP on PE-A is "sap 1/1/1:1 .*" and the SAP on PE- B is "sap 1/1/1:100.200" how many tags will there be on the fra...

Click on the exhibit below. Which port will become the alternate port?

The following question relates to this command syntax: "config>service# vpls 9000 customer 6 create". Which of the following statements are correct? (Choose 2)

Which of the following are required for an operational mesh-sdp binding for bidirectional traffic when signaling is enabled within the SDP?(Choose 3)

The service mtu of a VPLS is set to 9100. What is the recommended MTU value that can be set for the access port assuming dot1q encapsulation?

How does PBB forward broadcast, unknown-unicast and multicast traffic from a B-VPLS to an l- VPLS?

The service-mtu of a VPLS using MPLS encapsulation is set to 9100. What is the minimum MTU value that can be set for the network port if fast re-route facility mode is used on the...

A router has just learned the 10th MAC address while the FDB size is also set to 10. What is the likely outcome?

Click on the exhibit below. Which port will become the alternate port?

In IEEE 802.1ag,which two key functions are configured on bridge ports (SAPs and SDPs) to support CFM messages? (Choose 2)

An MC-LAG is configured with default parameters. When a failed interface recovers, the active link reverts to the restored interface.

What action will be taken when an MPLS router receives a frame with a label that does not exist in the LFIB?

Which of the following needs to be considered when designing Ethernet networks with redundancy?

Which of the following must be true in order to add a port to a LAG? (Choose 2)

Which of the following is a true statement?

Which of the following are true when ports are configured with the IEEE 802.3ah Loopback Control feature? (Choose 3)

In RSTP, how is the root bridge selected?

Click on the exhibit below. CE-A is on VLAN 200 and CE-B is on VLAN 300. Which of the following SAP ids can be configured on PE-A and PE-B to allow direct communication between CE-...

What action will be taken when an Ethernet switch receives a frame with a known DA and an outer Ethertype value of 0x0800 on a dot1q encapsulated port?

What function in IEEE 802.1 ah helps to limit the amount of MAC addresses learned in the core?

A LAG is configured with LACP passive mode enabled.When will LACP packets be sent?

In IEEE 802.1ag,how are loops detected?

The operation of a VPLS can be best described by which of the following statements?

Click on the exhibit below. In the diagram below, SAP 1 is put into the blocking state as a result of the spanning tree protocol. What will occur in the VPLS instance if SAP 2 goes...

Click on the exhibit below. A new router named PE-D is to be directly connected to PE-C and is required to be added to the existing VPLS 300. The design requires the least amount o...

Click on the exhibit below. Assume PE-B expects avian tag as part of the RFC 4762 (Martini) encapsulation. How must PE- A be configured?

What is PBB also known as?

An l-VPLS is configured with a service id of 511. What will the value of the l-SID be assuming a default configuration?

Which failure scenario is NOT supported by IEEE 802.lag?

Click on the exhibit below. Based on the following configuration which VLANs will be managed by the management VPLS?

Click on the exhibit below. Based on the service-mtu of this B-VPLS, what is the maximum service-mtu of any connectingI- VPLS attached to this B-VPLS?

Which of the following best describes the difference between VPWS and VPLS?

After the "disable-learning" command has been executed at the VPLS level, a new client device originates a frame. What is the result?

In the IEEE 802.1 ag, how are merged services detected?

Click on the exhibit below. The MDU attached to this PE has been configured with active/standby SDP's configuration option has been configured for the PE to recognize that this SDP...

Click on the exhibit below. Assume the port on CE-A is sending two tags, a top tag of 100 and a bottom tag of 500. PE-A is configured with a SAP id of 1/1/1:100.*. How should PE-B...

Click on the exhibit below. The following IP filter has been configured and applied to a SAP in a non-VPLS service. Which of the following statements is true?

Which PDU type is sent periodically over a link in the IEEE 802.3ah EFM as a method of keepalive?

In Rapid Spanning Tree Protocol, a Backup Port is on the same switch as a Designated Port?

Consider a large metro-to-metro VPLS network interconnected with a mesh of mesh-SDPs. Which of the following statements does NOT apply to this situation?

Which of the following statements about the VC-ID is false?

MC-LAG provides link and node protection from an MDU to 3 or more PE devices.