4A0-105 Exam Questions

One of the shortcomings of Spanning Tree Protocol (STP) is that it computes a valid, but not necessarily optimal, path between nodes within a network.

Which of the following features can be enabled to eliminate MAC instability when using policy- based forwarding to redirect traffic to a Layer 2 DPI device?

Click on the exhibit below. Which ports will become root ports? (Choose 3)

The FDB has learned 2 MAC addresses. The first is from a device accessible via a locality defined SAP, the second is from a device accessible via an SDP. Both MAC addresses were le...

When deploying Active/Standby pseudowires,the CE does not require any special configuration

Which of the following is a true statement?

What is the MTU impact on the SDP path-mtu if fast reroute facilities-mode is implemented on the LSP?

What is the result of initiating an oam mac-ping to an unknown unicast MAC address in a VPLS instance?

Why is it best practice to set the bridge priority in an STP network? (Choose 2)

When ports configured with IEEE 802.3ah EFM are operationally down, what must the device do before declaring the ports are up?

Multiple VPLS services can be offered over the same set of LSP tunnels?

What must be enabled in order to prevent a loop within a LAG?

What type of SDP cannot be configured in an l-VPLS?

In RSTP,which state do all ports initialize in?

Click on the exhibit below. Based on the following output what will the vc-id be of any mesh-sdp bound to this service?

What is the maximum number of VLANs supported on a traditional Layer 2 switch?

Which of the following describes the setting of the l-SID on the Alcatel-Lucent 7750 SR?

Which of the following describes the overhead added to a customer frame on an Ethernet link in a VPLS service on the Alcatel-Lucent 7750 SR?

What is the DA address used for in the Ethernet Header?

Click on the exhibit below. Which SDP on R3 will MAC addresses be associated with for devices behind R2?

What needs to be configured in a VPLS in order to forward customer STP BPDUs transparently?

What is the default Spanning Tree protocol used in a VPLS on the Alcatel-Lucent 7750 SR?

Which of the following SAP encapsulations supports only one service on a port?

You are providing a customer two VPLS services in two different Metro networks. VPLS 500 has been configured in Metro 1 and VPLS 900 has been configured in Metro 2. The customer ha...

Five VPLS services have been configured between two PE routers. What is the minimum amount of SDPs that must be configured?

Which of the following is NOT a feature of the IEEE 802.3ah EFM standard?

What of the following is a key benefit of Active/Standby pseudowires?

Click on the exhibit below. Which ports will become root ports? (Choose 3)

Click on the exhibit below. Given the following configuration, which service type will VPLS 1 and VPLS 100 be displayed as with the "show service service-using" command?

Click on the exhibit below. Study the network diagram. Which of the following configurations is correct for user VPLS 100 on PE4?

Click on the exhibit below. You have been requested to add load balancing across the redundant spoke-SDPs in the network shown. What further configuration is required? (Choose 2)

Which of the following is a function of the data plane that must be considered when provisioning a VPLS service?

Click on the exhibit below. The service MTU on PE-A is 1514 bytes and the service MTU on PE-C is 1518 bytes. What is the status of the mesh-sdp between PE-A and PE-C?

Why should you configure send-flush-on failure on your PE routers when using active/standby pseudowires?

Click on the exhibit below. Management VPLS 100 has been created for redundant spoke-SDP connections. User VPLSs 10 and 20 are using the same spoke-SDPs that are being managed by V...

RSTP blocks a spoke-sdp using a management VPLS. Is traffic affected on an ES using the same transport SDP?

Click on the exhibit below. Given the following output what is the most likely reason the SDP binding is operationally down? (Choose 2)

Which of the following functions must a PE router support when participating in a VPLS service? (Choose 3)

A customer has requested a VPLS service. The customer is using dot1q encapsulation and they have requested that all vlan tags be transparently passed. Which two SAP IDs will accept...

What is the MTU impact on the SDP path-mtu if fast reroute, one-to-one mode is implemented on the LSP?

Click on the exhibit below. In the following diagram, traffic ingressing on SAP 1/2/3:1 will be passed to the layer-2 DPI device for inspection based on a filter policy applied to...

To reduce the amount of flooding between PE devices which of the following steps shouldbetaken?

What configuration is required on the CE device when using MC-LAG?

How is it possible for multiple services to be carried over the same MPLS LSPs?

Which of the following statements about Spanning Tree Protocol is true?

Which service component in the data plane uniquely identifies a VPLS to the far end PE node?

Click on the exhibit below. Assuming there is a full mesh of mesh-SDPs between the PEs within each metro network and a spoke-SDP between PE-C of Metro A and PE-B of Metro B. how is...

H-VPLS solves the data-plane and control-plane problems with the exception of one issue. What is the concern that H-VPLS does not solve?

How many designated ports are there in a spanning tree topology?

Which of the following OAM tools can be used as a VPLS topology discovery mechanism (Choose 2)?