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Viewing questions 76-90 out of questions
Questions # 76:

Click on the exhibit below.

Question # 76

A new site is added to PE-D of Metro B. Which of the following statement below is true?

Options:
A.

If a spoke-SDP is configured between the new site and PE-D no further SDPs will be required.

B.

If a mesh- SDP is configured between the new site and PE-D no further SDPs will be required.

C.

A mesh- SDP must be configured between the new site and all other PEs within Metro B.

D.

A spoke- SDP must be configured between the new site and all other PEs within Metro B.

Questions # 77:

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

Options:
A.

The loopback control PDU instructs the remote port to enter loopback mode.

B.

Putting a port in loopback does not affect customer data flow

C.

Both ports must rediscover the OAM capabilities of each other once the port is put back into service.

D.

Both ports must still send Information PDUs to avoid going back to discovery mode.

E.

When a port is in loopback mode, service mirroring will still work if it is a mirror-source or mirror-destination.

F.

All packets, except for information PDUs, are looped back.

Questions # 78:

What is the default service-mtu for a VPLS service?

Options:
A.

1500

B.

1514

C.

1518

D.

It depends on the access port MTU.

E.

It depends on the network port MTU.

Questions # 79:

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

Options:
A.

The CE must be configured with an MC-LAG to both PE devices.

B.

The CE must be configured with LACP in active mode.

C.

There is no configuration required on the CE.

D.

The CE must be an Alcatel-Lucent 7750 SR.

Questions # 80:

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

Options:
A.

It flushes the local FDB speeding recovery

B.

It discards all packets in the queue and sends icmp-discad messages to the sender. The packets are re-transmitted resulting in no loss of data.

C.

On failure, the PE sends an LDP flush-all-from-me message to all PE devices in the VPLS. This speeds convergence to the new topology.

D.

It is not important to use send-flush-on-failure as Active/Standby signalling automatically converges the FDB in all VPLS instances

Questions # 81:

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

Options:
A.

For the switches that are non-root or designated switches, the port with the highest combined cost to the root is the root port.

B.

In the case where two switches have the same priority, the switch with the lowest MAC address becomes the root.

C.

The switch port that is the greatest distance from the LAN to the root is the designated port.

D.

All of the above.

Questions # 82:

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

Options:
A.

Multicast frames only forward out ports that have a known receiver.

B.

Unicast frames only forward out ports that have a known receiver.

C.

If the FDB is empty, unicast and multicast frames are treated equally.

D.

If the FDB has an entry for the unicast frame, both unicastand multicast are treated equally.

Questions # 83:

What is PBB also known as?

Options:
A.

H-VPLS

B.

IEEE 802.lag

C.

MAC aggregation

D.

MAC-in-MAC

Questions # 84:

Which protocol is used to signal the status of the active links between the PE and the CE in MC-LAG?

Options:
A.

MSTP

B.

MCLAG

C.

LACP

D.

DHCP

E.

A proprietary protocol

Questions # 85:

In Active/Standby pseudowires a failed pseudowire has recovered. Under what circumstances will the active pseudowire revert to the previously failed link?

Options:
A.

It will always revert to the previously failed link.

B.

It will never revert to the previously failed link.

C.

It will revert if the precedence of the previously failed link is set to 0 or "primary".

D.

It will revert if the precedence of the previously failed link is lower than the currently active link

Questions # 86:

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

Options:
A.

The vc-id is signaled in the control plane.

B.

The vc-id is part of the data plane encapsulation.

C.

There is a vc-id to vc-label mapping.

D.

The vc-id has point to point significance.

Questions # 87:

Click on the exhibit below.

Question # 87

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 down and SAP 1 transitions to the forwarding state? Select the most accurate statement.

Options:
A.

A Spanning Tree BPDU will be sent across the mesh flushing the FDB table in all devices participating in the VPLS instance.

B.

Stale information will be used within the VPLS instance to forward traffic until the FDB ages out.

C.

An LDP control message will be sent to all devices in the mesh participating in the VPLS instance. Only MAC addresses associated with the PE that the failure occurred on will be flushed.

D.

An LDP control message will be sent to all devices in the mesh participating in the VPLS instance. The entire FDB in the VPLS instance will be flushed.

Questions # 88:

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

Options:
A.

Number of LSPs.

B.

Number of TLDP sessions.

C.

Number of SDPs.

D.

MAC address consumption in the FDB.

E.

Bandwidth and replication requirements.

Questions # 89:

During the process of troubleshooting a VPLS problem the "oam mac-purge" command with "register" option was used to purge a MAC address from the FDB. Which of the following statements is true?

Options:
A.

Relearning of the MAC address that was purged can only be done once customer traffic resumes.

B.

Relearning of the MAC address that was purged can only be done with the "oam mac-populate" command.

C.

Customer traffic destined to the MAC address that was purged will be dropped until the MAC address is relearned with the "oam mac-populate" command.

D.

Relearning of the MAC address that was purged can only be done with the "oam mac-register" command.

Questions # 90:

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

Options:
A.

TRUE

B.

FALSE

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Viewing questions 76-90 out of questions