4A0-105 Practice Exam Questions with Answers Nokia Virtual Private LAN Services Certification

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

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

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

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

Ring topologies.

Metro-to-metro topologies

H-VPLS topologies.

Partial-mesh topologies.

There will be no impact on the path-mtu.

The path-mtu will decrease by4 bytes.

The path-mtu will increase by 4 bytes.

The path-mtu will decrease by 8 bytes.

The path-mtu will increase by 8 bytes.

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

Putting a port in loopback does not affect customer data flow

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

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

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

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

Unlike VPLS. VPWS appears as a multi-hop network to the customers.

Unlike VPLS, VPWS allows CEs that are member of the same service instance to communicate with each other as if they are connected via a bridged LAN.

Unlike VPWS, VPLS allows customers to view the network as a routed network.

Unlike VPWS, VPLS is a service where customer MAC addresses are learned.

PE-A will require a SAP id of "sap 1/1/1:200" and PE-B will require a SAP id of "sap 1/1/1:300.

PE-A will require a SAP id of "sap 1/1/1" and PE-B will require a SAP id of "sap 1/1/1".

PE-A will require a SAP id of "sap 1/1/1:0" and PE-B will require a SAP id of "sap 1/1/1:0".

PE-A will require a SAP id of "sap 1/1/1:*" and PE-B will require a SAP id of "sap 1/1/1:*".

H-VPLS

IEEE 802.lag

MAC aggregation

MAC-in-MAC

A management VPLS carries customer traffic over the non-blocking spoke-SDP

A VPLS service must be defined as a management VPLS upon creation to take on the role of a management VPLS

The state of a spoke-SDP within a user VPLS will take on the state of the spoke-sdp within the management VPLS.

The management VPLS must be created before the user VPLS.

The frame is dropped.

The frame is always flooded

The frame is forwarded and MAC learning is automatically disabled.

The frame is discarded if the destination is unknown.

More information is required to determine the fate of this new frame.

If the MAC address of this new client device does not reach the upper limit of the configured total number of MAC addresses allowed in the VPLS forwarding database, then the new MAC address will be stored.

The new source MAC addresses will not be entered in the VPLS service forwarding database.

New local source MAC addresses will not be entered in the VPLS service forwarding database, but new remote MAC addresses would continue to be entered.

New remote source MAC addresses will not be entered in the VPLS services forwarding database, but new local MAC addresses would continue to be entered.

ports must be on the same MDA

ports must have the same speed and duplex settings

auto negotiation must be on

auto negotiation must be off or limited

port must be in access mode only

LDP must be enabled.

RSVP must be enabled.

An SDP must be configured on the far-end.

Service MTU must match.

SDP ID must match.

The frame will be forwarded out the port associated with the DA.

The frame will be discarded.

The frame will be flooded to all ports.

The frame will be fragmented and forwarded out the port associated with the DA.

9100

9104

9108

9122

9126

TRUE

FALSE

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

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

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.

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

Processing the TTL takes extra time.

MAC learning rate is doubled.

FDB size is doubled.

Requires a protocol to remove loops.

oam mac-populate

oam mac-ping

oam mac-trace

oam svc-ping

oam cpe-ping

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

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

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

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

show stp 10

show service vpls 1 stp

C, show service id 10 stp

show service id 1 stp or show service id 2 stp

Set the bridge priority to 131071.

Set the bridge priority to 0.

Set the bridge priority to 32768.

Leave the bridge priority as the default.

Increases scalability

Reduces the FDB size within a VPLS instance

Reduces replication and bandwidth utilization from the MDU device to the core network

Easier to manage

Reduces the routing table size

A single management VPLS using RSTP can be used to block different SDPs for different VPLS services.

A single management VPLS using 802.1D-2004 can be used to block different SDPs for different VPLS services

There is no way to have load balancing across redundant spoke-SDPs.

Two management VPLS using RSTP can be used to block different SDPs for different VPLS services.

The port that the SAP belongs to must have the correct ether type configured.

The SAP must be configured with the right VLAN tag.

The SDP VC type must be configured as type VLAN and the correct vlan-vc-tag must be specified.

All of the above.

Spanning-tree BPDUs are returned to the sender.

The MEP sees its own CFM frames returned to itself.

This is not a function of IEEE 802.lag but of 802.1D

The record field of the CFM frame keeps track of chassis-mac addresses.

TRUE

FALSE

Only R4 will be reachable through the VPLS.

B All devices will be reachable through the VPLS.

R4 and R3 will remain reachable.

No devices will be reachable.

The l-TAG in the l-SID is inspected to determine where the frame should be delivered.

When the B-MAC header is stripped the customer MAC address is then looked up in the FDB

The l-SID in the l-TAG is inspected to determine where the frame should be delivered.

The PE inspects the service label in the MPLS header before stripping the B-MAC header.

On the PE the endpoint has been configured with "supress-standby-signalling"

On the PE the endpoint has been configured with "no supress-standby-signalling"

On the MDU the endpoint has been configured with "supress-standby-signalling"

On the MDU the endpoint has been configured with "no supress-standby-signalling1

MSTP

MCLAG

LACP

DHCP

A proprietary protocol

TRUE

FALSE

There will be no impact on the path-mtu.

The path-mtu will decrease by4 bytes.

The path-mtu will increase by 4 bytes.

The path-mtu will decrease by 8 bytes.

The path-mtu will increase by 8 bytes.

The switch with the lowest priority becomes the root.

The switch with the highest priority becomes the root.

The switch with the lowest MAC address always becomes the root.

The switch with the highest MAC address always becomes the root.

MEP

MAP

MIP

MUP

Mesh-sdp

Spoke-sdp

MPLS

GRE

As frames leave the switch, the DA is populated into the FDB.

As frames enter the switch, the DA is populated into the FDB.

As frames leave the switch, the SA is populated into the FDB.

As frames enter the switch, the SA is populated into the FDB.

VPLS 1 will be displayed as mVPLS and VPLS 100 will be displayed as VPLS.

VPLS 1 will be displayed as mVPLS and VPLS 100 will be displayed as uVPLS

VPLS 1 will be displayed as VPLS and VPLS 100 will be displayed as VPLS.

VPLS 1 will displayed VPLS and VPLS 100 will be displayed as uVPLS.

The same as the number of alternate ports in the topology

1 per segment

The same as the number of root ports

1 per switch

The mesh-sdp will be up.

The mesh-sdp will be down.

The mesh-sdp will only be up on PE-A.

The mesh-sdp will only be up on PE-C.

Number of LSPs.

Number of TLDP sessions.

Number of SDPs.

MAC address consumption in the FDB.

Bandwidth and replication requirements.

The device will try to force the other side up using the evaluating flag in the PDU.

The device will wait for the trasmit-interval of 5 before trying to rediscover the neighbor.

The device will detect the port change and will wait for normal operation mode.

The device will detect the port change and revert to discovery mode.