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SRC Certification
4A0-C02
Nokia SRA Composite Exam Questions and Answers

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Viewing page 4 out of 13 pages

Viewing questions 46-60 out of questions

Questions # 46:

Which of the following about inter-AS model B VPRN is FALSE?

Options:

Model B does not require the configuration of VPRN instances on ASBRs.

The ASBRs peer with each other to transport VPN-IPv4 routes between autonomous systems.

PE routers distribute VPN-IPv4 routes to their local ASBR.

One single ASBR is required in each AS to hold the routes for all VPRNs.

Answer

Questions # 47:

Click the exhibit.

Question # 47

The policy shown is configured on an Alcatel-Lucent 7750 SR to implement an extranet VPRN between the main sites of two separate VPRNs. Route target "target:65100:2" is used for Customer 1 routes, and route target "target:65100:3" is used for Extranet routes. How should this policy be applied?

Options:

The policy should be applied as an import policy on the PE connected to the main site of Customer 1.

The policy should be applied as an import policy on all the PEs connected to the sites of Customer 1.

The policy should be applied as an export policy on the PE connected to the main site of Customer 1.

The policy should be applied as an export policy on all the PEs connected to the sites of Customer 1.

Answer

Questions # 48:

In a VPRN that uses MPLS transport tunnels, which of the following statements about P devices is TRUE?

Options:

P devices participate in service provider core routing.

P devices are not required to be MPLS-enabled.

P devices must be aware of the VPRNs.

P devices must support MP-BGP.

Answer

Questions # 49:

Port 1/1/1 has been configured as an access port with QinQ encapsulation. Which of the following three statements are true for ingress traffic assuming default configuration? (Choose 3)

Options:

sap 1/1/1:*.0 is a valid sap id.

sap 1/1/1:100* will accept frames with a single tag of 100.

sap 1/1/1:200* will strip the top tag of 200 and the bottom tag will be transparently passed.

sap 1/1/1:0* will accept all untagged frames.

sap 1/1/1:0* will accept any tagged frames.

Answer

B, C, D

Questions # 50:

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

Options:

TRUE

FALSE

Answer

Questions # 51:

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

Options:

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.

Answer

Questions # 52:

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

Options:

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.

Answer

A, D, F

Questions # 53:

Click on the exhibit below.

Question # 53

Which port will become the alternate port?

Options:

Bridge B 1/1/3

Bridge B 1/1/2

Bridge C 1/1/2

Bridge C 2/1/1

Bridge D 1/1/1

Bridge D 1/1/3

Bridge E 1/1/1

Answer

Questions # 54:

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

Options:

It flushes the local FDB speeding recovery

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.

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.

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

Answer

Questions # 55:

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

Options:

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.

Answer

Questions # 56:

If the max remote-age timer of a B-VPLS is reached, what happens to the remotely learned MAC addresses in the l-VPLS service?

Options:

There is no effect. The MAC addresses for the l-VPLS age out independently of the aging of B-VPLS addresses.

The MAC addresses for the l-VPLS will age out immediately following the remote-age out of the backbone-macs of the B-VPLS.

By default, the remote-age timer of the B-VPLS is configured to 0 and addresses do not age out. The l-VPLS uses its own timer.

The same timer is used for B-VPLS and l-VPLS addresses on the node.

Answer

Questions # 57:

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?