4A0-100 Nokia Scalable IP Networks Questions and Answers

The Data Link Layer is responsible for encapsulating the packet into a frame for transmission on the transmission media.

The Data Link Layer is responsible for encapsulating the packet into an IP header and routing the packet.

The Data Link Layer is responsible for formatting the packet for applications such as JPEG format.

The Data Link Layer is responsible for timing of the signals on the transmission media

A passive device simply used to connect two or more cables. It does not generate or amplify any signals.

A device that receives and retransmits a signal out its ports but does not do any Layer 2 analysis of the data.

A device that receives a signal and based on the Layer 2 destination address, makes a decision on which ports the signal should be retransmitted.

A device that receives a signal and based on the Layer 3 destination address makes a decision on which ports the signal should be retransmitted.

65001

65003

2002

All of the above.

None of the above.

True

False

TTL

ACK

FIN

SYN

Building routing tables using dynamic routing protocols.

Building forwarding tables for the IOMs.

Handling router configuration and management functions.

Processing and forwarding user application traffic.

On the CE device.

On the PE device.

On the P device.

On both CE and PE devices.

Broadcast storms caused by redundancy in Layer 2 networks.

Missing protocol field in the Ethernet header.

Missing sequence number in the Ethernet header.

Unreliable data transfer in Layer 2 networks.

The router does a longest prefix match lookup.

The router checks the source address in the MAC FDB.

The router assigns a cost to each of its interfaces.

The router advertises routes to its neighbors.

Source and destination MAC addresses

Source and destination IP addresses

Source and destination port numbers

Source and destination email addresses

An IP filter is used to discard packets with checksum errors.

An IP filter can allow IP packets into a network or deny IP packets from entering a network.

Multiple ingress and egress filter policies can be applied to a network interface.

Once an IP filter is applied, it cannot be modified.

There is no broadcast address on the network.

The address is only used as a loopback address.

This specifies a single host address.

The address is only used for router IDs.

10.10.10.0

10.10.10.1

10.10.10.2

10.10.10.3

A device used to connect cables with signal amplification.

A device that receives and replicates data without Layer 2 header inspection.

A device that receives and forwards data based on the MAC destination address.

A device that receives and forwards data based on the Layer 3 destination address.

Router R1 pushes labels for both LSP A and LSP B.

Router R4 pushes labels for both LSP A and LSP B.

Router R1 pushes labels for LSP A, while router R4 pushes labels for LSP B.

Router R4 pushes labels for LSP A, while router R1 pushes labels for LSP B.

Routers send a copy of their entire routing table to their neighbors.

Routers send frequent periodic updates to the entire network.

Routers know the entire network topology.

Routers use hop-count to calculate their routing tables.

Subnetting adds a layer of hierarchy in the addressing structure.

Subnetting helps routers make faster forwarding decisions.

Subnetting increases routing advertisement stability.

Subnetting reduces the number of route entries advertised by the router.

Router R3 is the iLER for LSP B.

Router R3 is the eLER for LSP A.

Router R is an LSR for both LSP A and LSP B.

Router R3 is LSR for LSP A and an LER for LSP B.

It is used as a L3 broadcast address.

It is a logical interface address.

It can have any prefix value.

It is used for layer-2 forwarding.

Tier 1 and Tier 2 ISPs

Tier 1 and Tier 3 ISPs

Tier 2 and Tier 3 ISPs

Tier 3 ISP

It is used when forwarding control plane data to the local CPM.

It is used when there is no other known route for a given packet’s destination.

It matches a specific /32 host address with the least cost to the destination.

It is used when forwarding multicast and broadcast packets.

To establish reliable communication for the application services layer.

To provide low overhead communication for the application services layer.

To route IP packets for the application services layer.

To transmit packets over the physical infrastructure.

System interface

Interface “toC1”

Interface “toP1”

Interface “toP2”

RSVP-TE

CSPF

PNNI

LDP

The CE device removes the MPLS label.

The last LSR on the LSP removes the MPLS label.

MPLS labels are not removed until they reach the final destination.

The egress LER removes the MPLS label.

Customer traffic is encapsulated with a service label by the ingress PE. The service label identifies which transport tunnel to use.

Customer traffic is encapsulated with a service label by the egress PE. The service label identifies which transport tunnel to use.

Customer traffic is encapsulated with a service label by the egress PE. The service label identifies the specific service the data belongs to.

Customer traffic is encapsulated with a service label by the ingress PE. The service label identifies the specific service the data belongs to.

Based on the metrics of the routing protocol, find the best path to the destination network and install it in the routing table.

Provide a CLI interface to allow the operator to configure the dynamic routing protocol on the router.

Based on the routing protocol preference values, chose the route with the lowest preference and install it in the routing table.

Provide a CLI interface to allow the network operator to install static routes in the routing table.

OSPF

BGP

X.500

IS-IS

Ethernet

An autonomous system is a network or group of networks operating under one administrative authority.

An autonomous system is another term for the collection of routers that make up the Internet

An autonomous system is a network or group of networks from many organizations running different IGP routing protocols, but all running BGP.

An autonomous system is a loosely defined term that can refer to any organization that has a connection to the Internet.

You cannot have overlapping IP addresses. The service provider must ensure that its customers are all using discrete IP address space.

Each VPRN service maintains a separate VPN routing and forwarding instance to separate customer routing information.

A VPRN will ignore IP addressing information and use MAC addressing instead which are always unique.

A VPRN will translate customer IP addresses to a private addressing scheme administered by the service provider.

True

False

R7 silently discards the LSA received from R8.

R7 installs the LSA received from R8 in its link state database and floods a copy to its neighbors.

R7 discards the LSA received from R8 and sends an ACK to R8.

R7 installs the LSA received from R8 in its link state database, sends an ACK to R8 and floods a copy to its neighbors.

CE always connects to a PE router.

CE always connects to a P router.

CE always connects to another CE device.

The CE does not connect to the service provider network.

0.0.0.0/0 next-hop 10.2 3.2

0.0.0.0/32 next-hop 10.2.3.2

10.2.3.2/32 next-hop 0.0.0.0/0

0.0.0.0/0 next-hop 192.168.2.0

LDP monitors the available bandwidth on all links and signals the LSP based on this information.

LDP uses the shortest hop-count between two endpoints for the LSP.

LDP must be configured hop-by-hop by the service provider.

LDP follows the path chosen by the IGP.

TRUE

FALSE

Network Solutions INC

IANA

IETF

ITU-T

IEEE

10 Mb/s Ethernet.

100 Mb/s Ethernet.

1000 Mb/s Ethernet .

There are copper and optical versions possible for all of these Ethernet data rates.

Graphic User Interface (GUI).

Node Management Terminal Interface (NMTI).

Command Line Interface (CLI).

All of the above.

VLAN tag.

IP Header.

FCS.

Priority Value.

Segmenting

Stacking

Routing

Tagging

9 broadcast domains, 3 collision domains.

3 broadcast domains, 3 collision domains.

3 broadcast domains, 9 collision domains.

1 broadcast domain, 9 collision domains.

A physical interface address.

A logical address on the router not corresponding to any specific interface.

May have any prefix value.

A management IP address.

Controls distribution of IP addresses.

Simplifies protocol functionality.

Isolates changes in lower layers from upper layers.

Increases protocol operational efficiencies.

Layering adds to the fragmentation of the data

STM-1 with a bit rate of 1.544 Mbit/s

STM-1 with a bit rate of 2.048 Mbit/s

STM-1 with a bit rate of 51.84 Mbit/s

STM-1 with a bit rate of 155.52 Mbit/s

Allowing a contiguous block of network addresses to be represented by one network prefix.

Increasing the number of addresses in the routing table.

Summarizing addresses in the network into smaller routing tables.

Not advertising directly connected routes.

POS

IP

ATM

Frame Relay

Ethernet

A VLAN allows multiple Ethernet switches to be connected in a single broadcast domain.

A VLAN allows multiple Ethernet switches to be connected in a single collision domain.

A VLAN can separate ports on the same switch into different broadcast domains.

A VLAN can separate ports on the same switch into different collision domains.

It records the destination MAC address and the interface on which it arrived.

It records the source MAC address and the interface on which it arrived.

It floods the frame out of all its interfaces except the interface on which the frame arrived.

It transmits the frame out of the appropriate interface.