4A0-C04 Practice Exam Questions and Answers

A.  

The TC field is set based on the value of the DSCP field inside the customer packet.

B.  

The TC field is set to a specific value via explicit administrative configuration.

C.  

The TC field is set to a system generated random number.

D.  

The TC field is set by the eLER.

A.  

The router with the lowest priority is the DR.

B.  

The router with the highest priority is the DR.

C.  

If priorities are the same, the DR is chosen based on the lowest RI

D.  

D.  

If priorities are the same, the DR is chosen based on the highest RI

D.  

A.  

The term backbone router has the same definition as the term area border router.

B.  

An OSPF network needs at least one area border router to function.

C.  

Area border routers connect the backbone area to other areas in an OSPF network.

D.  

By definition, an area border router must perform route summarization between areas.

A.  

They are multicast to the All Hosts address.

B.  

They are broadcast to the subnet broadcast address.

C.  

They are multicast to the All Routers address.

D.  

They are broadcast or multicast, depending on the physical media.

A.  

The inner label is the IPv4 Explicit Null. The outer label is the MPLS transport label,

B.  

The inner label is an MPLS transport label. The outer label is the IPv4 Explicit Null.

C.  

The inner label is the IPv6 Explicit Null. The outer label is an MPLS transport label.

D.  

The inner label is an MPLS transport label. The outer label is the IPv6 Explicit Null.

A.  

The router must receive an acknowledgment

B.  

The router must receive a Hello

C.  

The router must receive a new sequence number

D.  

The router must receive a Link State Packet

A.  

RIPv2 supports basic and MD5 authentication only.

B.  

RIPv2 supports password and MD5 authentication only.

C.  

RIPv2 does not support authentication, password and MD5 authentication.

D.  

RIPv2 does not support authentication.

A.  

When a Link State Update is received in response to a Link State Request

B.  

When a router receives a Hello packet from a neighbor that contains its router id in the neighbor list

C.  

When OSPF neighbors exchange Database Descriptor packets

D.  

When a Link State Acknowledgement is received in response to a Link State Update

A.  

Option A

B.  

Option B

C.  

Option C

D.  

Option D

A.  

OSPF

B.  

RIP

C.  

BGP

D.  

IS-IS

A.  

Area ID

B.  

Hello and Dead Intervals

C.  

Stub flag

D.  

DR and BDR addresses

E.  

The list of neighbors

A.  

Well-known mandatory

B.  

Well-known discretionary

C.  

Optional transitive

D.  

Optional non-transitive

A.  

224.0.0.5

B.  

224.0.0.6

C.  

The unicast IP address of the interface the update is being sent on.

D.  

The system address of the router

A.  

'asbr' is missing from router R1's configuration.

B.  

Router R1 needs to have an export policy added to it.

C.  

Router R5 does not have an export policy for these prefixes.

D.  

Router R1 needs to have an import policy added to it.

A.  

PE-1 requires T-LDP sessions to both ABR-1 and ABR-2.

B.  

PE-1 requires a full mesh of RSVP-TE LSPs to all routers in area 1.

C.  

ABR-1 requires T-LDP sessions to all ABRs in area 0.

D.  

PE-1 requires fast reroute enabled on all RSVP-TE LSPs.

A.  

The service is a local service.

B.  

The service requires a second spoke SDP on this router.

C.  

The service's VC ID is 44.

D.  

The service will accept VLAN tag 100.

A.  

Traffic engineering information is carried in the extended TLVs.

B.  

Traffic engineering must be enabled on all IP/MPLS routers along the LSP path.

C.  

Traffic engineering information is stored in the opaque database,

D.  

Traffic engineering is required for constraint-based LSPs.

A.  

Secondary_Path-1

B.  

Secondary_Path-2

C.  

Secondary_Path-3

D.  

Secondary_Path-4

A.  

Option A

B.  

Option B

C.  

Option C

D.  

Option D

A.  

65206 65202 65100

B.  

(65206 65202)65100

C.  

(65204 65206 65202) 65100

D.  

(65200) 65100

A.  

The time router R2 takes to receive a PATH Error message from router R4.

B.  

The time router R2 takes to find out a number of RSVP Hello messages have been missed.

C.  

The time router R2 takes to send a PATH Tear message to the head-end router.

D.  

The time router R2 takes to receive a PATH message from router R4 after a PATH refresh interval.

A.  

Not so stubby areas

B.  

Level1 area WC

C.  

Stub areas

D.  

Partially stubby areas

E.  

Level 2 areas

A.  

show router ospf opaque-database

B.  

show router ospf database

C.  

show router ospf opaque-Isa

D.  

show router ospf te opaque

A.  

Send a PATH Tear message toward router R6.

B.  

Send a PATH Tear message toward router R1.

C.  

Send a PATH Error message toward router R6.

D.  

Send a PATH Error message toward router R1.

A.  

Well-known mandatory.

B.  

Well-known discretionary.

C.  

Optional transitive.

D.  

Optional non-transitive.

A.  

With the same method and attribute as 16-bit AS numbers.

B.  

With the same method as 16-bit AS numbers, but using the AS4_Aggregator attribute.

C.  

Aggregation is not yet supported with 32-bit AS numbers.

D.  

By using a dummy value of 23456 in the 16-bit AS aggregator field. This value lets the router know it needs to read the 32-bit AS number that is contained in the nextTLV.

A.  

The adjacency state is two way because both routers have received a database description packet.

B.  

The adjacency is in the exchange state. The next step is to exchange link state request and link state update packets.

C.  

The adjacency is in the ex start state. The routers have exchanged database description packets, but still have to negotiate the starting sequence number.

D.  

The adjacency state is full. The routers are exchanging database description packets to notify each other that all link state advertisements have been received.

A.  

Label

B.  

Frame check sequence

C.  

Traffic Class (previously called Experimental)

D.  

Time To live

E.  

Bottom of stack bit

A.  

Sdp-ping

B.  

Isp-ping

C.  

Svc-ping

D.  

Sdp-mtu

A.  

Tunnel Label

B.  

VC Label

C.  

Operational Control Word

D.  

UNI

E.  

NNI

A.  

Both neighbors R1and R2 should be part of AS 65540.

B.  

Neighbor R1should be part of AS 65550, while neighbor R2 should be part of AS 65540.

C.  

Neighbor R1should be part of AS 65550, while neighbor R2 should be part of AS 65560.

D.  

Both neighbors R1and R2 should be part of AS 65560.

A.  

Fast reroute capability

B.  

Control traffic prioritization

C.  

Route redistribution

D.  

Traffic engineering extensions

E.  

Cut through forwarding

A.  

All routers along the path, R1, R2, and R3 can be PLRs.

B.  

If the R1-R2 link fails, router R4 becomes an MP.

C.  

If the R2-R3 link fails, router R3 becomes a PLR.

D.  

Router R1 is the LSP head-end and can be a PLR.

A.  

Assign an admin group to a MPLS interface.

B.  

Configure CSPF on the LSP.

C.  

Configure at least one strict hop on the LSP path.

D.  

Configure an "include" or "exclude" statement on the LSP path.

A.  

30 second network updates

B.  

Classless routing

C.  

Broadcast advertisement

D.  

Poison Reverse

A.  

Label values may be dynamically assigned by LDP.

B.  

Label values may be dynamically assigned by RSVP-T

E.  

C.  

Label values may be reserved for special uses.

D.  

Label values may be dynamically assigned by IGP.

A.  

Enabling VPNs

B.  

Enabling traffic engineering

C.  

Enabling network security

D.  

Enhancing network resiliency

A.  

The path must include at least one hop.

B.  

The path may be used for multiple LSPs.

C.  

The path may be used multiple times in a single LSP.

D.  

The path must define a tunnel destination IP address.

A.  

Router R1 generates a Type 4 LSA that is flooded to areas 0, 1, and 2.

B.  

Router R3 generates a Type 4 LSA that is flooded to areas 0, 1, and 2.

C.  

Router R3 generates a Type 4 LSA that is flooded to areas 0 and 2.

D.  

Router R3 generates a Type 4 LSA that is flooded to area 0, and router R6 generates a Type 4 LSA that is flooded to area 2.

A.  

Hop count and 16

B.  

Hop count and 15

C.  

Link cost and 15

D.  

Link cost and 16

A.  

An SDP is not required for a local service.

B.  

A single SDP can carry different types of services.

C.  

An SDP can simultaneously support GRE and MPLS encapsulation.

D.  

An SDP can use the system IP address to indicate the far-end router.

A.  

Conservative label retention

B.  

Liberal label retention

C.  

Downstream on demand

D.  

Downstream unsolicited

A.  

Not So Stubby Areas

B.  

Level 1 Areas

C.  

Stub Areas

D.  

Partially Stubby Areas

A.  

Source IP address

B.  

TCP source port

C.  

Prefix list

D.  

Protocol type