WAN chapter 4

A network engineer has issued the interface serial 0/0/1.102 point-to-point command on a router that will be communicating with another router over a Frame Relay virtual circuit that is identified by the DLCI 102. Which two commands would be appropriate for the network engineer to issue next? (Choose two.)

ip address 10.1.1.10 255.255.255.252

encapsulation frame relay

frame-relay interface-dlci 102

no ip address

no shutdown

ip address 10.1.1.10 255.255.255.252

frame-relay interface-dlci 102

What are the two major criteria that constitute the cost of a Frame Relay circuit? (Choose two.)

local loop

required bandwidth

end-to-end connectivity

circuit management fees

QoS

local loop

required bandwidth

Which three notification mechanisms are used when congestion is present in a Frame Relay network? (Choose three.)

DE

BECN

CIR

FECN

DLCI

inverse ARP

DE

BECN

FECN

Fill in the blank.
The encapsulation frame-relay
____________
command enables Frame Relay encapsulation and allows connection to a device from a different vendor.
ietf
A router interface connects to a Frame Relay network over a preconfigured logical circuit that does not have a direct electrical connection from end to end. Which type of circuit is being used?

SVC

dedicated leased line

hub and spoke

full mesh

PVC

PVC
Which technology allows a Layer 3 IPv4 address to be dynamically obtained from a Layer 2 DLCI?

Inverse Address Resolution Protocol

Neighbor Discovery

Inverse Neighbor Discovery

Address Resolution Protocol

Inverse Address Resolution Protocol
A network administrator of a large organization is designing a Frame Relay network. The organization needs redundancy between some key sites but not all. What WAN topology should the administrator choose to meet their needs?

star

extended star

full mesh

partial mesh

partial mesh
Why would a customer request a Frame Relay circuit with a CIR of zero?

to have better QoS

to have a circuit used for network management traffic

to have a circuit used for voice traffic

to have a backup circuit for critical data transmissions

to have a link with reduced costs

to have a link with reduced costs
The show frame-relay pvc command is best utilized to display the number for which type of packets that are received by the router?

Inverse Neighbor Discovery messages

LMI status messages

Inverse ARP messages

FECN and BECN messages

FECN and BECN messages
Which two Frame Relay router reachability issues are resolved by configuring logical subinterfaces? (Choose two.)

Frame Relay is unable to map a remote IP address to a DLCI.

Inverse ARP fails to associate all IP addresses to the correct DLCIs.

Link-state routing protocols are unable to complete neighbor discovery.

LMI status inquiry messages sent to the network are not received.

Distance vector routing protocols are unable to forward routing updates back out the incoming interface to other remote routers.

Link-state routing protocols are unable to complete neighbor discovery.

Distance vector routing protocols are unable to forward routing updates back out the incoming interface to other remote routers.

Which three actions can be taken to solve Layer 3 routing protocol router reachability issues when using Frame Relay? (Choose three.)

Disable Inverse ARP.

Use a full mesh topology.

Configure static DLCI mappings.

Use the keyword cisco as the LMI type.

Use subinterfaces.

Disable split horizon.

Use a full mesh topology.

Use subinterfaces.

Disable split horizon.

Fill in the blank. Use an acronym.
The Frame Relay
_________________
identifies a connection from one endpoint to a remote destination.
dlci
A network administrator has statically configured the LMI type on the interface of a Cisco router that is running Cisco IOS Release 11.2. If the service provider modifies its own LMI type in the future, what step must the network administrator take?

The network administrator must statically set the LMI type to be compatible with the service provider.

The network administrator does not have to do anything, because all LMI types are compatible with one another.

The network administrator must modify the keepalive time interval to maintain connectivity with the LMI type of the service provider.

The network administrator simply has to verify connectivity with the provider, because the router has an LMI autosensing feature that automatically detects the LMI type.

The network administrator must statically set the LMI type to be compatible with the service provider.
What is an advantage of Frame Relay WAN technology compared with leased lines?

It supports both voice and data traffic.

It uses one interface to connect to several remote sites.

It offers a guaranteed direct electrical circuit from end to end.

It provides permanent dedicated capacity to the customers.

It uses one interface to connect to several remote sites.
Which two functions are provided by the Local Management Interface (LMI) that is used in Frame Relay networks? (Choose two.)

error notification

mapping of DLCIs to network addresses

congestion notification

exchange of information about the status of virtual circuits

simple flow control

exchange of information about the status of virtual circuits

simple flow control

When would the multipoint keyword be used in Frame Relay PVCs configuration?

when using physical interfaces

when multicasts must be supported

when participating routers are in the same subnet

when global DLCIs are in use

when participating routers are in the same subnet
A network administrator uses the following command to configure a Frame Relay connection on a router towards the service provider:

R1(config-if)# frame-relay map ip 209.165.200.225 102 broadcast

What is the purpose of using the broadcast keyword?

to support dynamic routing protocol updates across the link

to support IP address to MAC address resolution for the interface in the service provider site

to enable VoIP packet transmission across the link

to enable dynamic IP address-to-DLCI mapping

to support dynamic routing protocol updates across the link
21.Refer to the exhibit. A network administrator issues the show frame-relay map command to troubleshoot the Frame Relay connection problem. Based on the output, what is the possible cause of the problem?

The S0/0/1 interface of the R2 router is down.

The S0/0/1 interface of the R2 router has been configured with the encapsulation frame relay ietf command.

The IP address on S0/0/1 of R3 is configured incorrectly.

The Frame Relay map statement on the R3 router for the PVC to R2 is configured with an incorrect DLCI number.

Inverse ARP is providing false information to the R1 router.

The Frame Relay map statement on the R3 router for the PVC to R2 is configured with an incorrect DLCI number.
15.Refer to the exhibit. A network administrator is configuring Frame Relay subinterfaces on R1. A distance vector routing protocol has also been configured. Data is routing successfully from R1 to networks that are connected to R2, R3, and R4, but routing updates between R2 and R3 are failing. What is the possible cause of this failure?

Subinterfaces cannot be used on multipoint Frame Relay links.

Multipoint Frame Relay networks cannot be used with this IP addressing scheme.

Two DLCI identifiers cannot be configured on one subinterface.

Split horizon is preventing successful routing table updates on the multipoint link.

Split horizon is preventing successful routing table updates on the multipoint link.
10.Refer to the exhibit. Which two statements are correct? (Choose two.)

The IPv4 address of interface S0/1/0 on RA is 192.168.1.2.

The DLCI that is attached to the VC on RB to RA is 62.

The DLCI that is attached to the VC on RA to RB is 62.

The Frame Relay map was set by using the command frame-relay map.

The IPv4 address of interface S0/1/1 on RB is 192.168.1.2.

The DLCI that is attached to the VC on RB to RA is 62.

The IPv4 address of interface S0/1/0 on RA is 192.168.1.2.

(order doesn’t matter)

LEASED LINE / FRAME RELAY

customers pay for an end-to end connection

used in one-to-many networks

used in one-to-one network line only

requires a DSL router

customers share bandwidth

customers do not share the line

uses virtual circuits

requires more equipment to purchase and maintain

LEASED LINE

customers pay for an end-to end connection

customers do not share the line

requires more equipment to purchase and maintain

used in one-to-one network line only

FRAME RELAY

used in one-to-many networks

uses virtual circuits

customers share bandwidth

-the bandwidth available above the CIR up to the access rate of the link
-the data transmission bandwidth guaranteed over the local loop by the service provider
-a negotiated rate above the CIR that the customer can use to transmit for short burst
-the capacity of the local loop
1 the capacity of the local loop
-not scored-
2 the bandwidth available above the CIR up to the access rate of the link
3 a negotiated rate above the CIR that the customer can use to transmit for short burst
4 the data transmission bandwidth guaranteed over the local loop by the service provider
What is different about using IPv6 with Frame Relay compared to using IPv4?
the protocol to obtain the Layer 3 address of the opposite device
the encapsulation method
the length of the Layer 2 and Layer 3 headers
the IP address and the length of the DLCI number
the protocol to obtain the Layer 3 address of the opposite device
Match the Frame Relay term to the description. (Not all options are used.)
used to obtain neighbor IP address
1 a unique connection number
2 used as a result of congestion
3 a connection between two sites
4 used to obtain neighbor IP address
inverse ARP DLCI, PVC, FECN,
1 DLCI
2 FECN
3 PVC
4 Inverse ARP
Here is a link to the PT ActivityView in a new window.

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.

What DLCI number is used to send traffic from RouterA and what is the IP address of RouterB?

50 and 10.10.10.2
103 and 10.10.10.1
50 and 10.10.10.1
103 and 10.10.10.2

50 and 10.10.10.2
What is an advantage of configuring subinterfaces in a Frame Relay environment?
makes the DLCIs globally significant
eliminates the need for using Inverse ARP
reduces split horizon issues
improves flow control and bandwidth usage
reduces split horizon issues
How are Frame Relay virtual circuits identified?
CIR
DLCI
VPI
MAC
SPID
DLCI
What are two reasons Frame Relay is more cost-effective than leased lines? (Choose two.)
time division multiplexing
uses less equipment
optimized packet routing
shares bandwidth across a large customer base
dynamic IP addressing
uses less equipment

shares bandwidth across a large customer base

Fill in the blank.
The maximum average data rate that a service provider guarantees to a customer is known as the _____
CIR
In what situation would it be best to use Frame Relay subinterfaces?
when IPv6 is used
when VLSM is used
when static routing is used
any time EIGRP or OSPF is used across the Frame Relay cloud
any time EIGRP or OSPF is used across the Frame Relay cloud
If Inverse ARP is not available for use, how can a network administrator still provide a Frame Relay connection to the service provider and forward routing updates?
Use dynamic mapping.
Use static mapping with the broadcast keyword.
Use an LMI type of cisco.
Use the ietf keyword when activating Frame Relay
Use static mapping with the broadcast keyword
A router in a Frame Relay network needs to forward a message received from a host. What two methods does the router use to identify the correct VC to forward the message? (Choose two.)
The router forwards the frame to all ports in the network and learns the address from the reply frame.
The destination host IP address is embedded in the DLCI.
The router searches Inverse ARP tables for maps of DLCIs to IP addresses.
A table of static mappings can be searched.
The router broadcasts a request for the required IP address.
The router searches Inverse ARP tables for maps of DLCIs to IP addresses

A table of static mappings can be searched

What keyword is used in a Frame Relay static map configuration when OSPF is used among various sites of a corporation?
broadcast
cisco
ietf
ospf
broadcast
40
Refer to the exhibit. Which statement is a correct deduction from the Frame Relay configuration that is shown?

The router is using a Cisco proprietary encapsulation.
The router will dynamically learn the LMI type from the Frame Relay switch.
The router can communicate with a non-Cisco Frame Relay switch.
The router Frame Relay interface is configured for point-to-point subinterfaces

The router can communicate with a non-Cisco Frame Relay switch
What are three mechanisms used by Frame Relay to reduce network overhead caused by congestion? (Choose three.)
BECN
NTP
DLCI
FECN
DE
per-VC flow control
LMI
FECN

BECN

DE

Which bit is set by a Frame Relay switch to inform the source station that there is congestion on the network?
BECN
CIR
DE
FCS
FECN
BECN