How does Frame Relay technology process frames that
contain errors? (Choose two.)
Frame Relay services depend on the
upper layer protocols to handle error recovery.
It requires the receiving device to
request that the sender retransmit erroneous frames.
FECN, BECN, and DE bits are set in
the frames to minimize errors.
The receiving device drops any
frames that contain errors without notifying the sender.
The frame relay switch notifies the
sender that errors were detected.
2
Which statement identifies a reason for using
point-to-point subinterfaces in Frame Relay networks?
Subinterfaces overcome routing
update and split-horizon issues that occur with multipoint logical
interfaces on a single physical interface.
A point-to-point subinterface does
not require an IP address and therefore saves address space.
Point-to-point subinterfaces
provide greater reliability and reachability in Frame Relay networks
by requiring a mesh topology for network configurations.
Point-to-point subinterfaces
increase the number of DLCIs that can be configured in a Frame Relay
network.
3
A ping is sent to address 192.168.50.10 from the
Peanut router. Which DLCI will be used to send the ping?
110
115
220
225
4
Which data link layer protocol is used to carry frames
across a Frame Relay link?
PPP
LAPD
LAPF
Frame
Relay
5
Which bits are set in the data frames to request that
a device reduce the flow of data sent to or from a Frame Relay
switch?
EIR bits
ECN bits
CIR bits
DE bits
Window
bits
6
Why are full mesh topologies seldom found in large
Frame Relay networks?
Additional hardware is required to
achieve the mesh.
The additional virtual circuits
slow the link access speeds.
The required number of links
becomes prohibitive.
Additional interfaces are required
since each can only support 10 virtual circuits.
The speed of transmission slows in
inverse proportion to the square of the number of
links.
7
Which of the following occurs when the command frame-relay map ip 10.1.1.1 22 is configured on the router?
(Choose two.)
DLCI 22 will replace the MAC
address in the ARP table for entry 10.1.1.1
The remote circuit with DLCI 22 can
receive a ping.
Inverse-ARP will be used to add an
entry for 10.1.1.1 into the frame-relay map table using DLCI
22.
Pings to 10.1.1.1 will be sent on
the circuit labeled DLCI 22.
The router will use DLCI 22 to
forward data to 10.1.1.1.
8
Why is the keepalive mechanism added as an extension
to the Local Management Interface in a Frame Relay
network?
to identify which routers were
experiencing congestion
to verify the status of PVCs in the
Frame Relay network
to dynamically map a MAC address to
an IP address in a Frame Relay network
to signal to the router the status
of the routing protocols configured in the Frame Relay
network
9
Which of the following statements are true about a
basic Frame Relay WAN connection between a customer and the service
provider? (Choose two.)
DTE devices such as routers and
FRADs transmit user data.
DTE devices such as Frame Relay
switches transport the data between DTE devices.
An Ethernet connection between the
router and the frame relay switch allow access to the frame relay
network.
Serial connections between the
customer and the frame relay network are used to transport
data.
The Frame Relay WAN is a mesh of
interconnected routers.
10
What is created between two DTEs in a Frame Relay
network?
switched parallel circuit
permanent virtual circuit
limited access circuit
ISDN circuit
Frame Relay
circuit
11
Which features make Frame Relay technology a
cost-effective alternative to a mesh of dedicated leased lines?
(Choose three.)
allows a single interface to
support multiple PVCs
minimizes the equipment required to
be purchased by the customer
requires one router interface for
each PVC
provides the customer with
redundancy if a single interface goes down
allows the customer to pay for the
average bandwidth requirement rather than the maximum bandwidth
requirement
12
Which of the following allow the router to map data
link layer addresses to network layer addresses in a Frame Relay
network? (Choose two.)
ARP
RARP
Proxy ARP
Inverse ARP
LMI status messages
ICMP
13
When troubleshooting a Frame Relay connection, an
administrator entered the show interfaces s0/0 command and
received the output shown in the exhibit. What are two probable
reasons for this problem? (Choose two.)
The cable between the CSU/DSU and
the router is disconnected.
The serial 0/0 interface is
shutdown.
The router is not configured for
the same Frame Relay PVC as the switch.
The LMI type on the Frame Relay
switch is NOT ANSI.
The address of the Frame Relay
switch is not in the routing table.
14
Which commands were added to the configuration to
produce the output shown in the graphic? (Choose two.)
Router(config)# ip route
192.168.192.4 255.255.255.0 17 broadcast
Router(config-if)# frame-relay
lmi-type cisco 17
Router(config-if)# frame-relay
map ip 192.168.192.4 17 broadcast
Router(config-if)# ip address
192.168.192.4 255.255.255.0 DLCI 17 static
Which methods are used to minimize heavy traffic on a
Frame Relay network? (Choose two.)
FRADs or routers set ECN bits to
request that the Frame Relay switch reduce the flow of frames on the
link.
Windowing is used to reduce the
size of the frames sent across the link.
The Frame Relay switch will drop
packets that have the DE bit set.
When a switch sees its queue
increasing, it notifies DTEs to reduce the flow of traffic.
When congestion occurs, all frames
are dropped until the congestion
clears.
17
When troubleshooting a frame relay connection, a
technician entered the show frame-relay pvc command shown in the
graphic. What can be concluded from the output shown in the graphic?
(Choose three.)
The output in the debug frame-relay
lmi command will indicate status 0x2 for DLCI 18.
DLCI 16 was correctly programmed on
the switch, but the remote router may be misconfigured.
The frame relay switch is sending
LMI status messages about DLCI 16 to the Singapore router.
Congestion has been experienced on
DLCI 18.
Some packets have been set to be
dropped if congestion is experienced on the
PVC.
18
Which of the following DLCIs are reserved?
16
127
255
1023
2048
19
Which of the following statements regarding multipoint
subinterfaces are true? (Choose two.)
A single multipoint subinterface is
used to establish PVC connections to multiple physical interfaces on
remote routers.
Each multipoint link is in its own
subnet.
The physical interface does not
have an IP address.
Split-horizon is disabled allowing
routing updates to be re-transmitted on every subinterface.
Multipoint subinterfaces require
the encapsulation frame-relay command to be issued
individually for each subinterface to operate
correctly.
20
How is a permanent virtual circuit identified in a
Frame Relay network that is carrying IP traffic?
It is given a fixed locally
significant identification number.
It is identified by the MAC address
of the router interface.
Dynamic virtual channel identifiers
are assigned to each frame transmitted across the network.
It is identifed by the MAC address
of the switch port.
21
What is the purpose of the FCS field in a Frame Relay
frame?
It serves to distinguish one frame
from the next.
It is used to signal network
congestion.
It is used to detect if the frame
has been corrupted and should be discarded.
It determines which VC should be
used for transmission.
