Practice Fina Exam Aswer - CCNA 4 WAN Technologies
1
Which of the following LCP options can be configured
for PPP? (Choose three.)
CHAP
Stacker
IPCP
CDPCP
Multilink
2
ITU-T Q.921 specifies the use of which protocol for
sending control and signaling messages between the router and the
ISDN switch?
HDLC
IPCP
LAPB
LAPD
NCP
SS7
3
Which of the following describe functions of the
Point-to-Point protocol with regards to the OSI model? (Choose
three.)
PPP uses Layer 3 of the OSI model
to establish and maintain a session between devices.
PPP operates at all layers of the
OSI model.
PPP uses the data link layer to
configure such options as error detection and compression.
PPP provides a mechanism to
multiplex several network layer protocols.
PPP uses Network Control Protocols
(NCP) to test and maintain connectivity between devices.
PPP can be configured on both
synchronous and asynchronous serial
interfaces.
4
Which of the following statements regarding
point-to-point subinterfaces are true? (Choose two.)
A point-to-point subinterface on
one router must be connected to a similar subinterface on a remote
router.
Each point-to-point subinterface
connection is configured with its own subnet.
The DLCIs configured on the remote
and local routers must be the same for the PVC.
LMI frames are not transmitted
through a subinterface.
Routing updates in point-to-point
networks are not subject to the split-horizon
rule.
5
How will data be transmitted from the router to the
ISP if the router has the two links shown in the graphic?
Both links will transmit data at
the same rate.
1544 bits can be transmitted
simultaneously from the router over the T1 line.
Both links will transmit bits one
by one.
The 56K link will transmit a
maximum of 53 bits at the same
time.
6
A network administrator is asked to design a system to
allow simultaneous access to the Internet for 250 users. The ISP for
this network can only supply five public IPs. What can be used to
accomplish this task?
routable translation
dynamic translation
static translation
port address
translation
7
Which of the following statements are true about Frame
Relay? (Choose three.)
Frame Relay operation is defined by
a series of ISO standards.
Frame Relay is a packet switched,
connection-oriented, wide area network service.
Frame Relay only supports
point-to-point connections.
A router can be considered as data
terminal equipment (DTE) in a frame relay system.
Frame Relay is a cell switched,
connection-oriented, wide area network service.
Frame Relay networks use a subset
of the HDLC protocol to carry
information.
8
Why would data frames be discarded in a Frame Relay
network? (Choose two.)
The frame contains an incorrect IP
address.
An error has been detected in
computing the frame check sequence.
There is not enough bandwidth
dedicated for the data contained in the frame.
Data is transmitted at a rate
greater than the access speed.
The frame contains an incorrect
DLCI.
9
Which of the following can be concluded from the
router output displayed in the graphic? (Choose two.)
The local DLCI number of this PVC
is 100.
The interface has been configured
for subinterfaces and this map is for subinterface 0.
Inverse ARP has determined the
remote ip address as 10.140.1.1.
The LMI type is ANSI (0x64).
There is currently no congestion on
the link.
10
When planning simple WAN connections for a small
company, which feature of the three layer hierarchical model makes
it a good choice for the WAN topology.
It provides for redundancy.
It allows for easy WAN expansion in
case of company growth.
It is less expensive.
It provides faster connection
time.
It provides less latency and
jitter.
11
The command output shown in the graphic was taken from
a Cisco 806 broadband router. Which kind of address translation is
in effect on this router?
static
dynamic
overload
private
public
12
A network administrator has been asked to provide the
network in the United States with an ISDN WAN link. The router
available to provide the WAN connection is a non-modular Cisco
router with two serial connections. What must be done to adapt one
of the serial interfaces of this router for the ISDN
connection?
Nothing. The router is already
suitable.
Purchase a BRI WAN interface card
to install in the router.
Purchase a U interface to install
in the router.
Purchase a TA/NT1 device to install
on the router.
13
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.
14
Which statements about DHCP are true? (Choose
three.)
DHCP uses TCP.
DHCP uses UDP.
DHCP sends messages to the server
on port 67.
DHCP sends messages to the server
on port 68.
DHCP sends messages to the client
on port 67.
DHCP sends messages to the client
on port 68.
15
Which command configures the SPID on the first B
channel of an ISDN interface?
Router(config)# isdn spid0 spid-number [ldn]
Router(config)# isdn spid1 spid-number [ldn]
Router(config-if)# isdn spid0 spid-number [ldn]
Router(config-if)# isdn spid1 spid-number [ldn]
16
Which command would produce the output shown in the
graphic?
show ip dhcp server
statistics
show ip dhcp binding
debug ip dhcp server
events
debug ip dhcp
binding
17
Which commands can be used to identify which DLCIs are
active? (Choose two.)
show frame-relay map
show frame-relay lmi
show frame-relay pvc
show frame-relay
interface
show interfaces
show ip
route
18
When PPP authentication is enabled, which of the
following may be checked before establishing a PPP link between two
devices? (Choose two.)
the enable password on the remote
device
the ip host configuration on the
remote device
the security server database for
the username and password of the remote device
the hostname and enable password on
the local device
the local database for the username
and password of the remote device
19
Which of the following are supported by a BRI
interface on a router? (Choose two.)
Two independent channels that can
carry analog data with a bandwidth of 64 KHz.
A single 128 Kbps digital bearer
channel.
Two multiplexed channels carrying
digital data.
A single 64 Kbps signaling
channel.
A multiplexed data channel that can
only handle SS7 information.
A 16 Kbps delta channel used for
signaling purposes.
20
An administrator consoled into the Jelly router needs
to telnet to the Butter router. What DLCI will the Jelly router
place in the frame to perform this operation?
110
115
220
225
21
What is placed in the address field of a frame that
will travel from the DC office of ABC company to the Orlando
office?
MAC address of the Orlando
router
MAC address of the DC router
192.168.1.25
192.168.1.26
DLCI 100
DLCI
200
22
The WAN connection for a nationwide company with 250
offices must support constant connections to core layer services for
file sharing, and occasional Internet access. Which combination of
WAN technologies will meet these needs with minimum
expense?
Frame Relay PVC for Internet access
and ATM for file server access
Frame Relay PVC for Internet access
and ISDN for file server access
ISDN for Internet access and X.25
for file server access
ISDN for Internet access and Frame
Relay PVC for file server access
23
What does a DLCI of 0 indicate about a frame? (Choose
two.)
This is the first data frame sent
by the router.
This is a management frame.
The encapsulation type is
Cisco.
The encapsulation type is
IETF.
The LMI type is Ansi or
q933a.
The LMI type is
Cisco.
24
A company needs a WAN connection that is capable of
transferring voice, video, and data at a minimum data rate of 155
Mbps. Which WAN connection is the best choice?
X.25
DSL
ATM
ISDN BRI
ISDN
PRI
25
What are three features of the CHAP protocol? (Choose
three.)
exchanges a random challenge number
during the session to verify identity
sends authentication password to
verify identity
prevents transmission of login
information in plain text
disconnects the PPP session if
authentication fails
initiates a two-way
handshake
26
Which of the following devices is used to establish
the communications link between the customer equipment and the local
loop for digital lines?
terminal adapter
modem
CSU/DSU
PBX switch
ISDN switch
Frame Relay
Switch
27
Which command would be used to exclude the IP address
192.168.24.5 from the DHCP address pool on a router?
Router(dhcp-config)# ip dhcp
excluded-address 192.168.24.5
Router# ip dhcp excluded-address
192.168.24.5
Router(config-excluded)# ip dhcp
excluded-address 192.168.24.5
Router(config)# ip dhcp
excluded-address 192.168.24.5
A router needs to forward a message received from a
host. How does the router 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.
29
Which of the following switching types will allow the
communication devices in the provider's network to be shared and
only allocated to an individual subscriber during data
transfer?
circuit-switched
packet-switched
frame-switched
dedicated-switched lines
lease-switched
30
Which of the following IP addresses are defined by RFC
1918 as private addresses? (Choose three.)
192.168.146.0/22
172.10.25.0/16
172.31.0.0/16
20.0.0.0/8
10.172.92.8/29
31
Which of the following describes the PAP protocol?
(Choose two.)
sends unencrypted authentication
passwords
performs a three-way
handshake
allows repeated login
attempts
uses the remote router hostname to
verify identity
sends a random challenge throughout
the session
32
Which of the following protocols can be used to
encapsulate data traffic sent from a router BRI interface? (Choose
two.)
Link Access Protocol - Data
High-Level Data Link Control
Logical Link Control
Serial Data Link Control
Point to Point protocol
Binary Synchronous Control
protocol
33
Which statement explains why basic DSL is an unpopular
WAN connectivity choice for enterprise computer departments that
support home users?
DSL offers insufficient bandwidth
to home users.
DSL requires the installation of
new cables, which is not always possible for home users.
DSL dialup connection time is too
slow for business use.
DSL has limited geographical
availability.
34
Which of the following are functions of the Local
Management Interface used in Frame Relay networks? (Choose
three.)
exchange information about the
status of virtual circuits
map DLCIs to network
addresses
provide flow control
provide error notification
provide congestion
notification
send keepalive packets to verify
operation of the PVC
35
An ISDN router is configured for DDR as shown in the
graphic to provide Internet connectivity for the company.
Immediately after a user in the company attempts opens a web browser
to connect to the Internet, another user in the company tries to
download a file using FTP. What will happen? (Choose two.)
The user that opened the browser
will connect to the Internet because the DDR link will consider this
traffic interesting.
The Internet user will be
disconnected because the FTP data will cause the DDR link to shut
down.
The DDR link will allow the FTP
traffic because it is interesting.
The DDR link will not allow the FTP
traffic because it is not interesting.
The FTP connection will fail
because the DDR link is already in use for the Internet
connection.
The FTP connection will succeed
because the web user already opened the DDR
link.
36
Which command will provide for CHAP authentication if
the hostname on a challenging router is tampa with a password of
florida?
username tampa password
florida
username tampa florida
hostname tampa password
florida
hostname tampa
florida
37
Which of the following is a function of a DCE
device?
determines the next-hop address for
a packet
multiplexes signals from several
sources
adapts information for use on a
service provider's network
used to directly connect two DTEs
to simulate a WAN network
38
Which operating systems support multiuser capability?
(Choose three.)
Linux
Windows 98
Windows ME
Windows XP
Windows
2000
39
Why was NAT created? (Choose two.)
to create firewalls on
routers
to conserve IP addresses
to translate domain names into IP
addresses
to map network addresses to the
corresponding data link address
to hide internal addresses from
external devices
40
Which of the following terms describes a device that
will put data on the local loop?
DLCI
CO
DCE
DTE
PRI
BRI
41
How many separate B channel circuits can be
provisioned on a PRI interface that uses a T1 line for
connectivity?
2
16
23
24
30
128
42
The LAN attached to the Ethernet interface of the
Raleigh router shown in the graphic is addressed with private IP
addresses. If one public IP is assigned to the company, which
commands could be used in a configuration that allows all devices
with private IPs in this network to access the Internet? (Choose
two.)
ip nat inside source list 1
interface serial0 overload
ip nat outside source list 1
interface serial0 overload
ip nat inside serial0
ip nat inside source list 1 pool
Raleigh overload
ip nat inside Raleigh
overload
ip inside nat source list 1
interface serial0 Raleigh
43
Which of the following describes the WAN devices and
cabling shown in the graphic? (Choose two.)
A null-modem cable is used between
RouterD and DeviceC for connectivity.
A DB-25 or DB-9 serial cable is
connected to interface S0/0 of RouterA.
DeviceB and DeviceC are DCE
devices.
The same encoding scheme must be
used by DeviceB and DeviceC.
A synchronous serial connection
exists between DeviceB and DeviceC.
44
Which of the following are commonly used as Data
Communications Equipment? (Choose two.)
modem
router
CSU/DSU
ISDN Switch
Frame Relay
Switch
45
What does the command debug isdn q921 display?
exchange of call setup and teardown
messages
PAP and CHAP authentication
traffic
Layer 2 messages on the D
channel
protocol errors and
statistics
Layer 2 messages on the B
channel
46
A technician is testing the functionality of a
recently installed router. The technician is unable to ping the
serial interface of a remote router. The technician executes the show interface serial0/0 command on the local router and sees
the following line in the output:
Serial0/0 is up, line
protocol is down
What are possible causes for this
command output? (Choose three.)
