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DRSEnt Final
-

CCNA Discovery: Introducing Routing and Switching in the
Enterprise (Version 4.0)



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1





Refer to the exhibit. Internet access is crucial for the company network shown. Internet access is
provided by two ISPs. ISP1 is the primary provider and ISP2 is the backup provider. The network
adm
inistrator configures BorderR as the border router so that in normal operations, all Internet traffic
goes through ISP1. However, if the link to ISP1 fails, then BorderR will automatically forward Internet
traffic to ISP2. The administrator configures two
default routes:


BorderR(config)# ip route 0.0.0.0 0.0.0.0 192.168.100.1 200

BorderR(config)# ip route 0.0.0.0 0.0.0.0 172.16.1.1


However, when the administrator issued the show ip route command to verify the configuration, only
the second default route
is in the routing table. Why is the first default route not showing?


The first configuration command overwrites the second command.


The first default route will be installed into the routing table if there is traffic with an IP address
that is destined f
or the 192.168.100.0 network.


/
This is expected because the link to ISP1 is active. If the link to ISP1 goes down, then the first
default route will be installed into the routing table.


The first default route cannot be installed into the routing table unless the administrator
manually disables the second default route with the no ip route 0.0.0.0 0.0.0.0 172.16.1.1 command.




2


What are two features of an extended IP ACL? (Choose two.)


It uses numbers 1 through 99 for identification.


/
It can permit or deny traffic based on source or destination address.


It detects malicious attacks against the network and logs them on a server.


/
It can filter traffic based on the protocol and port
numbers.


It encrypts traffic between hosts.




3


Which two items does ACL logging report? (Choose two.)


ACL number


number of runts and giants


/
number of fragmented packets


/
source and destination addresses


number of packets with VLAN tags applied




4





Refer to the exhibit. What is the significance of the value 120 in the line R 192.168.4.0/24 [120/1] via
192.168.2.2, 00:00:26, Serial0/0/0?


It represents the amount of time before the entry will expire.


It represents the amount of time that the e
ntry has been in the table.


/
It is the value that is used to compare routes from different routing protocols.


It is the number of hops the packet must take to reach the destination.




5





Refer to the exhibit. Router R1 connects to the Internet as
shown and is configured with a static default
route. A network administrator is currently configuring OSPF on R1 and wants the static default route to
propagate to the neighbors of R1. What must be configured on R1 in order for it to propagate the route
to

its neighbors once OSPF is configured?


Issue the network 10.0.0.0 command.


/
Enter the default
-
information originate command.


Configure the 0.0.0.0/0 network in area 0.


OSPF will automatically advertise the default route because it is a directly connec
ted route.




6


What are two characteristics of EIGRP? (Choose two.)


It supports a maximum hop count of 15.


/
It sends small hello packets to maintain knowledge of its neighbors.


/
It forwards complete routing tables in its updates to neighboring routers
.


It supports equal and unequal cost load balancing.


It supports only one network layer protocol.




7





Refer to the exhibit. An administrator sees this error message after entering commands to configure a
router interface. Which command could the adm
inistrator enter that would avoid the error?


Router(config
-
if)# ip address 192.168.4.0/24


/
Router(config
-
if)# ip address 192.168.4.1 255.255.255.0


Router(config
-
if)# ip address 192.168.4.0 255.255.255.240


Router(config
-
if)# ip address 192.168.4.255 255
.255.255.0




8


Which WAN connection method uses a PVC?


leased line


ISDN


DSL


/
Frame Relay




9





Refer to the exhibit. If R4 is announcing all shown internal networks as a summary address to the ISP,
which summary address will be most specific?


192.168.1.0/22


192.168.4.0/21


192.168.6.0/23


/
192.168.8.0/21


192.168.4.0/22




10


Which subprotocol does PPP use to establish, maintain, test, and terminate a point
-
to
-
point link?


/
LCP


NCP


IPCP


IPXCP




11


Which routing protocol uses RTP for reli
able route update delivery?


RIPv1


RIPv2


OSPF


/
EIGRP




12


What are two differences between RIPv1 and RIPv2? (Choose two.)


/
RIPv1 broadcasts routing updates to 255.255.255.255 while RIPv2 does not.


RIPv1 sends subnet mask information in the routing
update but RIPv2 does not.


/
In contrast to RIPv1, RIPv2 allows the use of discontiguous networks.


RIPv2 is a classful routing protocol while RIPv1 is a classless protocol.


RIPv1 supports an authentication mechanism but RIPv2 does not.




13





Refer to

the exhibit. The network administrator has implemented NAT on R1. Which two addresses are
valid inside global addresses? (Choose two.)


192.168.1.1


192.168.1.2


198.133.219.1


/
198.133.219.102


/
198.133.219.103




14


Which configurable variable is used
to determine the election of a spanning tree root
bridge?


/
lowest bridge priority


lowest native VLAN ID


highest VTP revision number


highest management VLAN IP address




15





Refer to the exhibit. Assuming that the RIPv1 routing protocol is enabled
and all networks have been
correctly configured on each router, which statement is true?


All packets from H1 that are destined to H2 will arrive at H2.


/
None of the packets from H1 that are destined to H2 will arrive at H2.


Approximately half the traffi
c from H1 that is destined to H2 will reach R3.


Some of the packets from H1 that are destined to H2 will be sent to the switch that is connected
to network 192.168.3.64/26.





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16


A RIPv2 enabled router has been configured with the redistribute static command. What
function does this command serve?


creates a default route


/
propagates a default route to neighboring routers


allows the default administrative distance for static routes to be altered


establishes a backup static route which can be used if the dynamic r
outing protocol fails




17





Refer to the exhibit. Both routers are configured to use the EIGRP routing protocol. However, when the
show ip eigrp neighbors command is issued at R1, the output displays that the routers are unable to
establish adjacency.
What is the possible cause of this problem?


/
EIGRP routing is incorrectly configured at R1.


The autonomous system number is the same on both routers.


The no auto
-
summary command is applied on both routers.


The IP address of the serial interfaces of bot
h routers is incorrectly configured.




18


How can a network administrator determine if network traffic has matched an ACL if
there is no syslog server configured on the network?


/
Issue the show access
-
lists command.


Delete the ACL and add it back, noti
ng changes in traffic flow.


Remove the ACL from any configured interface and note traffic changes.


Verify the counters on the router interface and see if they are incrementing.




19





Refer to the exhibit. Which two statements are true about the
output that is shown? (Choose two.)


/
The feasible distance to network 172.20.2.0 is 2172416.


/
The reported distance to network 172.20.4.0 is 2172416.


Serial 0/0/1 represents the next hop interface for network 172.20.4.0.


Two routes in the routing table

would be used to load
-
balance traffic to network 172.20.3.0.


The letter P represents that the algorithm is calculating and the routes are not in use.




20


Which feature of RSTP differentiates it from STP?


/
PortFast


UplinkFast


active topology


five p
ort states




21





Refer to the exhibit. What is the purpose of the command: RouterA(config)# access
-
list 1 permit
192.168.16.0 0.0.0.255?


It identifies traffic on all inside interfaces to be translated and given access to the ISP router.


It identifies

traffic from the fa0/1 interface to be translated and given access to the ISP router.


It allows traffic from the ISP to reach all of the inside interfaces.


/
It identifies traffic from the fa0/0 interface to be translated and given access to the ISP rout
er.


It allows traffic from the ISP router to the fa0/1 interface.




22


An administrator is configuring a new router to permit out
-
of
-
band management access.
Which set of commands will allow the required login using a password of cisco?


Router(config)#
line vty 0 4


Router(config
-
line)# password manage


Router(config
-
line)# exit

Router(config)# enable password cisco


/
Router(config)# line vty 0 4


Router(config
-
line)# password cisco


Router(config
-
line)# login


Router(config)# line console 0


Router(
config
-
line)# password cisco


Router(config
-
line)# login


Router(config)# line console 0


Router(config
-
line)# password cisco

Router(config
-
line)# exit

Router(config)# service password
-
encryption




23


What information is displayed in the output of t
he show version command on a
router?


interface addresses


routing table entries


/
amount of flash memory


configured routing protocols




24


What will allow a LAN switched network to maintain VLAN configuration consistency
across the network?


Enable
CDP on all switch access ports.


Configure DTP on all trunk ports.


/
Enable STP on all switches.


Configure VTP on all switches.




25





Refer to the exhibit. Routers R1 and R2 are directly connected with a crossover cable and configured for
single area
OSPF but are unable to exchange any routes. What is the likely cause?


Both routers have the same priority.


The configured hello intervals are not the same.


The router ID of R1 must be on the same network as the router ID of R2.


/
The OSPF interface netw
ork type must be point
-
to
-
point for the connection between the
routers.




26





Refer to the exhibit. Router1 and Router2 are both running RIPv2 with autosummarization disabled.
Which subnet mask will Router1 associate with network 192.168.4.16/28?


255.
255.0.0


255.255.240.0


255.255.255.0


/
255.255.255.240


255.255.255.248




27





Refer to the exhibit. A network technician is connecting a new PC to port Fa0/9. What are two
characteristics of this implementation? (Choose two.)


The PC is a member of
VLAN 30.


The PC belongs to the default native VLAN.


/
The PC does not know its VLAN assignment.


Broadcast messages sent from the PC will be seen by all devices.


/
A Layer 3 device is required for the PC to communicate with hosts on other VLANs.




28


A
Frame Relay service provider is reviewing a contract with a potential customer. Which
term would be used when referencing the minimum guaranteed bandwidth that is provided on each
virtual circuit?


EIR


/
CIR


Tc


Bc


DE




29


In order for a VLAN to be cre
ated on a switch, what configuration parameter is
required?


VTP domain name


/
VLAN number


VLAN IP address


VLAN database name




30





Refer to the exhibit. A network administrator has configured a PPP connection between two routers. All
attempts fail that use PPP to establish the serial link between the routers. The administrator issues the
command show ip interface serial 0/0/0 on route
r RA and it indicates that the line protocol is down.
What could be a cause of this problem?


Both routers should use interface S0/0/0.


/
The usernames are misconfigured on both routers.


The password should be configured to match the hostname.


The IP add
ress on interface S0/0/1 on router RC is incorrect.





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-

CCNA Discovery: Introducing Routing and Switching in the
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31


What should be
considered when designing an addressing scheme that uses private IP
address space?


Private IP addresses are globally routable.


Address summarization is not recommended.


/
Hierarchical design principles should be utilized.


Discontiguous networks are no l
onger problematic.




32


What are two WAN protocols that define parameters for data encapsulation? (Choose
two.)


/
PPP


V.35


X.21


/
HDLC


EIA/TIA
-
232




33


Which address is used to access a switch from a remote location in order to make
configuration ch
anges?


the default gateway that is configured on the switch


the IP address of the management VLAN interface on the switch


the default gateway that is configured on the management workstation


/
the IP address configured on the VTY line that is used to es
tablish an incoming connection to
the switch




34





Refer to the exhibit. OSPF has been configured as a routing protocol on all routers in OSPF area 0. Based
on the cost value of the links, which path will be selected by the SPF algorithm to forward
traffic from
router R4 to network A?


R4
-
R2
-
R1


R4
-
R3
-
R1


R4
-
R2
-
R3
-
R1


/
R4
-
R3
-
R2
-
R1




35


At what point in the enterprise network are packets examined prior to entering the
network?


campus core


/
provider edge


/
enterprise edge


enterprise branch




36





Refer to the exhibit. The network administrator has configured R1, R2, and R3 to use RIPv2, and the
network is fully converged. The hosts on the internal network are able to access R2, but they are unable
to access the Internet.


How can the administra
tor solve this problem?


Enable the Serial0/0/0 interface of R2.


/
Configure a default route on R2 via Serial0/0/0 and propagate it to R1 and R3 using RIPv2.


Configure a default route on the ISP via Serial0/0/0.


Configure the correct subnet mask on the S
erial0/0/0 interface of R2.




37





Refer to the exhibit. EIGRP has been configured for all routers in the topology. Given the exhibited
metric values, which path will be selected by the DUAL algorithm as a successor and feasible successors
or feasible
successor for traffic that travels from router A to router E?


/
Path A
-
B
-
E will be selected as a successor. Both paths A
-
C
-
E and A
-
D
-
E will be selected as
feasible successors.


Path A
-
D
-
E will be selected as a successor. Both paths A
-
B
-
E and A
-
C
-
E will be
selected as
feasible successors.


Path A
-
B
-
E will be selected as a successor. Path A
-
C
-
E will be selected as a feasible successor.


Path A
-
D
-
E will be selected as a successor. Path A
-
B
-
E will be selected as a feasible successor.




38





Refer to the exhi
bit. The command debug ip rip was used on a router. From the exhibited output, what
can an administrator determine about the RIP protocol that is running on the router?


RIPv2 is globally configured on the router.


Interface Fa0/0 is configured to receive
only RIPv2 updates.


/
Interface S0/0/0 is configured to send both RIPv1 and RIPv2 updates.


The router has received a RIP update about the 172.16.3.0 network from a neighboring router.




39


Which two addresses are RFC 1918 private addresses? (Choose
two.)


/
10.192.32.67


/
64.10.10.2


172.31.220.7


172.168.12.1


192.16.0.1




40





Refer to the exhibit. In what sequence (from first to last) does an OSPF router check the parameters
listed when selecting the DR?


/
C, B, A, D


D, C, B, A


A, B, C, D


A,
C, B, D


/
B, C, A, D




41





Refer to the exhibit. All routers are configured to use the EIGRP routing protocol, and the network
administrator has configured the serial interface with the displayed commands. Which summary route
will show in the routing t
able of R1 as a result of these commands?


a route pointing to the FastEthernet0/0 interface


a route pointing to the Serial0/0/0 interface


/
a route pointing to the Null0 interface


a route pointing to the loopback0 interface




42


Which OSPF neighbor st
ate indicates that two neighbors are synchronized and have
formed adjacencies?


/
full


init


2
-
way


exstart


loading


exchange




43





Refer to the exhibit. Which two options correctly map the network layers and the components of the
Cisco Enterprise
Architectures to the functionalities they provide on the network? (Choose two.)


Option 1


/
Option 2


/
Option 3


/
Option 4


Option 5


Option 6




44





Refer to the exhibit. All routers are configured to use OSPF with the default configuration. The networ
k
administrator wants to ensure that R1 will be the DR when the routers are booted.


What are two ways the network administrator could accomplish this goal?


Configure the OSPF priority value of the Fa0/0 interface of R1 to 0.


Configure the router ID of
R2, R3, and R4 to a higher value than R1.


Change the priority value of the Fa0/0 interface of R2, R3, and R4 to 255.


/
Configure a loopback interface on R1 with an IP address higher than any IP

address on the other routers.


Configure the OSPF priority va
lue of the Fa0/0 interface of R1 to a higher value than the Fa0/0
interface of any other router.




45





Refer to the exhibit. Which VTP function will this switch perform?


It will create, change and share local VLAN information with other switches in th
e XYZ domain.


It will forward to other switches the VLANs that are created in Switch1.


It will back up the VTP database for domain XYZ.


/
It will forward VTP configuration information for domain XYZ.





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CCNA Discovery: Introducing Routing and Switching in the
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46





Refer to the exhibit. A network administrator wants to block Telnet sessions from h
ost B to hosts E and
F. Where should ACL 110 be placed if the administrator follows Cisco best practices?


/
on the Fa0/0 interface of R1 inbound


on the S0/0/0 interface of R1 inbound


on the S0/0/0 interface of R3 outbound


on the Fa0/0 interface of R3 in
bound




47





Refer to the exhibit. If the router
-
id command has not been applied on R1, what is the router ID of R1?


10.20.30.40


10.254.254.1


172.20.1.33


192.168.20.1


/
192.168.20.9




48


A network administrator is configuring an edge router to
support external access to
several internal web servers that have private IP addresses. Which type of address resolution would be
appropriate for this scenario?


PAT


static PAT


/
static NAT


dynamic NAT




49





Refer to the exhibit. A network administra
tor has configured EIGRP authentication between routers R1
and R2. After the routing tables are reviewed, it is noted that neither router is receiving EIGRP updates.
What is a possible cause for this failure?


The same key chain name must be used on each r
outer.


The same number of key strings must be used on each router.


The key string should be used in interface mode instead of the key chain.


/
The same autonomous system numbers must be used in the interface configurations of each
router.


The authentica
tion configuration is correct, issue the show ip eigrp neighbors command to
troubleshoot the issue.




50


What will be the two wildcard masks required in an extended access list statement that
blocks traffic to host 192.168.5.45 from the 172.16.240.0/27 n
etwork? (Choose two.)


/
0.0.0.0


255.255.240.0


255.255.255.255


0.0.31.255


255.255.255.240


/
0.0.0.31





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