CCNA2 - Examen 9 习题答案

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CCNA2 -
Examen 9 NO SE
CALIFICACION

Which of the following would be the default administrative
distance of a static IP route that references the IP address of the next
hop?
            a.-
0
            b.- 1   
            c.-
5
            d.-
20

When
issuing the show interfaces serial1 command, a network administrator
receives the output shown in the graphic. What are the possible causes of an
increase in the number of input errors? (Choose three.)
            a.- There
could be Layer 3 addressing problems.
            b.- There could be a problem with
faulty telephone equipment.
            c.- The
router hardware could be defective.
            d.- There
is an incorrectly configured encapsulation on the
interface.
            e.- There could be a problem with
the cabling.

Refer to the network graphic. A packet needs to travel from
Router F to Router A. Which path would be selected by the RIP routing protocol
if the default metrics are used?
            a.-
F, G, E, D, B,
A
            b.- F, E, D, C,
A
            c.- F, E, D,
A
            d.- F, E, D, B,
A

Which two are true regarding the debug commands? (Choose
two.)

            a.- Debug
commands may be issued from the user EXEC prompt.
            b.- The command undebug all will turn off all debug
operations.
            c.- By
default, the router sends the debug output and messages to the telnet
session.
            d.- The high processor overhead
incurred using debug may disrupt normal router
operation.
            e.- The
debug all command provides a summary view of router activity and can be
used frequently for troubleshooting.
            f.- The
show debugging command will display current events such as traffic on an
interface and error messages generated by nodes on the
network.

The
show interfaces command provides line and protocol status information.
Which of the following conditions would never occur in the output of this
command?
            
a.-
serial1 is up, line protocol is up
            b.- serial1
is up, line protocol is down
            c.- serial1
is down, line protocol is down
            d.- serial1 is down, line
protocol is up
            e.- serial1
is administratively down, line protocol is down

Why does a router build a routing table? (Choose two.)

            a.- to list available routes for
forwarding data
            b.- to map
local Layer 2 addresses to the remote Layer 3 destination
address
            c.- to
dynamically send periodic updates regarding the router's
status
            d.- to
prevent routing loops when redundant links are added to the
network
            e.- to select the best path to a
destination




Which of the following are advantages of using a static
route? (Choose three.)

            a.- secure
operation
            b.- highly
adaptable
            c.- low
maintenance configuration
            d.- low processor
overhead
            e.- precise
control of path selection

Which command will verify the functionality of all seven
layers of the OSI model on a network host?

            a.-
ping
            b.-
telnet
            c.- tracert
            d.-
debug

Which ICMP message type notifies source hosts that a
receiving host or network is not available?

            a.- time
exceded
            b.-
redirect
            c.- destination
unreachable
            d.- source
quench
            e.-
parameter problema
            f.- echo
reply

The
network administrator shown in the graphic can ping the E0 interface of the HAR
router, but the telnet intranet.xyz.com command issued from her
workstation fails to open a session with the intranet.xyz.com server. Which of
the following could cause this problem? (Choose two.)

            a.- upper-layer application
problems
            b.- domain name system
problems
            c.- IP
debugging problems
            d.- IP
routing problems
            e.- ICMP
connectivity problems

During
the lookup process when forwarding a packet, a router checks its routing table
for the best path to the destination. If a route has an administrative distance
of 0, what does this indicate to the router?

            a.- The
packet should be discarded.
            b.- The
destination is unreachable.
            c.- The destination is a directly
connected network.
            d.- The
source of the update for that route is unreliable.

Consider the RIP network shown in the diagram. Which
entries would be listed in the routing table of Router A?

            a.-
R 192.168.5.2[120/1]
via 192.168.15.0, 00:00:09,
Serial0
            b.- R 192.168.15.0[120/1] via 192.168.5.2, 00:00:13, Serial1
            c.- R 192.168.15.0[120/1] via 192.168.5.1, 00:00:13,
Serial0
            d.- R
192.158.5.1 [120/1] via 192.168.5.2 00:00:29,
Serial1
                 
R 192.168.15.0 [120/1] via 192.168.5.2,
00:00:29, Serial1
            e.- R 192.158.5.1 [120/1] via 192.168.5.2 00:00:18, Serial0
            
     R 192.168.15.2 [120/1] via 192.168.5.2, 00:00:18, Serial0


A network administrator suspects that a network is not
being included in the routing updates. Which command will provide information on
when the next update is due and which networks are advertised in the update?

            a.- Router#
show interfaces
            b.- Router#
show controllers serial
            c.- Router# show ip protocols
            d.- Router#
show ip route
            e.- Router#
show running-config

Which
items would be displayed when the show ip
protocol command is executed? (Choose three.)

            a.- sources of routing
updates
            b.-
networks being advertised
            c.- routing
protocol up or down
            d.-
configured routed protocols
            e.- Layer 2
status of the interface
            f.- update timer
values

Which
two are true regarding the output shown in the graphic? (Choose
two.)

            a.- Network
192.168.44.0 is 610 routers away from the source router
            b.- A packet destined for host
192.168.80.24 will be forwarded out the Serial0 interface.
            c.- The
subnet mask for the networks is 255.255.255.240.
            d.- The router is receiving IGRP
updates through its serial interface.
            e.- This
router is using three different routing protocols.

At which OSI layer does the routing of email packets from
the source network to the destination network occur?

            a.-
application
            b.-
session
            c.-
transport
            d.-
network

Refer to the network and routing table entries shown in the
graphic. What will happen when a packet destined for network 192.66.7.0 is
received by Router A?

            a.- It will be forwarded through
interface S1.            
            b.- It will
be forwarded to the default route.
            c.- It will
be directed toward the Internet.
            d.- It will
be discarded.

After
issuing the show interfaces serial1 command, an administrator notices an
increasing number of carrier transitions. What are the possible causes for this
increase? (Choose two.)

            a.- There
is an incorrect encapsulation configured on the interface.
            b.- There could be an
interruption in the line by the service
provider.
            c.- There
is a faulty switch or CSU/DSU.
            d.- There
is noise on the serial line.
            



After
issuing the show interfaces command, a technician notices the line
"Serial1 is down, line protocol is down" in the output. Which of the following
are possible reasons for this message output? (Choose
three.)

            a.- There
is a mismatch in the encapsulation type on both ends of the
link.
            b.- A Layer 1 issue
exists.
            c.- An
interface problem exists.
            d.- The
clockrate was not set during
configuration.
            e.- There is no usable media for
the protocol.
            f.- Keepalive messages are not being sent.

After
issuing the command traceroute
192.168.4.2 from Router A, the following information is returned.
Tracing
the route to Router_D (192.168.4.2)
1 Router_B (192.168.2.2) 16 msec 16
msec 16 msec
2 * * *
3
* * *
What
can be concluded about the network shown in the graphic based on the output
given?

            a.- Network
192.168.5.0 is missing from the routing table on Router A.
            b.- There is a problem with the
connection between Router B and Router C.
            c.- Router
C is not running CDP.
            d.- Some of
the routers are non-Cisco devices.
            e.- Router
B was not able to return ICMP TEMs to Router
A.

Which of the following commands can be used to statically
configure default routes? (Choose two.)

            a.- ip static-route
            b.- ip
route
            c.- ip network-route
            d.- ip
default-network
            e.- ip default-static

Which
of the following lines from the show interfaces output would indicate a
Layer 2 problem?

            a.- Serial1
is up, line protocol is up.
            b.- Serial1 is up, line protocol
is down.
            c.- Serial1
is down, line protocol is down.
            d.- Serial1
is administratively down, line protocol is down.
               
               
               

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