DsmbISP Chapter 9 – CCNA Discovery: Working at a
Small-to-Medium Business or ISP (Version 4.1)
1. A user can access any web page on the Internet but
cannot access e-mail. What troubleshooting method would be most efficient for
troubleshooting this issue?
top-down
bottom-up
divide-and-conquer
impossible to determine from this information
2. Hosts on two separate subnets cannot communicate. The
network administrator suspects a missing route in one of the routing tables.
Which three commands can be used to help troubleshoot Layer 3 connectivity
issues? (Choose three.)
ping
show arp
traceroute
show ip route
show controllers
show cdp neighbor
3. Refer to the exhibit. Host H1 on the LAN is not able to
access the FTP server across the Internet. Which two configuration statements
are causing this problem? (Choose two.)
There is no route to the Internet.
The IP address on Fa0/0 is incorrect.
The IP address on S0/0/0 is incorrect.
The NAT command on the Fa0/0 interface is applied in the
wrong direction.
The NAT command on the S0/0/0 interface is applied in the
wrong direction.
4. Refer to the exhibit. Which three statements are true
about the output of the show ip interface brief command? (Choose three.)
FastEthernet0/0 is functioning correctly.
The shutdown command has been applied on Serial0/0.
FastEthernet0/0 was configured by the startup-config at
bootup.
Serial0/0 is experiencing a Layer 1 network problem.
FastEthernet0/1 is experiencing a Layer 2 network problem.
Because the port is down, Serial0/1 has an IP address that
does not show in the output.
5. A user is having trouble accessing the Internet. A
network administrator begins by verifying that the IP address of the PC is
correctly configured. Next the administrator pings the default gateway. Based
on this information, what type of troubleshooting method is the administrator
employing?
top-down
bottom-up
divide-and-conquer
impossible to determine from this information
6. Which two conditions identify issues that are confined
to Layer 1? (Choose two.)
cables that exceed maximum length
encapsulation errors
viruses and worms that create excessive broadcast traffic
poor termination of cables
receiving "line protocol down" messages on the router console
7. Refer to the exhibit. Users on the 10.12.10.0/24 network
are unable to access anyone on the 10.10.10.0/24 network. What two problems
exist in the network? (Choose two.)
R2 is using a different version of RIP.
R2 has a missing network statement.
R1 has an incorrect network statement.
R3 has an incorrect network statement.
A routing loop is occurring between all three routers.
8. Refer to the exhibit. Which statement is true regarding
the IP address configuration?
Interfaces Fa0/0 and Fa0/1 can be in the same subnet.
Interface Fa0/0 and NetworkA can be in the same subnet.
Interface Fa0/0 and NetworkB can be in the same subnet.
Interface Fa0/1 and NetworkB can be in the same subnet.
9. An ISP help desk technician receives a call from a
customer who reports that no one at their business can reach any websites or
get their e-mail. After testing the communication line and finding everything
fine, the technician instructs the customer to run nslookup from
the command prompt. What does the technician suspect is causing the customer’s
problem?
improper IP address configuration on the host
hardware failure of the ISR used to connect the customer to
the ISP
bad cables or connections at the customer site
failure of DNS to resolve names to IP addresses
10. Refer to the exhibit. The PC is trying to ping router B
at 192.168.2.2, but it fails. What is the problem?
The PC is on the wrong subnet.
The default gateway on the PC should be 192.168.1.1.
The default gateway should be 192.168.2.2.
The DNS server is incorrect.
The IP address for Fa0/0 on router A is incorrect.
11. Which problem is associated with Layer 4 of the OSI
model?
A firewall is blocking Telnet packets to a host.
A host has an incorrect IP address.
A router has no route to a host.
A host sent a malformed HTTP request.
12. How many usable host addresses does the 192.168.1.0/25
subnet provide?
254
128
127
126
64
62
13. An administrator is creating a lab to simulate a WAN
connection. During the setup, the administrator notices that there are
different encapsulation types on each end of the serial connection. At what
layer of the OSI model is this problem occurring?
Layer 2
Layer 4
Layer 5
Layer 6
14. Refer to the exhibit. Which IP address is misconfigured
and is causing connectivity problems between hosts and servers?
HostA
HostB
Server1
Server2
R1 Fa0/0
R1 Fa0/1
15. A network technician has isolated a problem at the
transport layer of the OSI model. Which question would provide further
information about the problem?
Do you have a firewall that is configured on your PC?
Do you have a link light on your network card?
Is your PC configured to obtain addressing information
using DHCP?
What default gateway address is configured in your TCP/IP
settings?
Can you ping ccnaanswers.com?
16. A PC is able to reach devices that are located both
inside and outside the network. However, when trying to reach an FTP server
that is located on the same subnet, the PC fails to make a connection. The
administrator has several other PCs that are located in the same subnet try a
connection to the FTP server and they are successful. Which troubleshooting
tool can be used to determine the problem between the PC and the FTP server?
cable tester
digital multimeter
protocol analyzer
network analyzer
17. A network administrator is upgrading a Cisco 1841
router by adding a WIC-2T module card. Which show command can
the administrator use to verify that the module is correctly recognized by the
router?
show flash:
show version
show ip route
show startup-configuration
18. A network administrator plugs a new PC into a switch
port. The LED for that port changes to solid green. What statement best
describes the current status of the port?
There is a duplex mismatch error.
There is a link fault error. This port is unable to forward
frames.
The port is operational and ready to transmit packets.
This port has been disabled by management and is unable to
forward frames.
The flash memory is busy.
19. Refer to the exhibit. A network administrator is in the
process of sending a preconfigured text file to a router. When the
administrator pastes the configuration into the router, an error message
appears. What is the problem with the IP addressing scheme?
Serial0/0 is configured with a network address.
The IP address on FastEthernet0/0 overlaps with the IP on
FastEthernet0/1.
Serial0/1 is configured with a broadcast address.
The IP address on FastEthernet0/0 overlaps with the IP on
Serial0/1.
20. Refer to the exhibit. What are two possible causes for
the interface status? (Choose two.)
The loopback address is not set.
The encapsulation type is mismatched.
A cable is not attached to the interface.
Keepalive messages are not being received.
The interface is administratively shut down.
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