What else, if anything, must you do to complete the job? A. Do nothing; the job has been successfully completed.
B. Install a terminator on the severed end of the bus trunk cable connecting workstations
1 through 5.
C. Install a terminator on the severed end of the bus trunk cable connecting workstations
6 through 10.
D. Install terminators on both severed end of the bus trunk cable. Answer: D
In a bus topology, the bus trunk cable must be terminated at both ends. Therefore you must install terminators
on both severed end of the bus trunk cable.
References:
David Groth and Toby Skandier, Network+ Study Guide (4th Edition), Sybex, Alameda CA, 2005, pp. 10-11.
QUESTION 158
You work as a network administrator at Testking.in. Testking.inhas a medium-sized network with
a mixture of different platform computers. The network contains multiple subnets located across a large
geographical area. Over half of the subnets contain a WAP (Wireless Access Point) for Internet access.
The users on a particular subnet complain of downtime. Upon further troubleshooting, you notice that
the each day the downtime lasts approximately an hour around midday. You realize that this period of
downtime is affecting wireless users only. You travel to the troubled subnet around midday and connect
using a wired workstation, but the wireless laptop will not connect. You notice that the WAP (Wireless
Access Point) in use is 802.11g. Which of the following would be an appropriate action to address this
problem?
A. Upgrade all affected computers to a uniform platform running in ad-hoc mode B. Eliminate any sources of RFI (Radio Frequency Interference) around the WAP
(Wireless Access Point)
C. During the affected time, connect the WAP (Wireless Access Point) directly into the
router
D. Change the WAP (Wireless Access Point) and all affected computers to operate in ad-
hoc mode
Answer: B
802.11g uses the 2.4 GHz range which is also used by appliances such as microwaves. The connectivity
problem occurs at around lunch time, which seems to indicate that the increased use of microwaves at around
this time is causing RFI (Radio Frequency Interference). We should thus attempt to eliminate this RFI.
Incorrect Answers:
A, D: In ad-hoc mode, two wireless devices can communicate directly, without the need for a WAP. However,
RFI (Radio Frequency Interference) will still affect the devices, making connectivity a problem.
C: Connecting the WAP directly to the router will not overcome the RFI (Radio Frequency Interference) that is
affecting the wireless signal.
References:
David Groth and Toby Skandier, Network+ Study Guide (4th Edition), Sybex, Alameda CA, 2005, pp. 251,
252, 255.
QUESTION 159
You work as an administrator at Testking.in. Testking.inhas two 100BASE-TX hubs, Hub A and
Hub B. The hubs are connected by a 3 meter (9.84.feet) straight-through patch cable. The hosts on Hub A
are unable to communicate with the hosts on Hub B. What can you do to resolve the problem?
B. Update all clients with Hub A as their default gateway
C. Replace the patch cable that connects Hub A to Hub B with a crossover patch cable D. Update clients on Hub A as their default gateway and update clients on Hub B as their
default gateway
Answer: C
The Ethernet connections on the two hubs are physically and electronically the same medium dependent
interface-crossover (MDI-X) port, therefore, you need a crossover cable to connect the two hubs, and not a
straight-though cable.
Incorrect Answers:
A: Switches are intelligent hubs. They perform the same function as hubs but reduce collisions by forwarding
packets only to the destination host rather than broadcasting packets to all connected hosts.
B, D: Hubs do not have IP addresses. They connect hosts on a single LAN and thus cannot serve as gateways.
References:
David Groth and Toby Skandier, Network+ Study Guide (4th Edition), Sybex, Alameda CA, 2005, pp. 57,
67-69, 290-292, 436-437.
QUESTION 160
You work as a network technician at Testking.in. You are troubleshooting a network problem using a
utility to capture network packets. When you review the captured data, you notice that you have only captured broadcast packets and packets from your own
computer. Why?
A. You do not have permission to capture other packets.
B. You are connected to a switch when trying to capture packets. C. The router is blocking the packets to the workstation.
D. You are using an evaluation copy of the software utility. Answer: B
QUESTION 161
What happens if the wrong WEP (Wired Equivalent Privacy) key is entered into a wireless device?
A. The network is accessible, but the data will be garbled. B. Data can be sent but not received.
C. The network is not accessible.
Answer: C
WEP requires that both the wireless computer and the WAP (wireless access point) be configured with the same
encryption key in order for the two to communicate. If one of the two has the wrong WEP key, communication
will not be possible and the network will not be accessible.
References:
David Groth and Toby Skandier, Network+ Study Guide (4th Edition), Sybex, Alameda CA, 2005, p. 254.
QUESTION 162
A Mac OS X 10.3 Kerberos user experiences an authentication failure when trying to access a kerberized
service provided by Mac OS X Server 10.3. Which of the following steps might resolve the issue?
A. Install Kerberos client software for Mac OS X 10.3 on the user's computer. B. Synchronize all Kerberos principal's clocks using a network time server. C. Ensure that the IP address of the user's computer to allow the user to access the
service.
D. All of the above. Answer: B
QUESTION 163
You work as a web master at Testking.in. The Testking.inwebsite is hosted on a Linux machine.
Users complain that they receive a forbidden error message when visiting the Testking.inweb site. You
log onto the Linux server and changes to the directory where the web site pages are stored. What should
you do NEXT?
A. Rename the webpage files B. Change the symbolic link
C. Change the web port to 8080 on the client D. Change the permissions of the directory Answer: D
Incorrect Answers:
A: Forbidden error messages are received when a client doesn't have permissions to access a web page.
B: The symbolic link indicates whether the connection is secure or not. It will not prevent a web page from
opening.
C: HTTP uses TCP port 80. Changing to port 8080 will prevent the client from accessing any web site.
QUESTION 164
You work as a network technician at Testking.in. There are three identical desktop computers on the
Testking.innetwork. However, one of the computers cannot connect to the other computers. You
check the network interface card in the problematic computer and find that neither the link light nor the
activity light is illuminated. You swap the network cable with a cable that is known to be operational, but
the lights still do not illuminate on the NIC or the corresponding port on the switch. What would be your
next troubleshooting step? A. Switch to a crossover cable. B. Reinstall the NIC.
C. Change ports on the switch. D. Enter the correct TCP/IP settings. Answer: C
Incorrect Answers:
A: A crossover cable is used if the two ports or interfaces are physically and electronically the same. However,
we are checking connectivity between a workstation and a switch. The NIC on the workstation has a medium
dependent interface (MDI) port while the switch has a medium dependent interface- crossover (MDI-X) port.
Therefore, we would use a straight-through cable and not a crossover cable to connect the two.
B: The first step in troubleshooting is always to isolate the problem. Thus far we have verified that the cable is
not the problem. The next logical step would be to check the port on the switch by connecting the cable to a
different port. If that does not resolve the problem then we can rightfully suspect that the problem lies with the
NIC.
D: The LED lights on the NIC and on the corresponding port on the switch are illuminated when there is
physical connectivity between the NIC and the switch. This connectivity is not dependent on the TCP/IP setting