Syngress - Eleventh Hour Network+ Exam N10-004 Study Guide (11 ...

Network Devices 53
5. You are the administrator of a small business network. You notice that as
you add workstations to the network over time the speed of the network
decreases; what devices would you replace in your network with what other
device to resolve this problem
A. Replace repeaters with hubs.
B. Replace routers with hubs.
C. Replace routers with switches.
D. Replace hubs with switches.
Answers
1. Correct answer and explanation: D. Install a switch to increase the distance
that data can travel along the cable. Switches can perform the same
functions that repeaters used to by regenerating the data so that it is sent
out from the switch at its original strength.
Incorrect answers and explanations: A, B, and C. Answer A is incorrect
because removing the cabling and replacing it with another kind is not
only costly, but a considerable amount of work. Answer B is incorrect
because a passive hub won’t regenerate the data when it is sent out from
its ports. Answer C is incorrect because an NIC is used as an interface to
communicate on the network. It isn’t used as a means of regenerating data
so that the network can be extended.
2. Correct answer and explanation: D. The packet will not be sent. Without
that default gateway, you are stuck on the local network. The subnet mask,
which you will learn about in the next chapter, is also very important. Without
a properly configured subnet mask to determine which subnet your
computer is on, your computer will be unable to communicate outside
the local network.
Incorrect answers and explanations: A, B, and C. Answer A is incorrect
because the PC will not know the addresses of the routers to send the data
packets to or even inquire about router addresses or destination addresses.
Answer B is incorrect for the same reason. Answer C is incorrect because the
DNS server is used for name-to-IP address resolution and not IP addresses
of routers.
3. Correct answer and explanation: A. Replace all 10 Mbps network adapters
to 10/100 Mbps in the remaining workstations. Because the switch ports
are configured to automatically sense the network speed, the workstations
with 100 Mbps network adapters will communicate with the switch
at 100 Mbps and others at 10 Mbps. This will affect the overall network
speed. To have a complete 100 Mbps network, you should replace the
10 Mbps adapters with 10/100 Mbps network adapters in the remaining
workstations.
Incorrect answers and explanations: B, C, and D. Answer B is incorrect
because even if the switch ports are configured to operate at 100 Mbps,