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MODULE 16 CONFIGURE NETWORK AND DEVICE SECURITY
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MODULE 16 CONFIGURE NETWORK AND DEVICE SECURITY
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MODULE 16 CONFIGURE NETWORK AND DEVICESECURITY
1. Which network protocol is used to automatically assign an IP address to a computer
on a network?
APIPA
DHCP
ICMP
SMTP
FTP
DHCP
Explanation: A Dynamic Host Configuration Protocol (DHCP) server automatically
assigns IP addresses, simplifying the addressing process. FTP manages file transfers.
SMTP sends email. ICMP is a messaging protocol that is used in troubleshooting.
APIPA is Automatic Private IP Addressing, a Windows operating feature that allows
DHCP clients to obtain addresses even when a DHCP server is not present.
After having talked to the customer, a network technician suspects that an invalid IP
address is the most likely cause of a network issue. Which step of the troubleshooting
process does this represent?
Identify the problem.
Establish a plan of action to resolve the problem and implement the solution.
Establish a theory of probable cause.
Test the theory to determine the cause.
Establish a theory of probable cause.
Explanation: Before a solution can be proposed or tested, the technician has to first talk
to the customer to identify the problem, and establish a theory of probable cause.
,A PC is not able to connect to a wired network. Pinging the loopback address is
successful, but the gateway cannot be reached. On the network switch all the interface
lights are on, except for the interface connected to the PC. The LED on the network
card is off. What is the most likely cause of this problem?
The network cable is faulty.
The network switch is faulty.
The PC has an incorrect IP address for the DNS server.
The gateway needs to be fixed.
The network cable is faulty.
Explanation: The network card is working if the loopback address can be pinged. The
LED on the network card being off points towards a faulty cable or a bad connection.
The current IP configuration of a small company is done manually and is time-
consuming. Because of increased network growth, a technician needs a simpler way for
IP configuration of workstations. Which service would simplify the workstation IP
configuration task?
APIPA
DHCP
DIPS
ICMP
DHCP
Explanation: In networks with more than a few hosts, DHCP simplifies the addressing
process. A DHCP server automatically assigns host IP addresses.
Which filtering method uses the physical address to specify exactly which device is
allowed or blocked from sending data on a network?
port triggering
MAC address filtering
,port forwarding
whitelisting
MAC address filtering
Explanation: MAC address filtering specifies exactly which device MAC addresses are
allowed to or blocked from sending data on your network.
Which IPv6 address represents the most compressed form of the IPv6 address
2001:0db8:cafe:0000:0835:0000:0000:0aa0/80?
2001:db8:cafe:0000:0835::aa0/80
2001:0db8:cafe:0000:0835::0aa/80
2001:db8:cafe:0:835::aa0/80
2001:db8:cafe::0835::aa0/80
2001:0db8:cafe:0000:0835::0aa0/80
2001:db8:cafe:0:835::aa0/80
Explanation: There are two rules that exist to help in the reduction of the number of
digits within an IPv6 address: Rule 1 is used to remove any leading 0s. After applying
rule 1 to 2001:0db8:cafe:0000:0835:0000:0000:0aa0/80, we calculate the outcome as
2001:db8:cafe:0:835:0:0:aa0/80. Rule 2 is used to replace any group of consecutive
zeros once throughout the IPv6 address. After applying rule 2 to
2001:db8:cafe:0:835:0:0:aa0/80, we calculate the outcome as
2001:db8:cafe:0:835::aa0/80.
A technician is configuring the channel on a wireless router to either 1, 6, or 11. What is
the purpose of adjusting the channel?
to enable different 802.11 standards
to disable broadcasting of the SSID
to provide stronger security modes
, to avoid interference from nearby wireless devices
to avoid interference from nearby wireless devices
Explanation: Channels 1, 6, and 11 are selected because they are 5 channels apart.
thus minimizing the interference with adjacent channels. A channel frequency can
interfere with channels on either side of the main frequency. All wireless devices need
to be used on nonadjacent channels.
Multiple users report that the workstations are assigned a 169.254.x.x IP address. The
users are able to communicate only between each other. What is a possible solution?
Verify the network cable on all user machines.
Statically configure a default gateway on each workstation.
Restart the DNS server.
Restart the DHCP server.
Restart the DHCP server.
Explanation: When a network device automatically obtains the IP address 169.254.x.x,
it is unable to receive an IP address from a DHCP server. The DHCP server should be
restarted to ensure that it is operational.
Port triggering has been configured on a wireless router. Port 25 has been defined as
the trigger port and port 113 as an open port. What effect does this have on network
traffic?
All traffic that is sent out port 25 will open port 113 to allow inbound traffic into the
internal network through port 113.
All traffic that is sent into port 25 to the internal network will also be allowed to use port
113.
Any traffic that is using port 25 going out of the internal network will also be allowed to
transmit out port 113.
Any traffic that comes into port 25 allows outgoing port 113 to be used.
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