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Which network protocol is used to automatically assign an IP address to a computer on a network?

• • APIPA

• • DHCP

• • ICMP

• • SMTP

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.

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 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

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

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

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

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.

Users in a recently installed wireless network are complaining of slow data transfer and frequent loss of connectivity. The technician checks that the wireless security is correctly implemented, and there is no evidence of unauthorized users on the network. Which two problems might the technician suspect? (Choose two.)

• • The network passwords need to be reissued to the users.

• • The wireless signal is too weak.

• • The antenna on the access point is too powerful.

• • The DHCP server is faulty.

• • There is interference from outside sources.

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.