It essentials Chapter 6

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)

• There is interference from outside sources.

• The DHCP server is faulty.

• The wireless signal is too weak.

• The antenna om the access point is too powerful.

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

A wired network is undergoing several changes that could leave it vulnerable to connection by unauthorized devices while the work is in progress. Which two temporary measures would enable the authorized devices to continue to have network access but prevent unauthorized devices from connecting? (Choose Two)

• Disable DNS

• Disable SSID broadcast

• Disable DHCP

• Subnet the network

• Assign static IP addresses to the authorized devices.

What two default wireless router settings can affect network security? (Choose two)

• The SSID is broadcast.

• MAC address filtering is enabled.

• WEP encryption is enabled.

• The wireless channel is automatically selected.

• A well-known administrator password is set.

A network technician is checking a computer to see if the DHCP client is working correctly. The technician issues the ipconfig/all command. Which two parameters should the technician review? (Choose Two)

• Description

• Default Gateway

• Host name

• Media state

• Subnet mask

A technician is troubleshooting a problem where the user claims access to the Internet is not working, but there was access to the Internet the day before. Upon investigation, the technician determines that the user cannot access the network printer in the office either. The network printer is on the same network as the computer. The computer has 169.254.100.88 assigned as an IP address. What is the most likely problem?

• The computer cannot communicate with a DHCP server.

• The IP default gateway on the computer is incorrect.

• The network interface card driver needs to be updated.

• The router that connects this network to other networks is down

A user can print to a printer that is on the same network, but the traffic of the user cannot reach the Internet. What is a possible cause of the problem?

• The PC default gateway address is missing or incorrect.

• The PC has an incorrect IP address.

• The network cable connected to the user PC is faulty.

• The NIC on the PC is faulty.

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?

• Any traffic that comes into port 25 allows outgoing port 113 to be used.

• 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.

• All traffic that is sent out port 25 will open port 113 to allow inbound traffic into the internal network through port 113.*

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 gateway needs to be fixed.

• The network cable is faulty.

• The network switch is faulty.

• The PC has an incorrect IP address for the DNS server.

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

A technician troubleshooting a network problem has used CLI commands to determine that a computer has not been allocated a correct IP address from the DHCP server. Which command can the technician use to solve this problem?

• ping

• ipconfig/release

• tracert

• ipconfig/renew*