Which network protocol is used to automatically assign an IP address to a computer on a network?
Correct answer(s):
- DHCP
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Port triggering has been configured on a wireless router. Port 25 has been defined as the trigger port and port 113 is an open port. What effect does this have on the network traffic?
Correct answer(s):
- All traffic that is sent out to port 25 will open port 113 to allow inbound traffic into the internal network through port 113.
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?
Correct answer(s):
- The computer cannot communicate with a DHCP server.
A group of users is unable to connect to the network. When testing several of the PCs and issuing the command ipconfig, the technician notices that all of them have an IP address in the 169.254.x.x range. What is the most likely cause of this problem?
Correct answer(s):
- The DHCP server is not operational.
What security technique could provide secure access to a server located in a small office without the expense of implementing a DMZ or purchasing a hardware firewall?
Correct answer(s):
- implement port forwarding
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?
Correct answer(s):
- The network cable is faulty.
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?
Correct answer(s):
- ipconfig/renew
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 to IP configuration of workstations. Which service would simplify the workstation IP configuration task?
Correct answer(s):
- DHCP
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?
Correct answer(s):
- 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?
What two default wireless router settings can affect network security? (Choose two.)
Correct answer(s):
- The SSID is broadcast.
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.)
Correct answer(s):
- default gateway
- subnet mask
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.)
Correct answer(s):
- Disable DHCP.
- Assign static IP addresses to the authorized devices.
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 that there is no evidence of unauthorized users on the network. Which two problems might the technician suspect? (Choose two.)
Correct answer(s):
- There is interference from outside sources.
- The wireless signal is too weak.
A technician is searching through a storage locker and finds a repeater. What is the purpose of this device?
Correct answer(s):
- It is used to regenerate weak signals to extend the distance a signal can travel.
A technician is searching through a storage locker and finds a patch panel. What is the purpose of this device?
Correct answer(s):
- It provides a wired or wireless connection between end devices, switches, and routers and in some cases, can regenerate weak signals.
A technician is searching through a storage locker and finds a Cisco ASA 5505-X (UTM). What is the purpose of this device?
Correct answer(s):
- It is an all-in-one security appliance that includes IDS/IPS functionality as well as stateful firewall services.
A technician is searching through a storage locker and finds a wireless NIC. What is the purpose of this device?
Correct answer(s):
- It is needed to connect a computer or smart device to an 802.11 network.
A technician is searching through a storage locker and finds an Ethernet NIC. What is the purpose of this device?
Correct answer(s):
- It is needed to connect a computer to a wired local-area network.
Which device acts as a termination point for cable runs and keeps cables secure and safely out of walkways?
Correct answer(s):
- patch panel
What type of connector is used to connect an analog modem to a telephone line socket?
Correct answer(s):
- RJ-11