Which well-known port number is used by the DHCP (client) protocol?
Correct answer(s):
- 68
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A user needs to access the Internet from home. Which device is needed if a user connects to an ISP through the telephone network?
Correct answer(s):
- DSL modem
Which type of connection to the Internet is capable of the fastest transfer rates?
Correct answer(s):
- fiber
Which device provides wireless connectivity to users as its primary function?
Correct answer(s):
- access point
Which pairs of wires change termination order between the 568A and 568B standards?
Correct answer(s):
- green and orange
Which IEEE standard operates at wireless frequencies in both the 5 GHz and 2.4 GHz ranges?
Correct answer(s):
- 802.11n
What is the correct order of the layers of the TCP/IP model from the top layer to the bottom?
Correct answer(s):
- application, transport, internet, network access
What is a characteristic of a WAN?
Correct answer(s):
- It connects multiple networks that are geographically separated.
What is a common function of a proxy server?
Correct answer(s):
- to store frequently accessed web pages on the internal network
Which network device makes forwarding decisions based on the destination MAC address that is contained in the frame?
Correct answer(s):
- switch
How many devices can a Bluetooth device connect to simultaneously?
Correct answer(s):
- 7
A network specialist has been hired to install a network in a company that assembles airplane engines. Because of the nature of the business, the area is highly affected by electromagnetic interference. Which type of network media should be recommended so that the data communication will not be affected by EMI?
Correct answer(s):
- fiber optic
When would a printer be considered a network host?
Correct answer(s):
- when it is connected to a switch
Which two types of signal interference are reduced more by STP than by UTP? (Choose two.)
Correct answer(s):
- RFI
- EMI
Which two devices are commonly powered by PoE? (Choose two.)
Correct answer(s):
- access point
- IP phone
A customer is considering a multipurpose device to create a home network. Which three devices are usually integrated into a multipurpose network device? (Choose three.)
Correct answer(s):
- switch
- router
- wireless access point
An employee reports that the antivirus software cannot obtain updates. The support technician notices that the license for the software has expired. The technician adds a new license to the software and completes the update service. What should the technician do next?
Correct answer(s):
- Run a full virus scan on the computer.
What is a primary benefit of preventive maintenance on a PC?
Correct answer(s):
- It extends the life of the components.
A technician is performing hardware maintenance of PCs at a construction site. What task should the technician perform as part of a preventive maintenance plan?
Correct answer(s):
- Remove dust from intake fans.
What is the best way to determine if a CPU fan is spinning properly?
Correct answer(s):
- Visually inspect the fan when the power is on to ensure it is spinning.