CompTIA A+ Guide to IT Technical Support Chapter 7 Questions
While you work on the customer's printer, he continues chatting about his network and problems he's been experiencing. One complaint is that his Internet service slows down considerably in the evening. You suspect you know the cause of this problem: His neighbors arrive home in the evening and bog down the ISP's local infrastructure. To be sure, you take a quick look at the back of his modem. What type of cable connected to the WAN port would confirm your suspicions and why?
Coaxial, it would indicate that he has cable internet.
You have just finished installing a network adapter and booted up the system, installing the drivers. You open File Explorer on a remote computer and don't see the computer on which you installed the new NIC. What is the first thing you check? The second thing?
Do the lights on the adapter indicate it's functioning correctly? Is the computer using dynamic or static IP addressing?
As an IT technician, you arrive at a customer's home office to troubleshoot problems he's experiencing with his printer. While questioning the customer to get an understanding of his network, you find that he has a new Wi-Fi router that connects wirelessly to a new desktop and two new laptops, in addition to multiple smartphones, tablets, and the network printer. He also has several smart home devices, including security cameras, light switches, door locks, and a thermostat supported by an IoT controller hub. To work on the printer, which type of network will you be interacting with?
LAN
A friend of yours is having trouble getting good Internet service. He says his house is too remote for cable TV—he doesn't even have a telephone line to his house. He's also really frustrated with satellite service because cloudy skies or storms often disrupt the signal. You ask him what provider he uses for his cell phone. He says he has Verizon for his cell, which gets a good signal at his house. What Internet service will you recommend he look into getting for his home network?
LTE installed internet
You need a VPN to connect to a private, remote network in order to access some files. You click the network icon in your taskbar to establish the connection, and realize there is no VPN option available on the menu. What tool do you need to use to fix this problem?
Network and Sharing Center
You're troubleshooting a network connection for a client at her home office. After pinging the net- work's default gateway, you discovered that the cable connecting the desktop to the router had been damaged by foot traffic and was no longer providing a reliable signal. You replaced the cable, this time running the cable along the wall so it won't be stepped on. What do you do next?
Ping the router again to make sure the problem was fixed.
Describe two different methods of opening the Network and Sharing Center in Windows 10.
Right click on the network icon in the tool bar and click Network and Sharing Center, or open Control Panel and click Network and Sharing Center.
You run the ipconfig command on your computer, and it reports an IP address of 169.254.75.10 on the Ethernet interface. Which device assigned this IP address to the interface?
The local computer
You've just received a call from Human Resources asking for assistance with a problem. One of your company's employees, Renee, has recently undergone extensive surgery and will be homebound for 3-5 months. She plans on working from home and needs a solution to enable frequent and extended access to the company network's resources. Which WAN technology will you need to configure for Renee and which tool will you use to configure it?
VPN using the Network and Sharing Center
You have just installed a SOHO router in a customer's home and the owner has called to say his son is complaining that Internet gaming is too slow. His son is using a wireless laptop. Which possibilities should you consider to speed up the son's gaming experience? Select all that apply.
Verify that the wireless connection is using the fastest wireless standard the router supports. Suggest the son use a wired Gigabit Ethernet connection to the network. Enable QoS for the gaming applications on the router and on the son's computer.
Your customer then asks you if it would be worth the investment for him to have Ethernet cabling installed to reach each of his workstations, instead of connecting them by Wi-Fi to his network. Specifically, he wants to know if that would speed up communications for the workstations. You examine his router and find that it's using 802.11ac Wi-Fi. Would you advise him to upgrade to Ethernet? Why or why not?
Yes, because wired connections are always faster than wireless connections.
You're setting up a Minecraft gaming server so that you and several of your friends can share a realm during your gameplay. To do this, your friends will need to access your server over the Internet, which means you must configure your router to send this traffic to your game server. Which router feature will you use and which port must you open?
You'll need to use port forwarding and open port 25565
In this chapter, you learned how to set a static IP address in Windows. Most Linux OSs allow these set- tings to be changed from the command line. Search online to see how to do this. What Linux command is used to set the interface to a static IP address?
ifconfig
Your boss has asked you to configure a DHCP reservation on the network for a Windows computer that is used to configure other devices on a network. To do this, you need the computer's MAC address. What command can you enter at the command line to access this information?
ipconfig /all
While troubleshooting an Internet connection problem for your network, you restarted the modem and then the router. The router is now communicating with the Internet, which you can confirm by observ- ing the blinking light on the router's WAN indicator. However, now your laptop is not communicating with the router. Order the commands below to fix the problem and confirm connectivity.
ipconfig release, ipconfig /renew, ping, nslookup microsoft.com
