ITN 106 CompTIA A+ 1002 CH. 3

A client is requesting an Internet connection type that is not affected by atmospheric conditions and is always on. Which of the following will meet these requirements? a. Cable b. Dial-up c. Satellite d. Cellular hotspot

A

Your company shares a building with a competitor's branch office. Recently, you noticed that some computers other than your company computers have tried to connect to the wireless network unsuccessfully. When you are in the parking lot, you also notice that the company's wireless network SSID can be seen on your smartphone. What can you do to make sure no one outside your company can gain access to its wireless network? (Select all that apply.) a. Disable SSID broadcasting. b. Lower radio power levels. c. Add access points. d. Enable MAC filtering. e. Set up firewall settings.

A, B, D

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. a. Verify that the wireless connection is using the fastest wireless standard the router supports. b. Disable encryption on the wireless network to speed up transmissions. c. Suggest the son use a wired Gigabit Ethernet connection to the network. d. Enable QoS for the gaming applications on the router and on the son's computer.

A, C, D

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? a. Dial-up b. LTE installed Internet c. DSL d. Cable Internet

B

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? a. Yes, because Ethernet is faster than 802.11ac. b. Yes, because wired connections are always faster than wireless connections. c. No, because installing Ethernet cabling is more expensive than the increased speed is worth. d. No, because 802.11ac speeds are faster than Ethernet.

D

the average of the actual speed of a network

Data throughput

True or False Latency is measured by the round-trip time it takes for a message to travel from source to destination

Fales, Latency is measured by the round-trip time it takes for a message to travel from source to destination and back to source.

these networks cover a small area (i.e., a home, or small office). LANs can use either wired (Ethernet) or wireless (WIFI) technologies.

LAN (Local Area Network)

delays that result in slower network performance

Latency

these networks cover multiple buildings in a large campus or portion of a city. Network technologies on these networks can be wireless (likely LTE) or wired (likely fiber optic or ethernet)

MAN (Metropolitan Area Network)

these networks consist of personal devices (i.e., phones, wireless speakers, laptops) communicating at close range

PAN (Personal Area Network)

these networks consist of many wireless devices communicating directly with each other rather than a central device (like a switch or router). Some (or all) of the devices on the network serve as connection points; this allows other devices to communicate across long distances.

WMN (Wireless Mesh Network)

When is a computer network created?

When two or more computers can communicate with each other

what is the best known WAN?

the internet

A technician is configuring a new SOHO multifunction wireless router at a customer's location to provide network access to several wireless devices. The technician is required to protect the customer's private network from unauthorized access while performing the initial router setup as well as during normal operation after the configuration is completed. Which of the following is the best step for the technician to take in securing the router to meet this requirement? a. Enable DHCP on the router and configure IP address reservations for the wireless clients. b. Change the router's default administrative password. c. Disable the router's radio in the wireless network settings. d. Configure MAC filtering on the router and allow access to only the technician's computer.

B

Which of the following is a scenario in which an IT support technician would most likely be required to implement the alternate IP configuration method on a network host? a. To ensure a workstation receives the same IP address from the DHCP server each time the workstation is booted. b. In the event a DHCP server is unavailable, the workstation will have a valid IP address on the subnet. c. When a workstation requires that more than two different DNS server IP addresses be configured for a specific network interface. d. To assign a secondary DNS server IP address to a specific network interface on the workstation.

B

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? a. Has IPv6 addressing been enabled? b. Is the computer using dynamic or static IP addressing? c. Do the lights on the adapter indicate it's functioning correctly? d. Has the computer been assigned a computer name?

B, C

Which of the following 802.11 wireless networking standards support transfer rates of over 54 Mbps? a. 802.11a b. 802.11ac c. 802.11g d. 802.11b e. 802.11n

B, E

the theoretical number of bits that can be transmitted over a network connection at one time, similar to the number of lanes on a highway.

Bandwidth

You are setting up your Windows computer to connect to the Internet and notice that when you type www.microsoft.com, the browser does not go to the site. Instead, you receive an error message saying that the address cannot be resolved. What network setting should you check to see the address of the server being used to resolve this address? a. IP address b. Subnet mask c. DNS d. Gateways

C

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? a. net command b. netstat command c. Network and Sharing Center d. Network Connections window

C

A group of wireless devices are using each other as relays to share a network connection across a large area. Which of the following network categories is being used? a. PAN b. WLAN c. MAN d. WMN

D

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? a. PAN b. WAN c. WMN d. LAN

D

Henry is troubleshooting a network connection and wants to see if he can connect to the server on his network. Which Microsoft command-line command should Henry use to check whether he can connect to the server? a. ipconfig b. netstat c. ifconfig d. ping

D

You are tasked with configuring a wireless SOHO router for a customer. Which of the following settings will be the most secure with the least effort and cost to the customer? a. WPA2-Enterprise b. WPA-PSK, TKIP c. WPA2-PSK, TKIP d. WPA2-PSK, AES

D

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? a. The ISP's DNS server b. The local network's DHCP server on the SOHO router c. The cable modem d. The local computer

D

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? a. WWAN using the Network Connections window b. Dial-up using the Network and Sharing Center c. Ethernet using the Network Connections window d. VPN using the Network and Sharing Cente

D

these networks cover a large geographical area and they are made up of many smaller networks.

WAN (Wide Area Network)