Chapter 7 Quiz Wireless and SOHO Network

You are setting up a wireless network. Which wireless standards would give the users over 40 Mbps throughput? (Choose all that apply.) A. 802.11ac B. 802.11b C. 802.11g D. 802.11n

802.11ac, 802.11g, 802.11n Explanation: Three standards listed—802.11ac (1,300 Mbps), 802.11g (54 Mbps), and 802.11n (600 Mbps)—give users the required throughput. 802.11ax would do so as well, although it's not an option.

You have just installed a wireless router on your home network. Which of the following should you do to make it highly secure? (Choose all that apply.) A. Change the default administrator name and password. B. Change the SSID. C. Enable WEP. D. Configure it to channel 11.

Change the default administrator name and password. Change the SSID. Explanation: You should always change the default administrator name and password as well as the default SSID when installing a new wireless router. Enabling encryption is also a good idea, but WPA, WPA2, and WPA3 are better options than WEP. The channel has nothing to do with security.

When enabled, which feature of a wireless router allows only specified computers to access the network? A. Port forwarding B. WPS C. SSID D. MAC filtering

MAC filtering Explanation: MAC filtering is a security option that can specify that only computers with specific MAC (hardware) addresses can access the network. Port forwarding is a feature of firewalls. WPS is an easy setup mechanism for wireless networks. SSID is the wireless network name.

Which of the following technologies can operate in the 125 kHz to 134 kHz range? A. Bluetooth B. RFID C. NFC D. LTE

RFID Explanation: Radio frequency identification (RFID) can operate in three frequency bands: 125 kHz to 134 kHz, 13.56 MHz, or 856 MHz to 960 MHz. Bluetooth is 2.4 GHz, NFC is 13.56 MHz, and LTE is between 600 MHz and 6 GHz.

A firewall operates by using a set of rules known as what? A. SLA B. ACL C. NAT D. APIPA

ACL Explanation: The set of rules for access on a firewall is called an access control list (ACL). An SLA is an agreement on service level for QoS. NAT translates private IP addresses into public ones. APIPA assigns an IP address to a client that can't reach the DHCP server.

Due to channel interference, you are upgrading a wireless network from Wi-Fi 5 to Wi-Fi 6. Which feature of Wi-Fi 6 reduces channel interference? A. OFDMA B. BSS coloring C. MU-MIMO D. DFS

BSS coloring Explanation: The feature of Wi-Fi 6 that reduces channel interference is Basic Service Set (BSS) coloring, which adds a field to the wireless frame that distinguishes it from others. Orthogonal Frequency Division Multiple Access (OFDMA) is a modulation technique that improves speed because it allows transmission to multiple clients at once. MU-MIMO also increases speed because in Wi-Fi 6 it works for uplink connections as well as downlink ones. Dynamic Frequency Selection (DFS) was introduced with 802.11n, and it detects radar interference and adjusts frequencies accordingly.

Which of the following are features that allow 802.11ac to achieve higher data throughput? (Choose two.) A. MIMO B. Beamforming C. Channel bonding D. Code division multiplexing

Channel bonding, MIMO Explanation: The two technologies that 802.11ac employs to achieve high throughput are channel bonding and MIMO. Channel bonding is the combination of multiple smaller channels into one large channel for greater bandwidth. MIMO is enhanced over 802.11n to allow for multiple inputs and outputs. 802.11ac also uses beamforming, but that helps the range, not the throughput.

You are upgrading a wireless network from Wi-Fi 5 over to Wi-Fi 6. Which of the following statements is not correct? A. Users should get faster speeds. B. Network range will be similar. C. Fewer users will be able to use each access point. D. Devices may have lower power usage while connecting to the network.

Fewer users will be able to use each access point. Explanation: Wi-Fi 6 is faster than Wi-Fi 5, and the network range is similar. More users should be able to access each access point, not fewer. Devices may have lower power usage in Wi-Fi 6 due to a new sleep feature.

Besides 802.11 standards, which wireless communication methods may also work in the 2.4 GHz range? (Choose all that apply.) A. Bluetooth B. Satellite C. Long-range fixed wireless D. mmWave E. NFC

Long-range fixed wireless, Bluetooth Explanation: Bluetooth also operates in the 2.4 GHz range, and long-range fixed wireless can if it uses unlicensed frequencies. Satellite uses satellite waves; 5G cellular mmWave is between 24 GHz and 86 GHz, and NFC uses 13.56 MHz.

Which service allows users with private IP addresses to access the Internet using a public IP address? A. DHCP B. DNS C. DSL D. NAT

NAT Explanation: Network Address Translation (NAT) allows users to have a private IP address and still access the Internet with a public IP address. NAT is installed on a router and translates the private IP address into a public address for the user to access the Internet. DHCP assigns IP configuration information to clients. DNS resolves hostnames to IP addresses. DSL is a type of broadband Internet access.

You have set up a wireless router on your network and configured it to use AES. What configuration option do you need to choose on the client computers? A. WEP B. WPA C. WPA2 D. TKIP

WPA2 Explanation: If your router is using AES, the clients need to use WPA2. TKIP is a protocol utilized by WPA. WEP is the weakest of the encryption options.

Which of the following is the most secure wireless encryption standard for 802.11 networks? A. WEP B. WPA C. WPA2 D. SAFER+

WPA2 Explanation: WEP was the original encryption standard developed for Wi-Fi networks, but it is easily hacked. WPA is an upgrade, but WPA2 is more secure and incorporates the entire 802.11i standard. WPA3 is of course the safest, but it's not one of the options. SAFER+ is used to encrypt Bluetooth communications.

Which of the following wireless IEEE standards operate on the 2.4 GHz radio frequency and are directly compatible with each other? (Choose two.) A. 802.11a B. 802.11b C. 802.11ac D. 802.11g

802.11b, 802.11g Explanation: Both 802.11b and 802.11g operate in the 2.4 GHz range and use similar transmission standards. Some legacy devices are listed as 802.11b/g, meaning they will work with either system. Alternatively, 802.11a and 802.11ac operate in the 5 GHz range.

You are running an 802.11g wireless router in mixed mode. You have three 802.11g wireless NICs using the router. A new user connects using an 802.11b wireless NIC. What will happen? A. The user with 802.11b will access the network at 11 Mbps, while the users with 802.11g will access the network at 54 Mbps. B. The user with 802.11b will not be able to communicate on the network. C. The user with 802.11b will access the network at 11 Mbps. The users with 802.11g will access the network at 54 Mbps, unless they are communicating with the 802.11b device, which will be at 11 Mbps. D. All users will access the network at 11 Mbps.

All users will access the network at 11 Mbps. Explanation: The good news is that 802.11g is backward compatible with 802.11b. The bad news is, if you run in a mixed environment, all devices that communicate with the WAP (or router) will be forced to slow down to accommodate the older technology.

You are setting up a small office network for a client. Which Internet service would you recommend to provide the best speed? A. DSL B. Cable C. Satellite D. Fiber

Fiber Explanation: Of the options listed, fiber provides the best speed. DSL and cable provide similar speeds but can't match fiber. Satellite is the slowest of the options listed.

You are configuring a SOHO client to use TCP/IP. Which parameter is needed to tell the client where to communicate to get on the Internet? A. Static address B. Dynamic address C. APIPA D. Gateway

Gateway Explanation: The gateway, also known as a default gateway, is the address to the router to take a client to the next network (or Internet). Gateways can be configured with a static assignment or dynamically through a DHCP server. APIPA will automatically configure a client with IP address information if it's set to get its configuration from a DHCP server but none is available. APIPA-configured clients can't get on the Internet.

Which of the following security standards was the first to introduce a dynamic 128-bit per-packet security key? A. WEP B. TKIP C. AES D. CCMP

TKIP Explanation: WEP could use a 64-bit or 128-bit security key, but it was a static key. TKIP introduced a dynamic per-packet key. AES and CCMP came after TKIP.

You have been asked to configure a network for a small office. The wireless router is installed, and now you need to connect the client computers. What do you enter on the client computers to connect to the router? A. The administrator password B. The security passphrase C. The client's MAC address D. The default router password

The security passphrase Explanation: To join the network, client computers need to find the SSID, ensure that the security settings are correct (to match the router), and enter the security passphrase. As an administrator, you should have configured this passphrase to be different from the router's administrator password.

What is the primary function of the SSID? A. To secure communication between a web server and a browser B. To secure communication between a server and a remote host C. To serve as a parameter used to identify a network and configure a wireless connection D. To serve as a type of password used to secure a wireless connection

To serve as a parameter used to identify a network and configure a wireless connection. Explanation: A service-set identifier (SSID) is the unique name given to the wireless network. All hardware that is to participate on the network must be configured to use the same SSID. Essentially, it is the network name. When you are using Windows to connect to a wireless network, all available wireless networks are listed by their SSID.

You are installing a single 802.11g wireless network. The office space is large enough that you need three WAPs. What channels should you configure the WAPs on to avoid communication issues? A. 2, 5, and 7 B. 1, 8, and 14 C. 1, 6, and 11 D. 3, 6, and 9

1, 6, and 11 Explanation: There are 14 communication channels in the 2.4 GHz range, but only the first 11 are configurable. The three nonoverlapping channels are 1, 6, and 11.