Networking Basics One
Networking Basics Two
Network Basics Three
Wired and Wireless Networking One
Wired and Wireless Networking Two
200

Multiple computers configured to be able to communicate and share information with each other form a ____________.?

a. Group

b.  Network

b.  Network

Whenever two or more computers are configured to share information with each other, they're called a network.

200

Which of the following is a wired networking method most commonly used today by desktop PCs and other network devices to connect to a local area network? 

a.  Ethernet 

b.  802.11n 

a.  Ethernet 

Ethernet is a wired, local area network (LAN) standard. Most laptops and desktop computers have built-in Ethernet network ports

200

Which of the following is the best device to deploy to protect your private network from an untrusted public network? 

a.  Firewall

b.  Router

a.  Firewall

A firewall is the best device to deploy to protect your private network from an untrusted public network. Firewalls are used to control traffic entering and leaving your trusted network environment. Firewalls can manage traffic based on source or destination IP address, port number, service protocol, application or service type, user account, and even traffic content. Routers offer some packet-based access control but not as extensive as that of a full-fledged firewall. Hubs and gateways are not sufficient for managing the interface between a trusted and an untrusted network.

200

Which of the following features is supplied by WPA2 on a wireless network? (Select two.) 

a. Encryption

b. Identification of the network

c. Authentication

d. Refusal of client connections based on MAC address



a. Encryption

c. Authentication

Wi-Fi Protected Access 2 (WPA2) provides encryption and authentication for wireless networks.

200

Which of the following provides security for wireless networks? 

a.  WAP2

b.  CSMA/CD

a.  WAP2

Wi-Fi Protected Access (WPA and WPA2) provides encryption and user authentication for wireless networks. Wired Equivalent Privacy (WEP) also provides security, but WPA is considered more secure than WEP. A wireless access point (WAP) is a hardware device, like a switch, that provides access to the wireless network. 802.11a is a wireless networking standard that defines the signal characteristics for communicating on the wireless network. CSMA/CD is a media access control method that controls when a device can communicate on the network.

300

Which of the following components is NOT required to create a network? 

a. Network interfaces



b. Wireless adapter 

Networks are made of computer systems, network media, and network interfaces. Wireless adapters may be used in a network but are not necessary.

300

You have recently issued new mobile phones to the sales team in your company. Each phone has the ability to store and transmit encrypted information for such things as making payments at a checkout counter. Which of the following is the technology being used in these phones?

a.  VPN

b.  NFC chips 

b.  NFC chips 

Near field communications (NFC) chips are a wireless mobile technology that can be embedded in credit cards and smartphones for transmitting financial information when making payments. For example, many point of sale devices can read information from NFC chips. NFC chips can also be used in passports to contain identity information.

300

Kris recently subscribed to a cable Internet provider. Which of the following devices is needed to convert the signal received on the coax cable to data that can be understood by a computer? 

a.  Router 

b.  Modem

b.  Modem

Cable internet providers require the client to have a modem to receive the signal from a coax cable and convert the signal for use with a data network, typically over copper Ethernet cables.

300

You need to add security for your wireless network. You would like to use the most secure method. Which method should you implement? 

a. WEP

b. WPA2

b. WPA2

Wi-Fi Protected Access 2 (WPA2) is currently the most secure wireless security specification. WPA2 includes specifications for both encryption and authentication. WPA was an earlier implementation of security specified by the 802.11i committee. WEP was the original security method for wireless networks. WPA is more secure than WEP, but less secure than WPA2. Kerberos is an authentication method, not a wireless security method.

300

A technician is checking a customer's wireless network performance and has determined it was using 802.11g. The technician's recommendation is for the customer to upgrade to 802.11ac. Which of the following is the BEST reason to upgrade? 

a.  More overlapping channels

b. Improved performance 


b. Improved performance 

802.11ac provides substantially improved transfer rates.

400

Which of the following is the best definition for a LAN? 

a.  An extension of a private network over a shared or public network, such as the Internet. 

b.  A network in a small geographic area, like in an office. 

b.  A network in a small geographic area, like in an office. 

A LAN is a network in a small geographic area, like in an office.

400

Which of the following provides services to hosts on its network? 

a.  Server

b.  Client 

a.  Server 

Servers are computers that provide network services to other hosts on a network.

400

Which IEEE wireless standards specify transmission speeds up to 54 Mbps? (Select two.) 

a.  802.11g

b.  802.11b

c.  802.11a


a.  802.11g

c.  802.11a

Both the 802.11a and the 802.11g wireless standards specify maximum transmission speeds up to 54 Mbps. Bluetooth is a wireless standard commonly used to connect peripheral devices and operates at 720 Kbps. The 802.11b wireless standard provides transmission speeds of 11 Mbps. 802.1x is a wireless security standard that provides an authentication framework for 802-based networks.


400

Which of the following is used on a wireless network to identify the network name? 

a.  SSID 

b.  MAC address

a.  SSID

Wireless devices use the SSID (Service Set Identification) to identify the network name. All devices on a wireless network use the same SSID. The MAC address is a unique physical device address. The WPA2 Personal passphrase and the WEP key are both mechanisms used to secure wireless communications.

400

A network administrator wants to change the frequency of their wireless network to allow more channels that do not interfere with each other. Which of the following frequencies or protocols would accomplish this? 

a.  2.4 GHz

b.  5 GHz

b.  5 GHz

The 5 GHz frequency provides the most channels that do not overlap. 2.4 GHz only has 3 channels that do not overlap. The protocols 802.11b and 802.11g operate at the 2.4 GHz frequency.

500

You are an IT technician for your company. Your boss has asked you to set up and configure a wireless network to service all of the conference rooms.  Which of the following features lets you allow or reject client connections based on the hardware address?

a.  SSID

b. MAC address filtering 

b. MAC address filtering 

MAC address filtering allows or rejects client connections based on the hardware address. Wi-Fi Protected Access II (WPA2) provides encryption and user authentication for wireless networks. Wired Equivalent Privacy (WEP) also provides security, but WPA2 is considered more secure than WEP. The SSID is the network name or identifier.

500

A technician is tasked to prepare a conference room so that at least 20 guests will be able to wirelessly connect laptop computers to the company network. Which of the following network devices would be the BEST choice for this connectivity?

A.  Firewall

B.  Access Point

b.  Access point

An access point gives WiFi access to a network.

500

Which of the following are characteristics of Bluetooth? (Select two.) 

a.  5.75 GHz radio wireless 

b.  Ad hoc connections

c.  2.4 GHz radio wireless

b.  Ad hoc connections

c.  2.4 GHz radio wireless

Bluetooth is a wireless networking standard that uses 2.4 GHz radio waves. These are the same type of radio waves used with 802.11 wireless networking, so radio transmission can go through walls (not limited to line-of-sight connections). Bluetooth uses ad hoc connections between devices. Infrared uses red spectrum light waves and is limited to line-of-sight transmissions.

500

A small business named Widgets, Inc. has hired you to evaluate their wireless network security practices. As you analyze their facility, you note the following using a wireless network locator device.

They use an 802.11n wireless network.

The wireless network is broadcasting an SSID of Linksys. 

The wireless network uses WPA2 with AES security.

Directional access points are positioned around the periphery of the building. Which of the following would you MOST likely recommend your client do to increase their wireless network security? (Select two.)

a.  Upgrade to an 802.11g wireless network. 

b.  Change the SSID to something other than the default. 

c.  Disable SSID broadcast. 

b.  Change the SSID to something other than the default. 

c.  Disable SSID broadcast. 

You should recommend the following:

  • Disable SSID broadcast. This makes the network harder (but not impossible) to locate.
  • Change the SSID to something other than the default. This obscures what type of AP is in use.

Using WPA instead of WPA2 would decrease the security of the wireless network as would implementing omnidirectional APs. Switching to an 802.11g network would dramatically reduce the speed of the network without providing any security enhancements.

500

Dayshawn has finished installing a wireless router for his neighbor's small business. Which wireless standard should Gary use to support up to 150 Mbps on the 5 GHz band? 

a. 802.11g 

b. 802.11n


b. 802.11n

The 802.11n wireless standard supports a maximum transfer rate of 150 Mbps on the 5 GHz band.

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