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A+ 220-801, 220-802 Q&A > Networking > Flashcards

Networking Flashcards

1
Q

Which parameter of the ping command will cause the command to continue sending messages until interrupted?

A

-t

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2
Q

Which parameter of the ping command will display the host name of the IP address you are pinging, if successful?

A

-a

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3
Q

What is the bit length of IPv6 addresses?

A

128

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4
Q

What is the maximum transmission distance for Bluetooth 1.0 devices?

A

100 meters or 300 feet

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5
Q

What is the maximum transmission distance for Bluetooth 2.0 devices?

A

10 meters or 33 feet

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6
Q

What is the maximum transmission distance for Bluetooth 3.0 devices?

A

1 meter or 3 feet

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7
Q

What is the maximum indoor and outdoor distance for 802.11a?

A

Indoors, 100 meters or 300 feet;

Outdoors, 350 meters or 1,200 feet

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8
Q

What is the maximum indoor and outdoor distance for 802.11b?

A

Indoors, 150 meters or 492 feet;

Outdoors, 500 meters or 1,640 feet

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9
Q

What is the maximum indoor and outdoor distance for 802.11g?

A

Indoors, 150 meters or 492 feet;

Outdoors, 500 meters or 1,640 feet

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10
Q

What is latency in a network?

A

The amount of delay a network can experience

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11
Q

How can you ensure that your SSID is not seen by computers in other offices?

A

Do not broadcast the SSID

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12
Q

Why would you use biometric security devices with a wireless connection?

A

To ensure that only that user can connect into the network

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13
Q

What is the maximum transmission speed supported by the 802.11b standard?

A

11 Mbps

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14
Q

What is the maximum transmission speed supported by the 802.11g standard?

A

54Mbps

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15
Q

What is the maximum transmission speed promised by the 802.11n standard?

A

540 Mbps

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16
Q

What is the maximum transmission speed supported by the 802.11a standard?

A

54 Mbps

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17
Q

Which network configuration needs to be checked when you are not able to resolve a web site by its URL but you can browse the internet by using IP addresses?

A

Domain Name System (DNS) server configuration

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18
Q

Which service determines the IP addresses associated with the NetBIOS name of the computer?

A

Windows Internet Naming Service (WINS)

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19
Q

If a computer is manually cofigured with its IP address, and the IP address is one that duplicates existing IP addresses on the network, what does the subnet mask appear as?

A

0.0.0.0

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20
Q

Which service translates domain names into numeric IP addresses?

A

DNS

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21
Q

Which common command is used to check the Internet connectivity from the command prompt?

A

ping

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22
Q

What must be different in the network configuration for each client if TCP/IP is used as the standard protocol?

A

The IP addresses

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23
Q

Which authentication is required with WPA?

A

802.1X authentication

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24
Q

Which protocol is used by Wireless FIdelity (Wi-Fi) networks?

A

802.11 wireless protocol

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25
Q

Which radio frequency band is used by microwaves and cordless telephones?

A

2.4 GHz

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26
Q

Which Wi-Fi networking standard operates in the 5 GHz frequency?

A

802.11a

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27
Q

Which three Wi-Fi networking standards operate within the 2.4 GHz radio frequency band?

A

802.11b, 802.11g, and 802.11n

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28
Q

What is the result of executing the IPCONFIG command from the Run dialog box?

A

A black window appears and then disappears automatically

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29
Q

Which TCP/IP command line utility should you use to display the IP address and subnet mask for a Windows computer?

A

ipconfig

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30
Q

Which ipconfig switch displays the current IP configuration on a workstation?

A

/all

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31
Q

Which command releases the tcp/ip configuration information obtained from a dynamic host configuration protocol (DHCP) server?

A

ipconfig /release

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32
Q

Which command switch should you use with ipconfig to display the other available command switches and their description?

A

/?

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33
Q

Which command is used to find the dhcp server that gave your computer an IP address?

A

ipconfig /all

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34
Q

Which operating systems include the ipconfig command line utility?

A

Windows NT, Windows 2000, Windows Server 2003, Windows XP, Windows Server 2008, and Windows Vista

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35
Q

What are the results of running the netstat command?

A

A listing of the open ports

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36
Q

What is the purpose of the Zero configuration service?

A

It automatically connects to a preferred wireless network when the network is in range

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37
Q

How does communication occur in full duplex mode?

A

You can transmit and receive the signal on the same channel at the same time

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38
Q

How does communication occur in half duplex mode?

A

A single communication channel is used for both transmitting and receiving

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39
Q

How does communication work in simplex mode?

A

Two separate channels are used for transmitting and receiving the signal

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40
Q

Which internet connection has a line of sight requirement?

A

Satellite

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41
Q

What dial-up internet connections use a standard RJ-11 telephone jack to establish a connection between the modem and the ISP?

A

Digital subscriber line (DSL) and analog modem connections

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42
Q

What internet connectivity type always uses a coaxial cable to establish a two-way connection to the internet?

A

Cable

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43
Q

What is the maximum transmission speed of Category 6 (Cat6) cable?

A

10 Gbps

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44
Q

What is the maximum length of RG-58 ThinNet coaxial cable?

A

Approx. 185 meters (607 feet)

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45
Q

What is the maximum length of RG-8 ThickNet coaxial cable?

A

Approx. 500 meters (1,640 feet)

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46
Q

What is the maximum transmission speed of Category 5e cable?

A

1000 Mbps or 1 Gbps

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47
Q

What does a cable rated as “plenum” indicate about the cable?

A

It will not produce toxic gas when it burns

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48
Q

What is the main difference in the physical composition of UTP and STP cable?

A

Mesh shielding

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49
Q

Which transmission cable has a transmission range up to 100 meters or 328 feet?

A

Unshielded twisted pair (UTP) or shielded twisted pair (STP) cable

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50
Q

What is the transmission distance supported by multi-mode fiber optic cable?

A

3000 feet

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51
Q

What is the transmission distance supported by single-mode fiber optic cable?

A

Approx. 20 miles

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52
Q

What are the two most popular connectors available for fiber optic cabling?

A

The ST and SC connectors

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53
Q

Which technology allows voice data to be transmitted aver a company’s computer network?

A

VOIP

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54
Q

What type of port is used to connect a computer to a 100BaseT network?

A

RJ-45

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55
Q

What type of port is included on a dial up modem?

A

RJ-11

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56
Q

What should you do to keep to wireless access points that are in close proximity from interfering with each others’ signals?

A

Configure them to use different channels

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57
Q

Which type of wireless network interference is caused by competing wireless signals?

A

Radio Frequency Interference (RFI)

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58
Q

Which type of wireless network interference is caused by electrical devices, such as fluorescent lights?

A

Electromagnetic Interference (EMI)

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59
Q

Which TCP port is used by Hypertext Transfer Protocol (HTTP)?

A

Port 80

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60
Q

Which TCP port is used by Simple Mail Transfer Protocol (SMTP)?

A

Port 25

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61
Q

Which TCP port is used by Internet Message Access Protocol version 4 (IMAP4)?

A

Port 143

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62
Q

Which TCP port is used by Post Office Protocol version 3 (POP3)?

A

Port 110

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63
Q

In which three Open System Interconnection (OSI) layers do the wide area network (WAN) protocols operate?

A

The Physical, Data Link, and Network layers

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64
Q

Which Operating System Interconnection (OSI) layer defines network addresses?

A

The Network layer

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65
Q

Which Operating System Interconnection (OSI) layer defines the electrical, mechanical, procedural, and functional specifications for activating, maintaining, and deactivating the link between communicating network systems?

A

The Physical layer

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66
Q

In which layer of the OSI model would a cable break that resulted in a no link light on the switch occur?

A

The Physical layer

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67
Q

Which OSI layer provides reliable transit of data across a physical network link?

A

The Data Link layer

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68
Q

Which OSI layer transmits segments of data from the session layer across a network?

A

The Transport layer

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69
Q

Which OSI layer establishes, manages, and terminates service requests and responses that occur between applications that are running on different devices on the network?

A

The Session layer

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70
Q

Which OSI layer provides codes and conversion functions that are applied to application layer data?

A

The Presentation layer

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71
Q

Which OSI layer interacts with software that acts as a communication component?

A

The Application layer

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72
Q

How many binary bits does an IPV4 address include?

A

32 binary bits

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73
Q

What is the decimal range of values in each octet of an IPv4 address?

A

0 to 255

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74
Q

What is the default mask for Class A networks?

A

255.0.0.0

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75
Q

What is the default mask for Class B networks?

A

255.255.0.0

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76
Q

What is the default mask for Class C networks?

A

255.255.255.0

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77
Q

What is the default subnet mask of the IP address 192.168.200.1?

A

255.255.255.0

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78
Q

What is the IP address range that can be assigned in Class A networks?

A

1.0.0.0 - 126.255.255.255

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79
Q

What is the IP address range that can be assigned in Class B networks?

A

128.0.0.0 - 191.255.255.255

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80
Q

What is the IP address range that can be assigned in Class C networks?

A

192.0.0.0 - 223.255.255.255

81
Q

Which type of radio network is made up of radio cells served by a fixed transmitter known as a base station?

A

A cellular network

82
Q

Which optical source emits photons in a coherent beam?

A

Light Amplification by Stimulated Emission of Radiation (laser)

83
Q

What three data rates are defined for operation over twisted-pair and optical fiber cables for Ethernet networks?

A

10 Mbps for 10BaseT
100 Mbps for Fast Ethernet
1000 Mbps for Gigabit Ethernet

84
Q

Which serial bus interface standard offers high-speed communications and isochronous real-time data services for digital audio and video?

A

FireWire, also referred to as i.Link or IEEE 1394

85
Q

Which IEEE standard defines the Physical layer and the media access control (MAC) sublayer of the Data Link layer for a wired Ethernet?

A

IEEE 802.3

86
Q

Which IEEE standard provides an over-the-air interface between wireless devices such as client computers, printers, or wireless routers?

A

IEEE 802.11

87
Q

Which protocol uses a cryptographic system that involves two keys, private and public, to encrypt data across the internet?

A

Secure Socket Layer (SSL)

88
Q

What is the address convention for URLs that require an SSL connection?

A

https://

89
Q

Which Transport layer protocol provides an interface between IP and upper layer processes?

A

User Datagram Protocol (UDP)

90
Q

What are the four fields of a User Datagram Protocol (UDP) header?

A

Source port, destination port, length, and checksum

91
Q

Which lower-layer protocol provides communication between computers and other network devices by using unique global addressing?

A

IP

92
Q

What could be the reason you cannot ping 127.0.0.1 or ping localhost?

A

TCP/IP is not loaded properly on your computer

93
Q

What is the standard IP address used for a loopback network connection?

A

127.0.0.1

94
Q

Which node on a network serves as an access point to another network?

A

A default gateway

95
Q

Which network mask is used to determine the number of bits in an octet that identifies the subnetwork and the number of bits to provide room for host addresses?

A

A subnet mask

96
Q

Why should you configure your Windows XP computer with an IP address in the alternate configuration of TCP/IP properties?

A

The alternate configuration ensures that you will have an IP address if your computer does not receive an IP address from a DHCP server

97
Q

Which parameter of the ipconfig command restores the DHCP configuration for adapters?

A

/renew

98
Q

Which parameter of the ipconfig command reorganizes contents of the DNS client resolver cache?

A

/flushdns

99
Q

Which parameter of the ipconfig command exhibits contents of the DNS client resolver cache?

A

/displaydns

100
Q

Which parameter of the ipconfig command starts manual dynamic registration for DNS names and IP addresses?

A

/registerdns

101
Q

What is the maximum speed limit supported by a T1 line?

A

1.544 Megabits per second (Mbps)

102
Q

The IP address 192.168.0.1 is reserved for which type of network?

A

Private network

103
Q

Which types of unshielded twisted pair (UTP) cables support data transfer up to 1000 Megabits per second (Mbps)?

A

CAT5e and CAT6 UTP cables

104
Q

Which unshielded twisted pair (UTP) cab;es can support Gigabit Ethernet cards?

A

CAT5e and CAT6

105
Q

What hardware device can connect dissimilar networks and can operate at different layers of the Open Systems Interconnection (OSI) model?

A

Gateway

106
Q

Which hardware device can connect similar networks and can separate the network traffic on each segment?

A

Bridge

107
Q

The IP address 172.16.0.0 is reserved for which type of network?

A

Private network

108
Q

Which two details can you use to access a router’s configuration page through a web browser?

A

The router’s IP address and the router name

109
Q

Which command should you use to access the router configuration from the command prompt?

A

Telnet

110
Q

Which hardware device operates at the Physical layer (Layer 1) of the OPen Systems Interconnection (OSI) model to provide connectivity to network computers?

A

A hub

111
Q

Which color of the Light-emitting diode (LED) light on a network interface card (NIC) usually indicates a collision on the network?

A

Amber

112
Q

Which hardware device operates at the Data Link layer of the OSI model to provide connectivity to network computers?

A

A switch

113
Q

Where can you set a static address on a Windows XP computer?

A

In the Internet Protocol (TCP/IP) Properties dialog box

114
Q

Which tool is used to enable file and print sharing on a Windows XP computer?

A

Right-click My Network Places, and choose Properties

115
Q

Which protocol is used to transmit data securely between a File Transfer Protocol (FTP) client and an FTP server?

A

Secure File Transfer Protocol (SFTP)

116
Q

Which ports are used by FTP?

A

Ports 20 and 21

117
Q

Which protocol is used for transferring files from one computer to another?

A

FTP

118
Q

Which tool enables you to connect to your Windows XP computer across the Internet from virtually any computer?

A

Remote Desktop Connection

119
Q

Which Windows program is used to set up internet connections?

A

Internet connection wizard

120
Q

Which program is used on a Windows computer that allows multiple users to access applications or data stored on a remote computer over a network connection?

A

Terminal Services

121
Q

Which authentication protocol is used on a Windows XP computer that is logging into an Active Directory domain?

A

Kerberos

122
Q

Which command is used to trace the IP traffic route through intermediate routers and system network interfaces, identifying the full path traveled from source to destination?

A

tracert

123
Q

How do you configure the new wireless router that you bought for your home business?

A

Configure the router with your browser from a connected computer

124
Q

How do you update the firmware on your new wireless router that you bought for your home or business?

A

Connect to the router with your browser from a connected computer and download the update to the firmware

125
Q

Which command is used to display the routes in the routing table on a router?

A

route

126
Q

How do you change the IP address on your new wireless router that you bought for your home business?

A

Connect to the router with your browser from a connected computer and change the configuration

127
Q

Which device enables you to connect a wired Ethernet device to a wireless network?

A

Wireless bridge

128
Q

Which device is used to extend the range of an existing wireless network?

A

Wireless repeaters

129
Q

Where do you go to check the signal strength of your wireless connection?

A

Right-click the wireless connection icon and choose Status

130
Q

At which band does Bluetooth technology operate?

A

2.45 GHz

131
Q

What is the radio frequency at which IEEE 802.11g operates?

A

2.4 GHz

132
Q

What is the radio frequency at which IEEE 802.11a operates?

A

5.0 GHz

133
Q

What is the maximum transmission speed supported by CAT5 cables?

A

100 Mbps

134
Q

After plugging a cable into your NIC card, why do you not get a link light on the NIC card?

A

Your cable is not plugged into a hub or switch

135
Q

How can you test whether TCP/IP is properly loaded on your NIC card?

A

Issue the command ping 127.0.0.1 or ping localhost

136
Q

Which type of cable is used in a 10BASE-T ethernet standard?

A

CAT3 or CAT5 unshielded twisted pair (UTP) cable

137
Q

How do you test the physical connection between the computer and a switch?

A

Check the link lights on the NIC and switch

138
Q

Which tool is used to disable a NIC card on a computer running Windows XP?

A

Device Manager

139
Q

Which file on Windows XP contains static DNS mappings?

A

HOSTS file

140
Q

Which service is used to resolve an IP address to its Fully Qualified Domain Name (FQDN)?

A

DNS

141
Q

Which protocol resolves an IP address to a Media Access Control (MAC) address?

A

Address Resolution Protocol (ARP)

142
Q

Which service allows Windows workstations to access UNIX servers by name?

A

DNS

143
Q

Which command is used on a computer running Windows XP to display the DNS server that the computer is using?

A

ipconfig /all

144
Q

Which connector is used for 10base-t network cables?

A

rj-45

145
Q

Which cable is used to connect two workstations directly without using a hub or a switch?

A

A crossover cable

146
Q

Which tool is used to measure the components current in amperes and volts?

A

Multimeter

147
Q

Which tool is used to measure the output of a computer’s power supply?

A

Multimeter

148
Q

Which device is used for locating faults in unshielded twisted pair (UTP) and coaxial cables?

A

Time-domain reflectometer (TDR)

149
Q

Which component do you install in a computer to establish a physical connection to the network media?

A

Network Interface Card (NIC)

150
Q

Which devices are used to connect workstations in a 100-baseT network?

A

Switches and hubs

151
Q

On which layer of the OSI reference model does a switch operate?

A

The Data Link layer or Layer 2

152
Q

On which layer of the OSI reference model does a router work?

A

The Network layer or Layer 3

153
Q

Which device is the combination of a bridge and a router?

A

Brouter (Bridge Router)

154
Q

Which devices are used to forward packets between multiple networks?

A

Routers or switches

155
Q

What device(s) should you use to isolate broadcast traffic on your LAN to certain segments?

A

A router or switch

156
Q

What are the two types of satellite connections?

A

Unidirectional and bidirectional

157
Q

Which type of light is used for line-of-sight wireless communications for local area networks?

A

Infrared

158
Q

Which unit is used to measure attenuation?

A

Decibels

159
Q

Which term, apart from latency, is used for a delay that occurs in satellite connections?

A

Propagation delay

160
Q

Which two wireless networks provide data throughput of 54 megabits per second (Mbps) and uses orthogonal frequency-division multiplexing (OFDM) encoding?

A

The 802.11a and 802.11g wireless networks

161
Q

Which radio frequency is used to operate 802.11b and 802.11g wireless networks?

A

2.4 GHz

162
Q

Which cable is used with rj-45 connectors?

A

Unshielded twisted pair (UTP) or shielded twisted pair (STP)

163
Q

Which two default elements should you change to secure a newly configured wireless network from unauthorized access?

A

SSID and password

164
Q

Which type of address should you specify in wireless clients when you configure a wireless access point as a router?

A

Gateway address

165
Q

Which command is used to determine the MAC address of the computer’s network interface card (NIC)?

A

ipconfig /all

166
Q

What is the data rate speed for the 802.11g wireless standard?

A

54 Mbps

167
Q

What is the data rate speed for the 802.11b wireless standard?

A

11 Mbps

168
Q

What is the data rate speed for the 802.11b+ wireless standard?

A

22 Mbps

169
Q

In which two layers of the OSI model is the Wired Equivalent Privacy (WEP) used?

A

The Data Link layer and the Physical layer

170
Q

Which standard allows devices , such as keyboards, printers, modems, or a mouse, to communicate wirelessly with other devices in proximity?

A

Bluetooth

171
Q

Which subnet mask is used by Windows while using Automatic Private Internet Protocol Addressing (APIPA)?

A

255.255.0.0

172
Q

What is the maximum distance to which the Bluetooth technology can transmit data?

A

Class 1: 100 meters
Class 2: 10 meters
Class 3: 1 meter

173
Q

In how many channels does the Bluetooth protocol divide its operating band?

A

79 channels

174
Q

Which type of topology is used to connect devices with each other by using Bluetooth?

A

Point-to-Point

175
Q

Which hardware device routes data from a local area network (LAN) to a phone line or other network connection?

A

Router

176
Q

What is the best method to provide shared internet access without leaving a computer on at all times?

A

Router-based internet sharing

177
Q

How many network cards are required in each computer when internet access is shared via a router?

A

One in each computer

178
Q

To which port on the router or switch should you connect a computer to to access the internet?

A

To the LAN port

179
Q

Which two types of network cables are used in wired networking?

A

Coaxial cable and twisted-pair cable

180
Q

Which connector is used for high speed CAT7 LAN cabling?

A

GG45

181
Q

What IP address range does Automatic Private IP Addressing (APIPA) use?

A

169.254.0.1 to 169.254.255.255

182
Q

How do you avoid getting an APIPA address if the DHCP server is down?

A

Configure an alternate address

183
Q

How many IP addresses does a router have?

A

Two: one for each network that it is connecting; External and internal

184
Q

When accessing the internet by using a cable modem, who decides on whether to use a static or a dynamic IP address on the computer?

A

The ISP

185
Q

Which service allows DHCP clients to obtain IP addresses even in cases when the DHCP server cannot provide one?

A

Automatic Private IP Addressing (APIPA)

186
Q

Which new version of the IP protocol has expanded the range of IP addresses from 32 bits to 128 bits?

A

IPv6

187
Q

Why would you Windows XP computer get an IP address of 169.254.0.8?

A

Your computer did not receive an IP lease from a DHCP server

188
Q

What device must be installed in a computer to connect the computer to other computers or a network?

A

A network adapter

189
Q

What are the two main types of network cables?

A

A straight through cable and a crossover cable

190
Q

Which type of network cable is required to directly connect one computer to another computer?

A

A crossover cable

191
Q

How many connection devices are needed to enable the internet connection sharing (ICS) on a Windows XP based computer?

A

Two

192
Q

Which type of IP address is obtained by the network adapter when the internet connection sharing (ICS) is enabled on a computer?

A

Static

193
Q

Which IP address and subnet mask are obtained by the network adapter that is connected to a home network or to a small office network when you enable internet connection sharing?

A

A new static IP address of 192.168.0.1 with a subnet mask of 255.255.255.0

194
Q

Which feature optimizes network traffic on the network connection page?

A

Quaity of Service (QoS) Packet Scheduler

195
Q

If the Internet Connection Firewall feature is on, which proxy will you be connected to while performing a telnet to port 389?

A

The local Lightweight Directory Access Protocol (LDAP) proxy

196
Q

Which service allows connections to Windows-based computers?

A

Client for Microsoft Networks

197
Q

What reduces the broadcast distance of a wireless device without reducing signal speed?

A

A reduction in signal strength

198
Q

What should a technician do to install TCP/IP protocol on a Windows XP computer?

A

Install TCP/IP using Add/Remove Windows Components

199
Q

What is the commonly used protocol for exchanging files over the internet or an intranet network that supports the TCP/IP protocol?

A

FTP

A+ 220-801, 220-802 Q&A (22 decks)

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