question

In the early years of personal computers, networks were plentiful.

answer

false

question

A WAN provides connectivity within a limited geographical area, often within a single building.

answer

false

question

A process called handshaking allows two communications devices on a network to negotiate their communications protocols.

answer

true

question

MAC addresses are used for some low-level network functions and can also e employed to establish network security.

answer

true

question

A packer always travels from the source directly to the destination, never traveling through intermediate routing devices.

answer

false

question

IP addresses can be assigned by ISPs or system managers.

answer

true

question

Microwaves cannot be aimed in a single direction and they have less carrying capacity than radio waves

answer

false

question

A transceiver is a combination of a transmitter and a receiver.

answer

true

question

Bluetooth is often used to connect workstations to a LAN.

answer

false

question

A gateway joins two different types of networks.

answer

true

question

WPA2 makes sure that packets have not been intercepted or tampered with in any way.

answer

true

question

Most routers supply a WAN port designed for an internet connection.

answer

true

question

Windows automatically senses nearby networks and displays their SSIDs.

answer

true

question

A cryptographic algorithm is a word, number, or phrase that must be known to encrypt or decrypt a message.

answer

false

question

The internet is the world's largest example of a(n) LAN.

answer

false

question

A storage device that directly connects to a network is called network peripheral storage.

answer

false

question

High-bandwidth communications systems, such as cable TV and DSL, are sometimes referred to as peakband.

answer

false

question

The best-known communications protocol is probably SMTP, which regulates Internet data transport.

answer

false

question

Data in a(n) wired network travels without the use of network cables.

answer

false

question

Microwaves are electromagnetic signals that can be aimed in a single direction and have more carrying capacity than radio waves.

answer

true

question

Wi-Fi signals cannot be disrupted by interference from devices such as microwave ovens, cordless telephones, and baby monitors.

answer

false

question

A wireless ad hoc network uses a centralized broadcasting device, such as a wireless access point or router.

answer

false

question

The process of converting ciphertext into plaintext is called encryption.

answer

false

question

Public key encryption uses one key to encrypt a message and another key to decrypt it.

answer

true

question

A ____ is a public high-speed network capable of voice and data transmission within a range of about 50 miles.

answer

MAN

question

To connect to a LAN, a computer requires ____.

answer

a network interface card

question

The most important network device is a ____.

answer

router

question

A ____ is a physical path or a frequency used for signal transmissions.

answer

communications channel

question

High-bandwidth communications systems are sometimes referred to as ____.

answer

broadband

question

Dial-up Internet access is an example of a(n) ____ communications system.

answer

narrowband

question

In the technology referred to as ____, a message is divided into several parcels that can be routed independently to their destination.

answer

packet switching

question

A protocol known as ____ is designed to automatically distribute IP addresses.

answer

DHCP

question

Which of the following is NOT an advantage of using a wired network?

answer

unlimited mobility

question

Ethernet is a wired technology that is defined by ____ standards.

answer

IEEE 802.3

question

Ethernet is easy to ____.

answer

all of the above

question

On an Ethernet, a ____ is broadcast to every device but is accepted only by the device to which it is addressed.

answer

packet

question

Most wireless networks transport data as ____ signals.

answer

RF (radio frequency)

question

____ is a disadvantage of using a wireless network when compared to a wired network.

answer

all of the above

question

Wireless signal range can be limited by ____.

answer

all of the above

question

The most popular wireless LAN technology is ____.

answer

Wi-Fi

question

____ is a wireless MAN or WAN technology commonly used for fixed Internet access.

answer

WiMAX

question

In ____ mode two Bluetooth devices can find each other and exchange passkeys.

answer

discovery

question

A Wi-Fi device ____.

answer

both a. and b.

question

To stay with the current Wi-Fi standard, make sure your device is compatible with ____.

answer

802.11n

question

Legacy equipment without Wi-Fi can be outfitted with a Wi-Fi adapter that plugs into a(n) ____.

answer

either a. or b.

question

Devices with one or more antennas use ____ technology to boost signals and spread them more evenly over the signal range.

answer

MIMO

question

Before using your network, you should adjust the configuration settings of the ____ to make sure your network is secure.

answer

router

question

The configuration settings are stored in the router's ____ memory.

answer

EEPROM

question

To access your router's configuration utility, open a browser and enter the router ____.

answer

address

question

In areas where there are overlapping wireless networks, such as in a city or on a college campus, ____ help you log in to the right network, rather than a network run by a hacker who will try to suck important information off your computer as soon as you connect.

answer

SSIDs

question

Most routers ship with a(n) ____ predefined by the manufacturer.

answer

SSID

question

A ____ is a network device that extends a wired network by adding additional ports.

answer

hub

question

A ____ is a network device that connects two similar networks.

answer

bridge

question

Wireless ____ scrambles the data transmitted between wireless devices and then unscrambles the data only on devices that have a valid key.

answer

encryption

question

The original wireless encryption was called ____.

answer

WEP

question

A(n) ____ is the basis for scrambling and unscrambling the data transmitted between wireless devices.

answer

wireless encryption key

question

To connect a phone or other device to a network, make sure that ____ is enabled, then wait for the device to sense the network, and when asked, enter the encryption key.

answer

Wi-Fi

question

On a home network, file ____ allows you to view and copy photos, for example, from your desktop computer to a tablet computer.

answer

sharing

question

To see a list of devices on your network, you can use your operating system's ____ utility.

answer

file management

question

A ____ server is a computer whose primary purpose is to be a repository for files that can be accessed by network workstations.

answer

file

question

To configure a file server, open a browser from any workstation, enter the file server's ____ address, and provide the administrator ID and password.

answer

IP

question

Symptoms of network problems include ____.

answer

all of the above

question

A message that has not been encrypted is referred to as ____.

answer

plaintext

question

An encrypted message is referred to as ____.

answer

ciphertext

question

The process of converting ciphertext into plaintext is called ____.

answer

decryption

question

A ____ is a procedure for encrypting or decrypting a message.

answer

cryptographic algorithm

question

A ____ is a word, number, or phrase that must be known to encrypt or decrypt a message.

answer

cryptographic key

question

In ____ key encryption, the key used to encrypt a message is also used to decrypt the message.

answer

symmetric

question

____ encryption uses one key to encrypt a message but another key to decrypt the message.

answer

public key

question

____ is a crucial technology for e-commerce and e-mail.

answer

public key encryption

question

With PGP, you send the private key to ____.

answer

no one

question

Thomas's friend has asked that the network be configured such that, if he has photos on his tablet computer and wants to transfer them to his desktop computer, he can do so easily. What capability is Thomas's friend looking for?

answer

file sharing

question

Thomas's friend has a particular folder into which he wants to allow people to put files without allowing them to open, copy, or change any files in that folder. What kind of permission should Thomas assign to this folder?

answer

write only

question

Thomas's friend has a particular file that he wants to allow authorized people to open and view without being able to modify or delete it. What kind of permission should Thomas assign to this file?

answer

read

question

Esteban's router has no screen or keyboard of its own so the easiest way for him to access the router's configuration software is for him to make this connection with a(n) ____.

answer

Ethernet cable

question

As part of your research, you find that the longer the key, the longer it will take a devious competitor to crack the code. You also find that most encryption today uses a ____ key, and so you decide to use an encryption key of that size.

answer

128-bit

question

A(n) ____________________ is any device that contains network circuitry to directly connect to a network.

answer

NETWORKED PERIPHERAL

question

A(n) ____________________ is a connection point on a network.

answer

NODE

question

If a network interface card is not built into the main system board of a computer, it can be added to a slot in the system board or to a(n) ____________________ port.

answer

USB

question

A communications ____________________, or link, is a physical path or a frequency used for signal transmission.

answer

CHANNEL

question

High-bandwidth communications systems are sometimes referred to as ____________________.

answer

BROADBAND

question

Transmission signals can be disrupted by interference called ____________________, which has the potential to corrupt data.

answer

NOISE

question

A(n) ____________________ is a parcel of data that is sent across a computer network.

answer

PACKET

question

____________________ switching essentially establishes a private link between one telephone and another for the duration of a call.

answer

CIRCUIT

question

A(n) ____________________ address is a series of numbers, such as 204.127.55.1, used to identify a network device.

answer

IP

question

Most wireless networks transport data using ____________________ signals.

answer

RF

question

For a typical home network, all that's needed in terms of network equipment is a wireless ____________________ that includes an Ethernet switch and Internet gateway.

answer

ROUTER

question

A(n) ____________________ is the name of a wireless network.

answer

SSID

question

File ____________________ allows files containing documents, photos, music, and other data to be accessed from computers other than the one on which they are stored.

answer

SHARING

question

The wave on the bottom in the accompanying figure depicts a digital signal.

answer

false

question

The wave on the top in the accompanying figure depicts an analog signal.

answer

false

question

In the accompanying figure, the item on the left simply plugs into a serial port on the outside of the system unit.

answer

false

question

In the accompanying figure, the item on the right can be installed in an expansion slot inside the system unit of a desktop computer.

answer

true

question

In the accompanying figure, the item on the left can be used with a laptop or desktop computer.

answer

true

question

In the accompanying figure, the networks that don't have an icon of a lock next to them aren't secured, and are open targets for hackers to steal data, spread viruses, and create a launching pad for spam.

answer

true

question

When network discovery is turned on in a wireless network, any Wi-Fi enabled device within range of your network, such as the one shown in the accompanying figure, can see its URL.

answer

false

question

In the accompanying figure, the lock icon indicates a network secured with wired encryption.

answer

false

question

In the accompanying figure, IWC-guest is a(n) secure network.

answer

false

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