Exam 14: Network Basics

A firewall consists of both software and/or hardware and protects a computer or network from intruders.

An Ethernet card uses a standard telephone jack to connect the computer to a network.

Which of the following communications media is a type of radio transmission?

A WAN covers a large geographic distance,such as a state,a country,or even the entire world.

Which of the following types of cabling has one central wire surrounded by insulation,a metallic shield,and a final case of insulating material?

_____ uses a very thin glass or plastic fiber through which pulses of light travel.

A telephone modem is a device that connects your computer to your phone line so that you can access another computer or network.

Restricting payroll information to only authorized payroll employees is ensuring _____ of the information.

What are repeaters that are located in space called?

Which type of network covers a large geographic distance,such as a state,a country,or even the entire world?

Which of the following allows you to plug your computer straight into another computer or printer?

What does a modem do?

Fraudulent e-mail messages claiming to be from your bank is an example of a threat to ____.

A _____ cable is a better-constructed version of the phone twisted-pair cable.

A virtual private network uses _____ to establish a secure channel for transmitting data.

Which of the following is the most widely used category of twisted-pair cabling systems for data transfer in today's LANs?

When a local router on the Internet does not recognize a sender of a message as being attached to one of its LAN,MAN,or WAN connections,it sends the message over the connection to its ____.

Which network device passes network traffic between smaller subnets of a larger network?

Before you can connect a computer with a router to a network,what must you do?

Infrared communications can penetrate walls,buildings,and other structures.