True/False
Indicate whether the
statement is true or false.
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1.
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The number of computers in a LAN can range from two to several hundred.
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2.
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Software firewalls are usually located outside the network security perimeter as
the first line of defense.
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3.
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Port address translation is typically used on home networks that allow multiple
users to share the same IP address.
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4.
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A home WLAN cannot connect a laptop computer, desktop computer, and laser
printer into a computer network without running cables between the devices.
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5.
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Firewalls cannot filter outgoing traffic.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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6.
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The purpose of a(n) ____ is to allow sharing.
a. | packet | c. | IP address | b. | computer network | d. | packet filter |
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7.
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A computer network that has computers located relatively close to each other is
called a ____.
a. | local area network | c. | wireless network | b. | protocol | d. | wide area
network |
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8.
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A ____ connects computers over a larger geographical area than a LAN.
a. | local area network | c. | wireless network | b. | protocol | d. | wide area
network |
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9.
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The most common set of protocols used on networks is called the ____.
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10.
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A(n) ____ uniquely identifies a computer from all other computers on the
network.
a. | IP address | c. | virtual private network | b. | access
point | d. | server |
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11.
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The transmission of data through a computer network is accomplished by dividing
the data to be sent into smaller units called ____.
a. | botnets | c. | tunnels | b. | hotspots | d. | packets |
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12.
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The hardware that connects a computer to a wired network is called a(n)
____.
a. | packet filter | c. | NIC | b. | intrusion detection system | d. | DMZ |
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13.
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A(n) ____ acts as the base station for a wireless network.
a. | IP address | c. | rule base | b. | access point | d. | router |
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14.
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A(n) ____ directs packets towards their destination.
a. | protocol | c. | botnet | b. | intrusion detection system | d. | router |
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15.
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A(n) ____ attack attempts to make a server or other network device unavailable
by flooding it with requests.
a. | ping | c. | denial of service | b. | botnet | d. | access point |
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16.
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Instead of using one computer, a(n) ____ may use hundreds or thousands of
computers to flood a server with requests.
a. | SSID | c. | Wi-Fi | b. | DDoS | d. | botnet |
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17.
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An attack that intercepts communication and then forges a response to the sender
is known as a ____ attack.
a. | man in the middle | c. | tunnel | b. | DoS | d. | port |
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18.
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____ is the act of pretending to be the legitimate recipient of a computer
message.
a. | Routing | c. | Smurfing | b. | Sniffing | d. | Spoofing |
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19.
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The ____ address is permanently recorded on the network interface card when it
is manufactured.
a. | access point | c. | NIC | b. | MAC | d. | port |
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20.
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Because network traffic is divided into smaller segments called packets, an
attacker can capture packets as they travel through the network using a technique called ____.
a. | spoofing | c. | routing | b. | smurfing | d. | sniffing |
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21.
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A(n) ____ is designed to prevent malicious packets from entering a computer
network.
a. | IP address | c. | sniffer | b. | firewall | d. | botnet |
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22.
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____ looks at each incoming packet and permits or denies it based strictly on
the rule base.
a. | Stateless packet filtering | c. | Spoofing | b. | Hijacking | d. | Stateful packet filtering |
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23.
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____ keeps a record of the state of a connection between an internal computer
and an external server and then makes decisions based on the connection as well as the rule
base.
a. | Stateless packet filtering | c. | Spoofing | b. | Hijacking | d. | Stateful packet filtering |
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24.
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According to Microsoft, ____ percent of home computers in the U.S. do not use a
firewall.
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25.
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A ____ device hides the IP addresses of network devices from attackers.
a. | botnet | c. | NAT | b. | DoS | d. | Wi-Fi |
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26.
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Although not found on home or small business computer networks, a device that
establishes and maintains network security for large organizations is a(n) ____.
a. | demilitarized zone | c. | VPN | b. | intrusion detection system | d. | hotspot |
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Completion
Complete each
statement.
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27.
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The primary goal of a(n) ____________________ is to conceal the identity of the
computers within a protected network.
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28.
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One way to securely transmit data through a public network is to use a(n)
____________________.
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29.
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The number of public ____________________, or locations where wireless data
services are available, increases at a rate worldwide of almost 350 percent per year.
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30.
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Every wireless network has a unique network name known as the
____________________, which is broadcast from the access point to everyone by default.
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31.
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A firewall is sometimes called a(n) ____________________.
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Matching
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Match each item with a statement below. a. | Server | f. | Rule
base | b. | Wi-Fi | g. | Port
address translation | c. | Protocols | h. | Intrusion detection system | d. | Client network
adapter | i. | DMZ | e. | Proxy server |
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32.
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Also known as a wireless local area network.
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33.
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Also known as a network interface card.
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34.
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The foundation of a firewall.
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35.
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A variation of NAT.
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36.
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Device that establishes and maintains network security for large
organizations.
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37.
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Can inspect packets of data for viruses and other malicious content.
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38.
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Network that sits outside the secure network perimeter.
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39.
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Central computer.
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40.
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A set of rules for data transmission through a network.
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Short Answer
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41.
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What is the difference between a local area network and a wide area
network?
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42.
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Briefly describe a denial of service attack.
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43.
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What are the typical stages of a DDoS attack?
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44.
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What is the difference between a demilitarized zone and a virtual private
network?
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45.
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What are the advantages of implementing a wireless LAN?
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46.
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What are some of features that make wireless LANs more vulnerable to
attacks?
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47.
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Discuss the procedures that should be implemented in order to make WLANs more
secure.
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48.
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What is the purpose of a proxy server?
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49.
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What is the difference between stateful packet filtering and stateless packet
filtering?
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50.
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How often, and under what circumstances, should you test your network
security?
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