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115 Terms
TCP/IP introduced which of the following communication ideas?
All of the above
three-way network handshake
checksum for error detection
packet switching
collision detection
three-way network handshake
Morris’ Internet worm was an attempt to ...
... damage the Internet so that he could avoid an assignment.
... demonstrate his knowledge in an attempt to get hired by a security company.
... demonstrate weaknesses in Unix security.
... join the group Anonymous.
... weaken US defense by attacking the Internet.
... demonstrate weaknesses in Unix security.
A checksum is used in network communication for which purpose?
Collision detection
Network handshake
Addressing
Encryption
Error checking
Error checking
Which level of the OSI model takes care of reliability?
Data link
Transport
Session
Application
Presentation
Transport
Each layer of the OSI model adds header information onto the message except for the ...
... Physical layer.
... Network layer.
... Application layer.
... Transport layer.
... Session layer.
... Physical layer.
In a 3-D nearest neighbor network, a computer would directly connect to how many neighbors?
2
all computers in the network
3
4
1
3
Which of the following technologies differentiates a normal extranet from a virtual private network?
multiplexing
use of routers instead of switches
use of TCP/IP
use of fiber optic cable
encryption
encryption
In a Linux system, the address(es) of your DNS servers will be stored in which file?
/etc/hosts.allow
/etc/dns
/etc/hosts
/etc/hosts.conf
/etc/hosts.equiv
/etc/hosts.conf
Twisted wire pair is most commonly used in which of the following?
For cable tv
For wired home networks
For cell phone networks
In the public telephone network in the US
For wireless home networks
In the public telephone network in the US
A network port ...
... is the address of the connection (in the back of the computer) between the network card and the computer network.
... indicates the message’s intended application software.
... is a number used to determine if a message should make it through a firewall.
... is the address of a network broadcast device.
... is part of the IP address.
... indicates the message’s intended application software.
True or false. The Internet uses packet switching while local area networks use circuit switching.
False
As a network gets larger (has more computers connected to it), which of the following network topologies performance is most affected?
All are equally affected.
ring
full mesh
tree
star
ring
In which protocol can you use UDP type packets? IP, TCP, neither
TCP
The number of computers on the original ARPAnet was ...
4
Of the following network types (sizes or classifications), which is generally considered the smallest?
CAN
MAN
WAN
LAN
PAN
PAN (personal)
A network with a file server which services the local computers would be considered a(n) ...
... intranet.
... personal area network.
... client-server network.
... peer-to-peer network.
... extranet.
... client-server network.
True or false. We view computer networks at a logical level while the operating system views the network at a physical level.
False.
True or false. In a circuit switched network, the pathway between devices is established before communication commences and is retained for the duration of the communication.
True
The ability of a network to carry multiple messages at the same time is known as ...
... none of the above: this is not possible.
... multiprocessing.
... modulating.
... multitasking.
... multiplexing.
... multiplexing.
Which level of the OSI model performs routing?
Transport
Session
Network
Data link
Physical
Network
Mapping an external IP address into an internal IP address is known as ...
... network address translation.
... IP spoofing.
... modulation.
... demodulation.
... multiplexing.
... network address translation.
TCP/IP’s link layer is roughly equivalent to the OSI model’s ...
... physical and data link layers.
If a computer were to go off line in a network, which of the following topologies would most likely be impacted by this?
ring
Which of the following network topologies is generally considered the cheapest?
bus
Long distance communication (dozens, hundreds or thousands of miles) generally does not use which of the following?
fiber optic cable
IPv4 offers approximately how many unique IP addresses?
4 billion
Which of the following network programs sends information in clear text and so is not secure?
rlogin
ftp
ssh
All of the above except ssh
telnet
All of the above except ssh
Which of the following terms is used to denote a computer you wish to access over a network?
Remote computer
At which level of the OSI model are data units decomposed into packets? (Network, data link, application, physical, transport)
Data link
“T” connectors are used to join computers together in which type of network topology?
bus
A jam signal is used in an Ethernet network to ...
... alert computers of an incoming message to be sent to all computers.
... prevent intrusions by ignoring all incoming messages.
... inform all computers on the network of a collision.
... cause the network to reboot.
... determine if a message is colliding with another.
... inform all computers on the network of a collision.
Which of the following services is used to map IP aliases to IP addresses? firewall, ftp, dns, ssh, http
dns
Switches use which of the following addresses to send a message to the proper device?
None of the above: a switch sends a copy of the message to every device connected to it.
IPv6 addresses
MAC addresses
telephone numbers
IP addresses
MAC addresses
An intranet LAN has which of the following properties?
The LAN uses IP to easily extend the network to the Internet.
All communication is encrypted.
All resources use wireless communication.
The network uses no routers.
The network uses one-to-many network address translation.
The LAN uses IP to easily extend the network to the Internet.
The first message broadcast on the Internet, in its earliest incarnation, was in which year?
1983
1969
1996
1946
1973
1969
A Class C network has how many IP addresses available for the network?
256
True or false. We can think of the Internet and the World Wide Web interchangeably.
False
Which of the following devices deals with IP addresses? hub, switch, router, MODEM, fiber optic cable
router
In order to determine if another computer is available and accessible over your network, you might use which program to test it? ping, sendmail, https, ftp, http
ping
The full mesh network is seldom used because ...
… it costs the most.
True or false. In OSI, only header information is affixed at each layer but in TCP/IP, both header and footer information can be affixed.
True
Last mile technology is used to express the idea that ...
… some households still use low bandwidth telephone lines to access the Internet.
In streaming audio and video, which of TCP and UDP would be preferred as it would trade off speed for assurance of arrival?
TCP
The term used to describe the amount of data that can be transferred over a network over a unit of time, such as bits per second, is known as ...
… bandwidth.
SSL, the secure sockets layer, is an implementation of which level of the OSI model? Session, Transport, Presentation, Application, Network
Presentation
What noteworthy event happened to the APRANet in 1973?
The first international computer was added to the network.
To use the telephone network for computer communication, one must ...
… convert the analog information stored in the computer into a digital form.
Which of the following devices would transmit any message received on to all computers in its local area network?
hub
gateway
repeater
switch
router
repeater
Which mathematical operation is used to obtain the checksum once the sum of the bits is computed?
modulo
IPv4 addresses are _____ bits long.
32
True or false. Data mining, as a process, is not very computationally intensive and so it is highly attractive even if it cannot guarantee finding any information that is useful.
False
A company may draw upon multiple sources to build their data warehouse. Which of the following would not be one of those sources?
Marketing reports
Sales records
All of the above are possible sources.
Project reports
Enterprise resource planning systems
All of the above are possible sources.
True or false. The goal of availability often can conflict with the goals of confidentiality and integrity.
True
True or false. All information systems are stored on computer.
False
Symmetric key encryption is also known as ...
… private key encryption.
True or false. Data should not only be checked for accuracy as it is gathered but it should be checked for accuracy as it is entered (or after it has been entered) into an information system.
True
Some will refer to wisdom as an understanding of ...
… why.
In order to demonstrate that you are an authentic operator, your web site should use ...
... non-repudiation.
... RAID technology.
... public key encryption.
... self-signed digital certificates.
... digital certificates signed by a certificate authority.
... digital certificates signed by a certificate authority.
True or false. To generate a decision tree, we need to convert numeric data into discretized or segmented groupings. For instance, we would not want to use age but instead categories of age like “youth”, “teen”, “young adult”, “adult”, “senior”.
True
Which of the following forms of secure communication protocol/software is used specifically for wireless communication? TLS, SSH, SSL, WPA2, HTTPS
WPA2
Which of the following forms of RAID is not used because the redundancy information is too time consuming to compute efficiently? 2, 0, 3, 1, 4
2
True or false. The Unix operating system has no security holes in it, unlike Windows.
False
Some organization are using biometrics in place of or in addition to passwords to support the idea of ...
… who you are.
The idea of only backing up files that have changed since the last backup is known as a(n) ____ backup. measurable, timely, temporal, incremental, occasional
incremental
In OLAP, which of the following techniques allows you to move from a multi-dimensional view of the data to a single dimensional view of the data?
dicing
drilling down
pivoting
slicing
drilling up
slicing
In OLAP, which of the following techniques allows you to alter the perspective of the data records, for instance instead of focusing on yearly records, seeing the records broken down by products?
dicing
drilling down
pivoting
slicing
drilling up
pivoting
We should think of information as ...
... interpreted data.
... processed knowledge.
... sorted data.
... confidential data.
... stored data.
… interpreted data.
An intranet LAN has which of the following properties?
All communication is encrypted.
The LAN uses IP to easily extend the network to the Internet.
All resources use wireless communication.
The network uses one-to-many network address translation.
The network uses no routers.
The LAN uses IP to easily extend the network to the Internet.
Of these RAID levels, which uses the smallest possible stripe sizes? 5, 1, 4, 3, 0
3
Projections, restrictions and joins collectively are forms of database ...
… queries.
Encryption supports ...
confidentiality
authenticity
integrity
availability
all of the above
confidentiality
The best way to protect the vulnerabilities of the human in IT is through ...
paying higher salaries
monitoring (such as camera)
strong passwords
training
... access control
training
True or false. In rule association learning, a high frequency always means a useful rule.
False
RAID technology uses which of the following?
the Internet
encryption
cloud computing
hard disks
magnetic tape
hard disks
Which level of RAID provides redundancy in the form of a complete duplicate (mirror) of the data? 5, 0, 1, 6, 3
1
Of these forms of RAID, which one offers no redundancy at all?
1
0
2
3
none of these: they all offer redundancy.
0
What method is often used to determine closeness in clustering?
Euclidean distance formula
Which of the following is a form of protocol attack?
Phishing
TCP hijacking
Buffer overflow
They are all forms of protocol attacks.
SQL injection
TCP hijacking
True or false. A decision tree can be generated automatically from a database of records.
True
To support confidentiality of data stored in files, we might want to implement ...
All of the above.
... physical security like guards and cameras.
... access control (permissions).
... redundancy.
... backups.
... access control (permissions).
True or false. Law enforcement uses data mining to identify possible crime “hot spots” in their city to predict where future crimes might occur.
True
Why was Y2K an issue?
Early programmers used 2 digits to store the year.
A database projection returns _____ of a database relation.
specific fields of some records that match given criteria
all fields of some records that match given criteria
all fields of all records
None of the above: the projection modifies data, it does not return data.
specific fields of all records
specific fields of all records
database is commonly a collection of ...
... relations.
... data marts.
... relationships.
... fields.
... records.
… relations.
Assume that we have 1000 store receipts and of those, we find 500 receipts include the purchase of beer. Of those 500, 400 indicate that the person also bought pretzels. The frequency of the rule “if someone buys beer they will also buy pretzels” is ...
80%
True or false. When generating goals of an organization, you might find that some goals contradict or conflict with other goals requiring that they be prioritized.
True
Which of the following encryption algorithms has been declared as insecure?
MD5
AES
SHA-1
None of the above: they are all secure forms.
DES
DES
The idea that collected data are correct and accurate is known as ...
availability
confidentiality
assurance
integrity
authenticity
integrity
Which of the following is not a threat that involves an individual in an organization but instead is a threat to the technology itself?
insider attack
protocol attack
phishing
They all involve individuals.
social engineering
protocol attack
When combining data from various databases into a data warehouse, which process might be required?
Data visualization
Data transformation
Data matching
Slicing
Data mining
Data transformation
True or false. As an IT person, you may be asked to write or help write organizational policies with respect to IT usage.
True
True or false. One learns as much with a 2-year technical degree as one does with a 4-year bachelor’s degree in IT.
False
Which of the following certifications would a system administrator pursue?
Novel CNA
MSCDA
CIW
Novel CNE
CCNA
Novel CNA
The lowest paying career in IT would probably fall on the ...
... computer technician.
... web administrator.
... system administrator.
... software engineer.
... database administrator.
... computer technician.
Which of the following careers would benefit most from having a master’s degree?
Database administrator
Network administrator
Web administrator
IT Manager
System administrator
IT Manager
Of the various IT related professions, which one of the following is seeing jobs decline instead of grow?
database administrators
network administrators
computer programmers
software engineers
system administrators
computer programmers
True or false. Computer programmer and software engineering have the same roles and duties.
False
Which of the following is not a soft skill?
a good listener
ability to troubleshoot
ability to write
self-supervising
team player
ability to troubleshoot
True or false. It is the IT person’s responsibility to monitor employees of the organization with respect to their IT usage.
False
True or false. As an IT employee of an organization, you should expect your employer(s) to support your efforts in continuing education by paying for you to take classes or travel to conferences and trade shows.
True
Note 
Flashcards (59)