Flashcard decks

it final 2023

115 flashcardsby pinkstarfish777E
Study these flashcardsFree · spaced repetition · iPhone, Android, Mac & web

All cards

1
Which of the following devices would transmit any message received on to all computers in its local area network?
repeater
2
A jam signal is used in an Ethernet network to ...
... inform all computers on the network of a collision.
3
IPv4 addresses are _____ bits long.

32
4
Long distance communication (dozens, hundreds or thousands of miles) generally does not use which of the following?
fiber optic cable
5
In OSI, only header information is affixed at each layer but in TCP/IP, both header and footer information can be affixed.
True
6
The ability of a network to carry multiple messages at the same time is known as ...

... multiplexing.
7
Last mile technology is used to express the idea that ...

... some households still use low bandwidth telephone lines to access the Internet.
8
Which of the following terms is used to denote a computer you wish to access over a network?

Remote computer
9
Which level of the OSI model performs routing?

Network
10
The number of computers on the original ARPAnet was ...

4
11
A network with a file server which services the local computers would be considered a(n) ...
... client-server network.
12
“T” connectors are used to join computers together in which type of network topology?

bus
13
The first message broadcast on the Internet, in its earliest incarnation, was in which year?

1969
14
If a computer were to go off line in a network, which of the following topologies would most likely be impacted by this?

ring
15
We can think of the Internet and the World Wide Web interchangeably.
False
16
The full mesh network is seldom used because ...
... it costs the most.
17
TCP/IP’s link layer is roughly equivalent to the OSI model’s ...
... physical and data link layers.
18
Twisted wire pair is most commonly used in which of the following?
In the public telephone network in the US
19
In streaming audio and video, which of TCP and UDP would be preferred as it would trade off speed for assurance of arrival?
TCP
20
TCP/IP introduced which of the following communication ideas?
three-way network handshake
21
Which of the following services is used to map IP aliases to IP addresses?
dns
22
We view computer networks at a logical level while the operating system views the network at a physical level.
False
23
In order to determine if another computer is available and accessible over your network, you might use which program to test it?
ping
24
Which of the following devices deals with IP addresses?
router
25
To use the telephone network for computer communication, one must ...

... convert the analog information stored in the computer into a digital form.
26
A network port ...
... indicates the message’s intended application software.
27
At which level of the OSI model are data units decomposed into packets?
Data link
28
IPv4 offers approximately how many unique IP addresses?

4 billion
29
Morris’ Internet worm was an attempt to ...
... demonstrate weaknesses in Unix security.
30
In a Linux system, the address(es) of your DNS servers will be stored in which file?
/etc/hosts.conf
31
Each layer of the OSI model adds header information onto the message except for the ...
... Physical layer.
32
Which level of the OSI model takes care of reliability?
Transport
33
An intranet LAN has which of the following properties?
The LAN uses IP to easily extend the network to the Internet.
34
In a circuit switched network, the pathway between devices is established before communication commences and is retained for the duration of the communication.

True
35
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.
36
A checksum is used in network communication for which purpose?

Error checking
37
A Class C network has how many IP addresses available for the network?

256
38
Which of the following technologies differentiates a normal extranet from a virtual private network?

encryption
39
Switches use which of the following addresses to send a message to the proper device?
MAC addresses
40
Which of the following network topologies is generally considered the cheapest?

bus
41
Which mathematical operation is used to obtain the checksum once the sum of the bits is computed?
modulo
42
Mapping an external IP address into an internal IP address is known as ...
... network address translation.
43
Which of the following network programs sends information in clear text and so is not secure?

All of the above except ssh (ftp, telnet, and rlogin)
44
SSL, the secure sockets layer, is an implementation of which level of the OSI model?

Presentation
45
In which protocol can you use UDP type packets?
TCP
46
What noteworthy event happened to the APRANet in 1973?

The first international computer was added to the network.
47
The Internet uses packet switching while local area networks use circuit switching.
False
48
As a network gets larger (has more computers connected to it), which of the following network topologies performance is most affected?
ring
49
Of the following network types (sizes or classifications), which is generally considered the smallest?
PAN
50
In a 3-D nearest neighbor network, a computer would directly connect to how many neighbors?
3
51
A decision tree can be generated automatically from a database of records.
True
52
Which of the following forms of RAID is not used because the redundancy information is too time consuming to compute efficiently?
2
53
Some will refer to wisdom as an understanding of ...
... why.
54
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?
pivoting
55
The goal of availability often can conflict with the goals of confidentiality and integrity.

True
56
An intranet LAN has which of the following properties?
The LAN uses IP to easily extend the network to the Internet.
57
Why was Y2K an issue?
Early programmers used 2 digits to store the year.
58
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
59
database is commonly a collection of ...

... records.
60
A database projection returns _____ of a database relation.

specific fields of all records
61
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
62
The idea of only backing up files that have changed since the last backup is known as a(n) ____ backup.

incremental
63
In rule association learning, a high frequency always means a useful rule.
False
64
Some organization are using biometrics in place of or in addition to passwords to support the idea of ...
... who you are.
65
When generating goals of an organization, you might find that some goals contradict or conflict with other goals requiring that they be prioritized.

True
66
Which of the following forms of secure communication protocol/software is used specifically for wireless communication?

WPA2
67
Of these forms of RAID, which one offers no redundancy at all?
0
68
RAID technology uses which of the following?
hard disks
69
Of these RAID levels, which uses the smallest possible stripe sizes?
3
70
The best way to protect the vulnerabilities of the human in IT is through ...

training
71
Encryption supports ...

... confidentiality.
72
Symmetric key encryption is also known as ...
... private key encryption.
73
In order to demonstrate that you are an authentic operator, your web site should use ...

... digital certificates signed by a certificate authority.
74
A company may draw upon multiple sources to build their data warehouse. Which of the following would not be one of those sources?

All of the above are possible sources. (Sales records, marketing reports, enterprise resource planning systems, and project reports)
75
Law enforcement uses data mining to identify possible crime “hot spots” in their city to predict where future crimes might occur.

True
76
The Unix operating system has no security holes in it, unlike Windows.

False
77
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
78
To support confidentiality of data stored in files, we might want to implement ...
... access control (permissions).
79
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?
slicing
80
Which level of RAID provides redundancy in the form of a complete duplicate (mirror) of the data?
1
81
When combining data from various databases into a data warehouse, which process might be required?
Data transformation
82
Which of the following encryption algorithms has been declared as insecure?
DES
83
The idea that collected data are correct and accurate is known as ...

... integrity.
84
All information systems are stored on computer.
False
85
We should think of information as ...

... interpreted data.
86
What method is often used to determine closeness in clustering?

Euclidean distance formula
87
Projections, restrictions and joins collectively are forms of database ...
... queries.
88
Which of the following is not a threat that involves an individual in an organization but instead is a threat to the technology itself?

protocol attack
89
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%
90
Which of the following is a form of protocol attack?

TCP hijacking
91
It is the IT person’s responsibility to ensure that all employees of the organization act ethically when using computers.
False
92
It is important for all IT people to act ethically when using computers.
True
93
Of the various IT related professions, which one of the following is seeing jobs decline instead of grow?
computer programmers
94
The lowest paying career in IT would probably fall on the ...
... computer technician.
95
Which of the following is not part of the 10 Commandments of computer ethics?
Thou shalt not use work computers for personal purposes.
96
Which of the following careers would benefit most from having a master’s degree?
IT Manager
97
Which of these IT roles would most need knowledge of using scripting languages like ASP, Perl and PHP?

Web developer
98
As an IT person, you may be asked to write or help write organizational policies with respect to IT usage.
True
99
It is the IT person’s responsibility to monitor employees of the organization with respect to their IT usage.
False
100
Which of the following certifications would a system administrator pursue?
Novel CNA
101
Which of these IT roles would most need knowledge of such software as MySQL and Oracle?
Database administrator
102
One learns as much with a 2-year technical degree as one does with a 4-year bachelor’s degree in IT.
False
103
The web administrator and the web developer have the same roles and duties.
False
104
Which of the following careers would require knowledge of criminal justice?
computer forensics
105
Which of the following terms applies to the idea that the company ensures the integrity of their collected data and the computer systems?
security
106
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
107
Which of these IT roles would most need knowledge how to install computer hardware and software?

System administrator
108
Which of the following IT roles would most likely work at the help desk?
Computer support specialist
109
Which of these IT roles would be in charge of securing a computer network?
Network administrator
110
Most IT people will stay abreast to changes in the IT field by reading technical journals published by such organizations as ACM and IEEE.
False
111
Computer programmer and software engineering have the same roles and duties.

False
112
Someone in information systems (IS) would learn which of the following skills that differ from most other IT areas?

business practices
113
Which of the following is not a soft skill?
ability to troubleshoot
114
Which of these IT roles would most need knowledge of VoIP and trunking protocols?

Network administrator
115
It is strictly illegal for a company to have an IT policy prohibiting users from having to disclose their Facebook passwords to their employers.

False
Study all 115 cards for free