Computer Structure Final 2 Flashcards

1
Q

An OS is a program which acts as an…… between what and what ?

A

interface between computer system users and the computer hardware

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2
Q

The OS provides a …….in which a user may ……

A

It provides a user friendly environment in which a user may easily develop and execute programs

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3
Q

If not for the OS Hardwar knowledge would be….

A

Mandatory for computer programming

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4
Q

The OS hides…

A

the complexity of hardware from uninterested users!

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5
Q

What is an Operating System?

A
Software which manages the overall operation of the computer system including:
Hardware( CPU, RAM, I/O)
Security 
System interface
application interface
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6
Q

What is First Generation ?

A

Vacuum tube, single user, early operating systems

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7
Q

What is Second Generation?

A

Job scheduling, JCL, faster I/O, spooling, batch, files

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8
Q

What is Third Generation?

A

Shared processing, multiprogramming, virtual memory, DBMS

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9
Q

What is Fourth Generation?

A

Distributed computing, personal computers, high-speed communication, multi-media

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10
Q

What are the functions of an operation system? name 4

A

Manages and interacts with computer hardware
Provides and manages system security
Provides the system interface
Provides the interface for application software

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11
Q

Who created Linux

A

Linus Torvalds

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12
Q

Tell me three important features of Linux

A
  1. Scientific cooperation model
  2. Open source implications
  3. Matured over 14 years
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13
Q

What is the internet?

A

The largest network of networks in the world
Uses TCP/IP protocols and packet switching
Runs on any communications substrate

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14
Q

Name two examples of Social engineering

A
  1. An attacker calls a user on a network and claims they are from the computer support division of the network.
  2. The attacker tells the user that they are having trouble with their account and then ask for the user’s name and password
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15
Q

Define a dictionary attack

A

uses know passwords and many variations (upper and lower case and combinations ) to try to log in to your account

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16
Q

Define brute force attack

A

means the attackers uses every possible combination of characters for the password

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17
Q

Name some ways to prevent password cracking name 6

A

1.Don’t use passwords that are dictionary words
2.Don’t use your user name
3.Don’t use your user name backwards
4Limit the number of log in attempts
5.Make your password sufficiently long with an alpha numeric combination
6. Change passwords often

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18
Q

name a way to enhance security with strong passwords

A

A sentence

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19
Q

Biometrics technology can be used for what two different purposes

A

Verification and identification

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20
Q

Name five different biometric verifications

A
  1. Fingerprinting matching
  2. hand geometry
  3. Iris or retinal scans
  4. Speech recognition
  5. Face recognition
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21
Q

What is a Hacker?

A

Anyone who unlawfully accesses a computer system

22
Q

Name the types of Hackers?

A

White hat “ just helping”
Black hat “ give me that”
Script Kiddies “ show me”

23
Q

What do hacker do?

A

Steal information from computers
Internet packer sniffing
Commit identity theft

24
Q

What are some Hacker tool?

A

Worms
Trojan Horses
Bombs

25
Name some Denial of Service Attacks
Back door program: Trojan horse-Zombies | Denial of service attacks
26
What is a Virus?
A Virus is a piece of malicious piece of code that when run on you machine will open a backdoor to the machine, might start a program that attacks other applications.
27
What are worms?
Are a type of computer virus that typical proliferate by themselves
28
Today how are most viruses exchanged?
Via attachments via email
29
What is Antivirus Software?
Programs designed to detect viruses | detect know viruses
30
What is a Firewall?
Acts as a security gateway between two networks: usually between trusted and untrusted networks
31
Why are Firewalls needed?
Prevent attacks from untrusted networks Protect data integrity of critical information Preserve customer and partner confidence
32
What are the basic components of a network?
Connections (Physical Medium) Protocols (Common Language) Services ( Clients, Servers, and Files)
33
The Client is........
the computer that requests to use a resource
34
The Server is ..........
the computer that provides the resource
35
Name some features Peer-to-Peer network
No centralized data access | Security handled by assigning each resource a password
36
Name some features Client/Server network
Centralized data access Centralized security Centralized administration, record keeping, and control
37
The Physical Media can be:
Wire, Fiber Optic Cable, Wireless Link (RF and Infrared)
38
In Networking, Protocols are: (Names three)
Agreements that describe how things work Industry-wide frameworks that describe every aspect of communications between computers Grouped together into Protocols Suites
39
What are the Main Protocol Suites:
NetBEUI- Small Microsoft networks SPX/IPX- Primarily Novell networks TCP/IP- Must be used if the network is to connect to the internet
40
What is one of the basic ways to classify networks?
by their topology
41
Topology refers to............
the way the computers in the network are connected to each other
42
What are the most common topologies:
Bus, Star, Ring, Mesh
43
What is another way to classify networks
by their size or geographical span
44
Name the most common size classifications:
Local Area Network- LAN Metropolitan Area Network- MAN Wide Area Network- WAN
45
Name Some components?
Network Operating System Interface Cards Cables
46
What are the Major Network Operating Systems?
Unix (Linux) Novell NetWare Windows Server
47
What does NIC stand for
Network Interface Card
48
The NIC is the main interface between the ________ and the _______
The NIC is the main interface between the computer and the network cable
49
What is the NIC also called: (Name three)
The Network Card Network Adapter Network Adapter Card
50
Name three types of cables
Twisted-Pair Coax Fiber Optic
51
Name two types of Twisted-Pair cables
UTP- Unshielded Twisted-Pair | STP- Shielded Twisted-Pair