6 Comms

Question 1

WAN

Answer 1

Country or world

Question 2

Metropolitan area network

Answer 2

City or suburb

Question 3

Local area network

Answer 3

Office, building

Question 4

Client-server LAN

Answer 4

Clients use server

Allows users to share files and programs

Question 5

Peer to peer LAN

Answer 5

No server
Less secure
Less stable

Question 6

Node

Answer 6

Any device attached to network -

Printers included

Question 7

Packets

Answer 7

Fixed-length block of data for transmission

1000 bytes

Question 8

Protocols

Answer 8

A set of conventions governing the exchange of data between hardware and software components in a network

Question 9

Switch

Answer 9

A device that connects computers to a network and facilitates communication by sending messages between send and receiver nodes

Question 10

Bridge

Answer 10

An interface used to connect two similar networks

Question 11

Gateway

Answer 11

An interface permitting communication between dissimilar networks

Question 12

Router

Answer 12

Specialized devices for transmitting data, physical devices that join multiple networks

Question 13

Backbone

Answer 13

The main highway - including gateways, routers - that connects all computer networks in an organization

Question 14

Topology

Answer 14

Layout of a network

Question 15

Star network

Answer 15

All computers and directly connected to a central network switch
Phone networks

Question 16

Ring network

Answer 16

All microcomputers are connected in continuous loop
If one stops working…
Flows one way

Question 17

Bus network

Answer 17

All nodes are connected to a single wire or cable.
Two endpoints, or terminators, which stop the network signal.
Each comms device on the network transmits electronic messages to other devices
Messages can collide without special software and hardware
Limited to 20 devices on 185 m cable
If one removed…

Question 18

Tree network

Answer 18

Bus network of star networks

University departments linked by main bus

Question 19

Mesh network

Answer 19

Each node has more than one connection to the other nodes
A message can take any possible shortest route
Internet

Question 20

Twisted-par wire

Answer 20

Phone line
2 strands of insulated copper wire
Slowest, 128 megabits/sec

Question 21

Coaxial cable

Answer 21

Insulated copper wire in metal shield and plastic
Cable TV and internet
Shielded

Question 22

Fiber optic cable

Answer 22

Up to 2 billion pulses per second

Question 23

Ethernet

Answer 23

Cat5

Requires cables, a few routers

Question 24

Phone line network

Answer 24

HomePNA tech

320 megabits/sec

Question 25

Power line

Answer 25

HomePlug | 200 megabits/sec

Question 26

Narrowband

Answer 26

For voice and phone

Question 27

Broadband

Answer 27

1 gigabit/sec

Question 28

Wireless application protocol

Answer 28

A standard designed to link all mobile devices to carrier’s wireless network

Question 29

Wireless types

Answer 29

``` IR Broadcast radio Cell radio Micro radio (Bluetooth) Communications satellites ```

Question 30

Satellites

Answer 30

Geo highest Meo 10 000 miles Leo 1000 miles

Question 31

Generations

Answer 31

``` 1 - analog cell 2 -digital cells and pdas 3 - smartphones 4 smarter phones LTE long term evolution ```

Question 32

Short-range wireless

Answer 32

LAN - to 228 feet. Wi-fi Personal area networks - to 33 ft. Bluetooth, wireless USB Home automation networks - to 150 ft.

Question 33

Wireless standards

Answer 33

802. 11b home 802. 11a business 802. 11g over 54 mbps 802. 11n over 600 mbs

Question 34

WiMax

Answer 34

Worldwide interoperability for microwave access | Up to 30 miles. More than wifi

Question 35

Ultra-wideband

Answer 35

Military radar

Question 36

Smart home

Answer 36

Insteon \zigbee Z-wave

Question 37

Trolls

Answer 37

Comments

Question 38

Hackers

Answer 38

``` Script kiddies Hacktivists - Anonymous Black-hat hackers Cyberterrorists Benign hackers Benevolent hackes ```

Question 39

Worm

Answer 39

Subclass of virus that copies itself repeatedly into computer’s memory

Question 40

Rootkit

Answer 40

Secret program installed in OS so someone can take control

Question 41

Zombie

Answer 41

Computer taken over covertly and programmed to respond to instructions sent remotely

Question 42

Botnet

Answer 42

Robot network waiting for commands

Question 43

Pharming

Answer 43

Malicious software in your computer redirects you to an impostor web page

Question 44

Evil twin attack

Answer 44

Fake wifi hot spot that your computer thinks offers safe access to a secure public network and then monitors your communications and steals data you input

Question 45

CERT

Answer 45

Computer emergency response team | USDDept

Question 46

Tools for fighting online fraud

Answer 46

``` Rule-based detection software Predictive statistical model software Employee internet management software Internet filtering software Electronic surveillance ```

Question 47

Prism

Answer 47

Uses online data from 9 companies - google, fb, apple about the online activity of customers

Question 48

XKeyscore

Answer 48

Allows analysts to search with no authorization through dbs containing emails, chats, browsing histories

Question 49

FISA court

Answer 49

Foreign intelligence surveillance act court, | Group of 11 judges responsible for making decisions about gvt surveillance in ns cases

Question 50

Nsa

Answer 50

Gathers intell by targeting computers and comms of foreign entities Protects nsa’s and military’s computers Mines metadata

Question 51

Privacy and civil liberties oversight board

Answer 51

No power

Question 52

Tailored access operations unit

Answer 52

Harvests from overseas networks

Question 53

Switch

Answer 53

Transfers data packets between 2 networks

Question 54

Not a standard

Answer 54

802.11ac

Question 55

RAID 0

Answer 55

Automatically duplicates your data and saves it on 2 identical drives

Question 56

SDRAM

Answer 56

The most common type of RAM in current systems

Question 57

Virus

Answer 57

Means same thing as worm