Block Vii - Mobile, Space & Satellite Networks

Front 1

What are the three main types of RFID tags?

Back 1

Passive
Semi-passive
Active

Front 2

A type of RFID tag that does not contain a battery; power is supplied by the reader.

Back 2

Passive

Front 3

List the major disadvantages of a passive RFID tags.

Back 3

- Tag can be read only at a very short distances.
- Some sensors may require more power than available
- The tag remains readable for a very long time

Front 4

List the advantages of a passive RFID tag.

Back 4

- Tag functions without a battery
- Tagis typically much less expensive to manufacture
- Tag is much smaller

Front 5

What is an RFID transponder that reflects RF energy back to the reader similar to passive but also has a power source onboard to run chip circuitry and potentially, an onboard sensor.

Back 5

Semi-passive

Front 6

__________ management frames enable stations to establish and maintain communications?

Back 6

802.11

pg.35

Front 7

802.11 ____________ is a process whereby the access point either accepts or rejects the identity of the client.

Back 7

authentication

pg.35

Front 8

With _____________ authentication, the client sends only one authentication frame and access point responds with an authentication frame as a response indicating acceptance or rejection.

Back 8

open system (the default)

pg.35

Front 9

With the optional _____________ authentication, the client sends an initial authentication frame and the access point responds with an authentication frame containing challenging text.

Back 9

shared key

pg.35

Front 10

How many 802.11 management frames are described in the text and name them.

Back 10

6 Management frames
1) Authentication/Deauthentication Frame
2) Association Request/Response Frame
3) Reassociation Request/Response Frame
4) Disassociation Frame
5) Beacon Frame
6) Probe Request/Probe Response Frame

There are other 802.11 management frames that are not described within the text: Action Frame for QoS and ATIM.

pg.35-36

Front 11

What is an RFID tag that is equipped with a battery that can be user as a complete source of power for the tag's circuitry and potentially, an onboard sensor.

Back 11

Active

Front 12

List the major advantages of an Active RFID

Back 12

- Can be read at distances of 100ft or more
- It may have other sensors that can use electricity for powers

Front 13

List the disadvantages of an Active RFID

Back 13

- Tag cannot function without battery
- Tag is typically more expensive
- Tag is physically larger
- Long term maintenance cost for an Active RFID can be greater than passive
- Battery outages in an active tag can result in costly misread

Front 14

What are the two major components of an RFID tag

Back 14

- Integrated Circuit
- Antenna

Front 15

This component of the RFID tag that is used for storing and processing information and modulating and demodulating the RF signal

Back 15

Integrated Circuit

Front 16

How does passive and semi-passive tags communicate?

Back 16

Inductive or Backscatter coupling

Front 17

What are based upon a transformer-type coupling between the primary coil in the reader and the secondary coil in the transponder?

Back 17

Inductively Coupled Systems

Front 18

When a proportion of the incoming RF energy is reflected by the antenna and reradiated outwards, this can be attributed to what type of coupling?

Back 18

Backscatter Coupling

Front 19

A station sends a _____________________ frame to another station if it wishes to terminate secure communications.

Back 19

deauthentication

pg. 35

Front 20

802.11 __________ enables the access point to allocate resources for and sychronize with a radio NIC.

Back 20

association

pg.35

Front 21

After receiving the association request, the acess point considers associating with the client, and (if accepted) reserves ___________ and establishes an ___________ for the client.

Back 21

memory space, association ID

pg.35

Front 22

An 802.11 access point sends an association response frame containing an ____________ or ____________ notice to the client requesting association.

Back 22

acceptance, rejection

pg.35

Front 23

If the 802.11 access point accepts the client, the frame includes information regarding the association, such as ______________________ and supported _______________.

Back 23

association ID, data rates

Front 24

RFID Exploits/attacks: How do infections spread?

Back 24

Overwriting a blank RFID tag with malicious logic/viruses and having it re-scanned infecting the database corrupting or changing information and accessing the interconnecting management infrastructure

Front 25

What is Radio Over Internet Protocol (ROIP)?

Back 25

A method of communication that links voice, radio, and computers

Front 26

What is the backbone of ROIP?

Back 26

IP-based network

Front 27

How do operators get past the Line of Sight deficiency?

Back 27

Strategically placed radios with overlapping RF coverage

Front 28

WHat allows interoperability of disparate radio platforms?

Back 28

ROIP because it uses IP as a transport medium and IP is a universally understood language

Front 29

If a 802.11 client roams away from the currently associated access point and finds another access point having a stronger beacon signal, the client will send a _________________________ frame to the new access point.

Back 29

reassociation request

pg. 36

Front 30

A 802.11 client sends a __________________ frame containing an acceptance or rejection notice to the client requesting reassociation.

Back 30

reassociation response

pg. 36

Front 31

A 802.11 station sends a ____________________ frame to another station if it wishes to terminate the association.

Back 31

disassociation

pg. 36

Front 32

The 802.11 access point periodically sends a ___________ frame to announce its presence and relay information, such as _____________, ___________, and other parameters regarding the access point to any client that is within the range.

Back 32

beacon, timestamp, SSID

pg. 36

Front 33

Mobile wireless communications systems; have specific frequency allocations, systems are traditionaly closed, private networks that are designed to allow communications between a fixed base station and multiple mobile users.

Back 33

LMR

Front 34

Three different types of radio terminals are?

Back 34

Portable (user carried), Mobile (vehicle mounted), Fixed (not moving)

Front 35

Known as a fixed station that recieves a signal but does not re-broadcast the signal to other radio users in the system.

Back 35

Base Station

Front 36

A device that recieves radio signal to extend the coverage area.

Back 36

Repeater Station

Front 37

Is a combination of a radio reciever and a radio transmitter that recieves a weak or low-level signal and retransmits it at a higher level or higher power?

Back 37

Radio Repeater

Front 38

Area used for local communications, and are placed at low altidude to reduce interferance with other users of the same radio frequencies.

Back 38

Low-level repeaters

Front 39

Are placed on tall towers or mountain tops to maximize their area of coverage. With these systems, users with low-powered radios can communicate with each other over many miles.

Back 39

High-level repeaters

Front 40

Any structure or device used to collect or radicate electromagnetic waves. Convert signals between electrical and electromagnetic form.

Back 40

Antenna

Front 41

In a ____________, a single channel is dedicated to a specific group of users. Because everyone transmits and recieves on the same channel, the network is considered half-duplex. Each user must wait until others have stopped transmitting before they can use the channel for communication.

Back 41

Conventional LMR architecture

Front 42

Allows for the automatic sharing of multiple radio channels accross the network. Efficient, many people can carry many conversations over only a few distinct frequencies. Can link to other trunked networks, packet switched data networks or telephony networks.

Back 42

Trunked LMR architecture

Front 43

Base Station _________ coordinate the overall operation of the base station equipment and provide alarm monitoring or electromagnetic assemblies.

Back 43

Controllers

Front 44

Is the process where mobile radios transmit information to a wireless system to inform the system of its availability. It ensures that a radio is allowed, or registered, with the system.

Back 44

Autonomous Registration

Front 45

A continuous data stream that all radios monitor for communication negotiation. During normal operations, a computer assigns channels to this.

Back 45

Dedicated Control Channel

Front 46

Used to authenticate radios on the network, necessary for autonomous registration.

Back 46

Control Channel

Front 47

The most common LMR network interconnection is to the?

Back 47

PSTN

Front 48

Adapt the communcations between mobile radios and different types of data networks. Example of this is short message service (SMS)

Back 48

Gateways

Front 49

Are an extension of the phone system; they temporarily store and forward audio or fax messages.

Back 49

Voice Mail Systems

Front 50

Is the use of an object applied to or incorporated into an item for the general purpose of identification and tracking using radio waves.

Back 50

RFID

Front 51

At the basic level, an RFID system requires two components:

Back 51

RFID tag, RFID reader