Block 8

Question 1

In regards to interfacing which one has two conductors in a cable or interface share a common return path, sometimes referred to as a single ended system

Answer 1

Unbalanced Interface

Question 2

In regards to interfacing which one should only be used between short distances

Answer 2

Unbalanced Interface

Question 3

In regards to interfacing which one usually has two center conductors for the signal that have equal impedance to ground, sometimes surrounded by a shield

Answer 3

Balanced Interface

Question 4

In regards to interfacing which one makes the connection less susceptible to noise, which allows the interface to support higher data rates and support greater distances between devices

Answer 4

Balanced Interface

Question 5

One of the oldest and most commonly used standards for DTE to DCE interfacing is ________

Answer 5

RS-232C/EIA-232D

Question 6

__-__ supports speeds up to 20,000 bits per second in full or half-duplex mode

Answer 6

RS-232

Question 7

Normally the __-__ standard has the cable between the two devices no longer than 50 feet, but may be longer if load capacitance requirements are met.

Answer 7

RS-232

Question 8

__-__ is an unbalanced interface that normally supports asynchronous data flow and normally uses a 25-pin connector

Answer 8

RS-232

Question 9

The __-__ standard is setup to have the pin connector (male) used on the DTE device, while the socket connector (female) is used on the cable coming from the DCE

Answer 9

RS-232

Question 10

What offers transmission rates of 20 Kbps at 4000 feet to 2 Mbps at 200 feet andis a balanced interface

Answer 10

RS-530

Question 11

True/False

Is the RS-530 used for both asynchronous and synchronous interfaces?

Answer 11

True

Question 12

This standard, developed by the ITU –T, is a high-speed interface for data transmission of 1.2 Kbps at 3000 feet to 2Mbps at 50 feet

Answer 12

V.35 Standard

Question 13

DATA SIGNALS are sent BALANCED and CONTROL SIGNALS are sent UNBALANCED, typically at a max of 10 volts peak to peak

Answer 13

V.35 Standard

Question 14

This standard is sort of a hybrid between balanced and unbalanced

Answer 14

V.35 Standard

Question 15

This standard is is typically used to interface a DTE or DCE device to a high-speed digital carrier device.

Answer 15

V.35 Standard

Question 16

What is the standard that specifies both the physical and electrical properties of twisted pair cable and connecting hardware

Answer 16

EIA/TIA-568-B

Question 17

Which standard allows data communications up to 1 Gbps?

Answer 17

EIA/TIA-568-B

Question 18

_______ ______ express information by discretely changing the voltage on the transmission line.

Answer 18

Digital signals

Question 19

Which digital signal format has only ONE polarity with respect to zero volts

Answer 19

Unipolar Format

Question 20

Which digital signal format has TWO polarities, one positive and one negative?

Answer 20

Bipolar Format

Question 21

Which digital signal format ALTERNATES the digital 1s from positive to negative polarity?

Answer 21

Alternate Mark Inversion Format

Question 22

Which digital signal format has each bit return to the 0V?

Answer 22

Return-To-Zero (RZ)

Question 23

Which digital signal format does not allow the signal level to return to 0V between successive bits or during the bits duty cycle or bit time.

Answer 23

Non-Return-To-Zero Format (NRZ)

Question 24

Which digital signal format is is an analog signal that has digital information coded on to it?

Answer 24

Quasi-analog

Question 25

In regards to Digital Timing Methods what refers to TIME and is synchronized by the use of stop-and-start bits

Answer 25

Asynchronous Timing

Question 26

___________ is slower than synchronous transmission and is not as efficient in code transmission because of the added synchronizing stop-and-start bits.

Answer 26

Asynchronous Timing

Question 27

Which Flow control is sometimes referred to as RTS (Request-to-send) / CTS (Clear-to-Send) flow control?

Answer 27

Hardware Flow control

Question 28

Which Flow control is known under the name XON-XOFF (“transmit on” and “transmit off”) flow control?

Answer 28

Software Flow control

Question 29

In ___________ timing data is transmitted in continuous streams with reference to an external clock signal. Also, the receiving device is clocked at exactly the same rate as the transmitter.

Answer 29

Synchronous Timing

Question 30

Synchronous communication places a header in front and a trailer at the end of each frame to synchronize the data flow through the system. The content of the header and trailer is dependent upon the protocol that is used.

Answer 30

Flow Control

Question 31

What is this in reference to? Synchronous protocols use an error checking sequence such as Cyclic Redundancy Check (CRC) or Frame Check Sequence (FCS).

Answer 31

Error Control

Question 32

In ___________ Timing data is transmitted in continuous streams, but WITHOUT an external clock signal.

Answer 32

Isochronous Timing FaceTime/Skype

Question 33

What is the speed at which information moves across the media

Answer 33

Signal Rate | Speed Limit

Question 34

What is the amount of time a digital signal is left at a particular voltage level to indicate a value?

Answer 34

Bit Interval/Bit Time

Question 35

What s the time it takes to send a character, including any start and stop bits?

Answer 35

Character Interval

Question 36

What is a measurement of the signaling speed of a data transmission device and is equivalent to the maximum number of signaling elements (symbols) sent per second?

Answer 36

Baud Rate | How fast it COULD go

Question 37

What is a measure of throughput or rate of data transfer and represents the number of bits that are transmitted within a second and it is measured in bits per second (bps or b/s)

Answer 37

Bit Rate | How fast the bits ARE going

Question 38

What is nothing more than counting the number of bits received in a specific time interval (usually one second)?

Answer 38

Bit Count Integrity

Question 39

Explain the Telecommunications Request (TR)

Answer 39

AF Form 3215 or electronic equivalent is filled out. Then the SCF uses that info to fill out the TR. Next it's routed to the MAJCOM Telecommunication Certifications Office (TCO) who will certify and validate the TR. Once the certification of the TR has been completed, a Telecommunication Service Request (TSR) will be prepared in accordance with DISA

Question 40

Explain the Telecommunications Service Request (TSR)

Answer 40

The TSR is a request for service that details the type of services (NIPRNET, SIPRNET, JWICS, GCCS, DVSG, etc.), service locations, and other pertinent information required to specify parameters to the agency or commercial carrier providing the service. Once the TSR is completed, the TCO updates the information in DISA Direct. Next, the TSRs will be routed and submitted via DISA Direct to the DISA action activity/agency responsible for providing the required service and to other agencies/units as necessary.

Question 41

Explain what a Telecommunications Service Order (TSO) is

Answer 41

It's a document prepared by DISA to authorize SCFs and other government facilities to make the circuit activations, deactivations, or changes the user requested. In the case of a new or changed circuit, DISA coordinates with the National Communications System Telecommunications Service Priorities (NCSTSP) Program Office to get provisioning and restoration priorities assigned or updated. Once all the engineering is complete and all the information is gathered, DISA produces a TSO that is distributed to all the affected SCFs and other agencies directing them to proceed

Question 42

What is a purpose of TSP?

Answer 42

To allow users of our nation’s most important telecommunications services of the National Security and Emergency Preparedness (NS/EP) system to receive treatment on a priority basis.

Question 43

In regards to TSP What is the process of providing telecommunications service to a user is called? (PRP)

Answer 43

PROVISIONING

Question 44

In regards to TSP ____________ is the process of returning a defective circuit back to operation through either repair or alternate routing (PRP)

Answer 44

RESTORATION

Question 45

In regards to TSP _______ involves “appropriating” a circuit of lesser importance (lower priority) to allow a higher priority user to communicate. (PRP)

Answer 45

PREEMPT

Question 46

What two parts is the TSP broken down into?

Answer 46

TSP Control Identifier and the TSP Code

Question 47

How is the TSP Control Identifier and the TSP Code separated?

Answer 47

The tenth position is ALWAYS a hyphen, which simply serves to separate the TSP control ID and the TSP code.

Question 48

What are the acceptable values for the PROVISIONING priority field (position 11)?

Answer 48

E, 1, 2, 3, 4, 5, and 0