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BSCPE3-01 > CPE 041 DATACOM P3 > Flashcards

CPE 041 DATACOM P3 Flashcards

1
Q

Computer communication

A

Data Communications

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2
Q

Protocol

A

Sysntax
Semantics
Timing

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3
Q

Standards

A

De Facto
De Jure

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4
Q

Market Driven Standards

A

De Facto

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5
Q

Legislated by organized body

A

De Jure

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6
Q

Standards Organization

A

IEEE
ITU-T
TIA
EIA
ANSI

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7
Q

IEEE Standard Organization

A

8021 Bridging and Management
80.2.2 logic Link Control
802.3. Ethernet-CSMA/CD Access Method
802. 4 Token Passing Bus Access Method
802.5 Token Ring Access Method
802.6 Distributed Queue Dual Bus Access Method
802.7 Broadband LAN
802.8 Fiber Optic
802.9 Integrated Services LAN
802.10 Security
802.11 Wireless LAN
802 12 Demand Priority Access POZ. 14 Medium Access Control 802.15 Wireless Personal Area Network
802.16 Broadband Wireless Metro Area Network
802.17 Resilient Packet Ring

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8
Q

Network Criteria

A

Performance
Reliability
Security

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9
Q

Four Fundamentals Characteristics of Data Communications

A

Delivery
Accuracy
Timeless
Jitter

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10
Q

Transmission Mode

A

Simplex
Half-Duplex
Full-Duplex

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11
Q

one direction

A

Simplex

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12
Q

both direction but not same time

A

Half-Duplex

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13
Q

both direction at the same time

A

Full-Duplex

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14
Q

acts as the source of destination

A

Data Terminal Equipment

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15
Q

used to establish, maintain, and terminate communication network
sessions between a data source and it’s destination

A

Data Communications Equipment

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16
Q

a device used to convert serial digital data from a transmitting terminal to a signal suitable for transmission over a telephone channel, or to reconvert the transmitted signal to a serial digital data for acceptance at the receiving terminal

A

Modem (modulator-demodulator)

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17
Q

Advantages of Modems

A

-easier to multiplex
-easier to integrate in to a switching system
-easy to interface with other digital equipment
-noise immunity
-better performance monitorability
-easy to encode, decode, encrypt, and scramble

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18
Q

Disadvantages of Modems

A

-large bandwidth
-need for synchronization
-need for additional equipment
- not compatible with existing system
-need for AD/DA conversion
-restriction in wired topology

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19
Q

concerns with the physical configuration of the devices and the cable that it connects. It is the architecture or physical layout of the network

A

Data Network Topology

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20
Q

consists of nodes string together in series with each node connected to a long cable or bus; many nodes can tap into the bus and begin communication with all other nodes on that cable segment

A

Bus Topology

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21
Q

-bucket or token passing
-signals are transmitted in a rotating fashion
-tokens give stations the “right to transmit” messages

A

Ring Topology

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22
Q

-how the nodes are connected

A

Physical Topology

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23
Q

-how data is transmitted

A

Logical Topology

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24
Q

-features a central controller to which all nodes are connected

A

Star Topology

25
Q

-variation of star topology, it contains multiple bus

A

Tree Topology

26
Q
  • the devices are connected redundantly with each other
A

Mesh Topology

27
Q

formula to know how many cables should be use

A

C=(N(N-1))/2

28
Q

Network Breadth

A

Local Area Networks (LAN) Metropolitan Area Networks (MAN) Wide Area Networks (WAN) Global Area Networks (GAN)

29
Q

collection of independent computers which can communicate with one another over a shared medium, usually conf to a small geographical area, such as a single building or a college campus

A

Local Area Network (LAN)

30
Q

PAN
SAN
VPN
EPN

A

PAN - Personal Area Network
SAN - Storage Area Network
VPN- Virtual Private Network
EPN - Enterprise Private Network

31
Q

-consists of a computer networks across an entire city, college campus or small region

A

Metropolitan Area Network (MAN)

32
Q

-occupies a very large area, such as an entire country or the entire world

A

Wide Area Network

33
Q

a global computer network that connects thousands of networks together allowing them to exchange files, send messages, download, graphics and text, and share other resources

A

Internet

33
Q

-categories and identifiers the pointer or number of location

A

Network Configuration

34
Q

-provides a dedicated link between two devices

A

Point-to-Point

35
Q

-more that two specific devices share a single link

A

Multipoint

36
Q

Data Transmission

A

Serial
Parallel

37
Q

-sends only one bit at a time

A

Serial

38
Q

-chunk of data is sent at the same time

A

Parallel

39
Q

Serial Transmission

A

Synchronous
Asynchronous

40
Q
  • eliminates the need for start and stop bits
A

Synchronous

41
Q

-one character is transmitted at a time
-transmission is controlled by start and stop bits at the beginning and end of each character

A

Asynchronous

42
Q

In serial transmission ______is faster than ___________

A

Synchronous
Asynchronous

43
Q

-transmission in which data are sent at a fixed rate, with the receiver and transmitter synchronized
-synchronized transmission eliminates the need for start and stop bits

A

Synchronous

44
Q

is the transmission of information from one or more source to one more destination over the same transmission medium

A

Multiplexing

45
Q

splits the available bandwidth for a given communication link into a number of chanels

A

Frequency Division Multiplexing

46
Q

splits up the capacity of the line by assigning each user a particular timeslot

A

Time Division Multiplexing

47
Q

Different kind of Multiplexing

A

Frequency Division Multiplexing
Time Division Multiplexing
Synchronous / Statical TDM
Asynchronous / Statical TDM
Frequency Hopping Spread Spectrum
Direct Sequence Spread Spectrum

48
Q

Seven OSI Layer

A

Physical Layer
Data Link Layer
Network Layer
Transport Layer
Session Layer
Presentation Layer
Application Layer

49
Q

File Transfer :File Transfer Protocol (FTP)
Email: Simple Mail Transfer Protocol (SMTP)
Web Browsing: Herpertext Transfer Protocol (HTTP)

A

Application Layer

50
Q

Data Encryption/Decryption
Data Compression
-lossing
-lossless

A

Presentation Layer

51
Q

Authentication
-username
-password

Authorization

A

Session Layer

52
Q

Transmission Control Protocol (TCP)
*connection oriented services
-request
-acknowledge
-send data

User Datagram Protocol
*connection services
-send data
-send data
-send data

A

Transport Layer

53
Q

routing, networking, logical / IP addressing

A

Network Layer

54
Q

-error-free data transfer

A

Data Link Layer

55
Q

-composed of 6-two digit hexadecimal number

A

Media Access Control (Mac)

56
Q

responsible for physical connections

A

Physical layer

57
Q

A
P
S
T
N
D
P

A

Application Layer
Presentation Layer
Session Layer
Transport Layer
Network Layer
Physical Layer

BSCPE3-01 (6 decks)

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