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Flashcards in Transistion Modes Deck (14)
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1

Serial
transmission

Data is sent one bit at a time along the same data line

2

Parallel
transmission

A number of bits sent simultaneously over multiple data lines

3

Simplex

Data Transmission is possible in one direction only.

4

Half duplex

Data Transmission is possible in both directions but only in one direction at the
same time.

5

Duplex

Data Transmission is possible in both directions simultaneously

6

Multiplexing

signals (digital or analogue) are combined into one signal and sent over a shared medium.

7

Switching

Examining packets and routing them to a specific destination.

8

Routing

Routing is the process of moving packets across a network from one router/node to a another. Routers hold information about the addresses of devices in the network or other networks in a routing table.

9

FDM

(Frequency-division multiplexing)
The available channel bandwidth is split into narrower bands each one is used for a separate transmission.

10

TDM

(Time-division multiplexing)
The available channel bandwidth is split into short time intervals each one is used for a separate transmission.

11

CSMA/CD

(Carrier Sense Multiple Access/ Collision Detection). A protocol for managing data traffic on a network.
It detects collisions and deals with collisions by resending packets after a random time.

12

Circuit switching

Path is set up from sender to receiver for the duration of the transmission and kept open until transmission complete. All data follows same path , in order. Path not used by any other data.

13

Packet switching

Data split into packets. Each packet takes its own route from sender to receiver occupying the channel for only a short time. Packets may need to be reordered.
Better security ( harder to intercept) , More efficient use of data lines ( no waiting during gaps), less likely to bee affected by network failure

14

Handshaking

Exchange of signals between devices to establish their readiness to communicate