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Flashcards in Misc Deck (20):
0

Three elements of communication:

Sender, receiver, channel (medium or pathway)

1

Segmentation

Data divided into smaller parts during transmission

2

Benefits of segmentation

Increase reliability of network communications

Multiplexing: interleaving pieces of separate conversations together on the network

3

Components of a network

Devices, media, services and processes

4

End device is...

Sender or receiver
Aka hosts
Ex. Pc, server, VoIP, mobile devices, security cameras

Distinguished by ip addresses

5

Intermediary devices

Ex: router, switch, firewall, hub

Directs data path

6

Network media

Is communication carried across a medium

7

Criterion for choosing network medium

Distance the medium can carry a signal

Environment in which it is installed

Cost and installation of media

8

LAN

Spans single geographical area; ex: single business, campus, region

9

Wan

Via a telecommunications service provider network; connect LAN in geographically separate locations.

10

Intranet

A private connection of LAN and WANs that belong to an organization; only accessible by members, employees, others with authorization

11

NIC

Provides physical connection to the network

12

Interface

Specialized ports on an internet working device that connects to individual networks.

13

Protocol suite

A group of interrelated protocols that are necessary to perform a communication function; technology ondependent

14

Osi model

Primary reference model for network communications

15

Network access layer

Consists of data link and physical layers of osi model

16

Protocol data units

Data is application
Segment is transport layer
Packet is network layer
Frame is data link
Bits or signals is physical

17

Data encapsulation process

Build data, segment data, put segments into packets, encapsulate into frames, convert into signals

Then, reverse process towards destination

18

Addressing in the network

Upper layers: encoded app data
Transport layer: port numbers (specific process)
Network layer: IP address (routers, different networks.)
Data link: MAC address
Physical: signals, header of layer 2

19

Protocols must:

Match on source and destination hosts