Ch 7.1 - Networking Concepts: Principles of Networking Flashcards
Networks, Host/ Intermediary Devices, Media, Bandwidth/ Latency, Data Transmission, Types of Networks
Network
A system formed by links
Host
Any device that sends or receives information on the network
host devices
“Tablets, laptop, desktop computer, IP phone, scanner
Reminder: Host devices must be directly connected to the network, anything connected to another device is a peripheral. IP phones directly connected to network.”
Intermediary Devices
Devices that exist between host devices, ensuring data flows from 1 host device to another host device
Switch
An intermediary device that is used to connect multiple devices to a network
Wireless Router
An intermediary device that connects multiple wireless devices to a network
“Access Point (AP)”
An intermediary device that provides wireless connectivity, but has fewer features than a wirless router.
Network Media/ Medium
Provides the channel over which the message travels from source to destination.
The plural of MEDIA is…
The singular of MEDIUM is….
Name 3 common media that is used to link network devices together
“1. Copper cabling
- Fiber-optic cabling
- Wireless connection”
Copper cabling
This type of media uses electrical signals to tansmit data between devices
Fiber-Optic Cabling
This type of media uses glass or plastic fiber to carry information as light pulses
Wireless Connection
This type of media uses radio signals, infrared technology, or satellite transmissions.
Bandwidth
“A measurement of data that can be transmitted within a fixed amount of time. ‘—’ is measured in # of bits that can be transmitted every second; packets are sent across network 1 bit at a time. “
How is the measurement of bandwidth presented?
”( )bp/s -k , -M, -G, … is a measurement of?”
Latency
The amount of time it takes data to travel from source to destination
Bandwidth unaccounted for, how is latency created?
“Data is delayed by network devices & cable length. Network devices add latency when processing & forwarding data.”
Name 3 capabilities of data transmission flow
“1. Simplex 2. Half-Duplex 3. Full-Duplex”
Simplex Transmission
This capability of data transmission can only flow in one direction between a sending station and a receiving station.
An example of a ‘simplex’ transmission
“What type of transmission is the example below? A signal being sent from a TV station to a home TV”
Half-Duplex Transmission
“This capability of data transmission can flow in both directions, but NOT simultaneously. If both parties transmit at the same time, neither one can be heard.”
An example of a ‘half-duplex’ transmission
“What type of transmission is the example below? Communication on a two-way radio.”
Full-Duplex Transmission
Data transmission that can go both ways, simultaneously.
An example of ‘full-duplex’ transmission
“What type of transmission are the examples below? -An Internet connection using DSL service. -A telephone conversation.”
Broadband technology
Multiple signals using multiple frequencies over one cable.
What type of transmission does broadband technology operate in?
A technology that is an example of full-duplex transmission?
What 2 Internet connections work on Broadband technology?
Cable internet connection & digital subscriber line (DSL) work on ‘—’ technology.
What other capabilities does a multipurpose device (aka wireless router) have?
Switch, AP, firewall
