1.3.1 Computing Networks, Connections and Protocols Flashcards
What is bandwidth?
- Data transferred within a defined time period
What is latency?
- Delay when data is sent
What is range?
- Maximum distance data can be sent
What is a routing protocol?
- Rules to find best routes
What is transmission rate?
- Speed data travels
What is a routing cost?
- Determine best route
- For network traffic
What affects network performance?
- Bandwidth
- Latency
- Range
- Number of devices
What is a DNS?
- Domain Name System
- A collection of servers
What is packet switching?
- Files broke down
- Rebuilt at destination
What is an IP address?
- String of numbers
- Locate devices
What is a web browser?
- Software to browse WWW
What is a URL?
- Uniform resource locator
- Website address
What is a centralised network?
- Data at one location
What is a distributed network?
- Data at multiple locations
What is hosting?
- A server connected to client
- Providing a service
If you host a web server, what are you responsible for?
- Security
- Back ups
- Tech support
- Analytics
What is SaaS?
- Software as a service
What does SaaS do?
- Software accessible across devices
- Hosted on remote servers
What are the advantages of SaaS?
- Auto back ups
- Auto updates
- Auto save
- Across devices
What are the disadvantages of SaaS?
- Subscription
- Internet access
- Less data control
What is ethernet?
- Wired network
- Copper cables
What is WiFi?
- Transmission through radiowaves
What is HTTP/S?
- Hypertext transfer protocol / secure
- Identify, request and send web pages
What is FTP?
- File transfer protocol
- Uploading and downloading files
What is POP?
- Post office protocol
- Protocol receives email
- Delivers email to address
- Deletes email
What is IMAP?
- Internet message access protocol
- Protocol receives email
- Delivers email to address
- Saves copy of email
What is SMTP?
- Simple message transfer protocol
- Sends email to email server
What is the TCP model?
- Transmission control protocol
- Application layer
- Transport layer
- Internet layer
- Link layer
What does the application layer do?
- Prepares data to be sent
- HTTP/S
- FTP
- POP
- SMTP
What does the transfer layer do?
- Data into segments
- Port number ( data knows where to go )
- TCP
- UDP
What does the internet layer do?
- Segments into IP packets
- IP address
What does the link layer do?
- Transfer IP packets error free
- Establish connections between client and server
- Ethernet
- Fibre optic
What is data encapsulation?
- Packaging data
What is data decapsulation?
- Unpackaging data
What is the OSI model?
- Seven layer model
- Demonstrates how data is transferred
What is the presentation layer?
- Application layer
- Correct file format
What is the session layer?
- Application layer
- Establishes a connection
What is the physical layer?
- Link
- How data is transmitted
What is a compiler?
- Translates entire code at once
- Stored for later use
What is an interpreter?
- Translates line by line
- Retranslated every execution
What is an assembler?
- Translates assembly language to machine code
What is source code?
- High level programming language
What is object code?
- Machine code
