Chapter 6 - Telecomm and Networking Flashcards
Define a Computer Network
A system connecting computers and other devices through communication media so that data and information can be transferred
What is bandwidth?
The transmission capacity of a network (bits per second)
What is PAN and what does it stand for?
Personal Area Network
A computer network used for communication among computer devices close to one person (printers, scanners, etc)
What is LAN and what does it stand for?
Local Area Network
A computer network covering a small physical area (a home, an office, etc)
What is CAN and what does it stand for?
Campus Area Network
A computer network made up of an interconnection of LANs within a limited geographical area
What is MAN and what does it stand for?
Metropolitan Area Network
A network that connect two or more LANs or CANs but does not extend beyond the boundaries of the immediate town
What is WAN and what does it stand for?
Wide Area Network
A computer network that covers a broad area
What is an enterprise network?
An organizations network which is composed of interconnected multiple LANs and WANs
What are backbone networks?
High speed central networks to which smaller networks connect
What are digital signals?
Discrete pulses that are either on or off representing a series of bits (1s and 0s)
What are the 3 basic functions of TCP?
- Manage the movement of data packets between computers
- Sequences the transfer of packets
- Acknowledges the packets that have been transmitted
What is the transmission technology that breaks up blocks of text into packets?
Packet switching
Describe the following and provide an example:
Application Layer
Transport Layer
Internet Layer
Network Interface Layer
Application Layer: Enables the program to access the other layers (ex. HTTP)
Transport Layer: Provides communication and packet services (ex. TCP)
Internet Layer: Addresses, routes and packages data packets (ex. IP)
Network Interface Layer: Places packet on and receives them from the network medium (ex. N/A)
What is distributed processing?
Dividing processing work between or among two or more computers on the same network
What is the difference between fat clients and thin clients?
Fat clients: Large storage and processing power, allowing them to run local programs if the network goes down
Thin clients: May have no local storage and limited processing power
What is the world wide web?
A system of universally accepted standards for storing, retrieving, formatting, and displaying information through client/server architecture
What is telecommuting?
A work arrangement where an employee works at home or another out-of-office location
What is crowdsourcing?
A process in which an organization outsources a task to an undefined, generally large group of people in the form of an open call
What are the 3 elements of crowdsourcing? Define them
Outsourcing: Sourcing business needs from outside entities to achieve goals
Crowd: An undefined, non-professional group of people online
Social Webs: Web based technologies used to find the potential crowd
What is Circuit Switching?
A communication method where a dedicated connection is established between two devices (ex. a phone call)
What is the difference between IPv4 and IPv6?
IPv4 is older and uses a 32-bit address format, which limits the amount of unique addresses it can have
IPv6 is newer and uses a 128-bit address format, which allows for nearly unlimited unique addresses
What is the default port for HTTP and HTTPS?
HTTP: 80
HTTPS: 443
What is a DNS?
Domain Name System: Allows users to access websites using human-readable domain names instead of IP addresses
