Topic #2: Communicating Over Networks Flashcards
Elements that make up a network
Devices
Medium
Messages
Rules
a common computer used at home
Desktop Computer
a portable computer
Laptop
a computer dedicated to serving end users on a computer network
Server
a digital telephone that carries voice as data over data networks instead of analog phone lines
IP Phone
Local-Area network media, usually copper cable
LAN media
Depicts local-area network wireless access
Wireless Media
The most common device for interconnecting local-area networks
LAN Switch
A device that provides security to networks
Firewall
A device that helps direct messages between networks
Router
A specific type of router often found in home networks
Wireless Router
A symbol used to summarize a group of networking devices out of local management control, often the Internet itself
Cloud
One form of wide-area network interconnection, represented by the lightning bolt-shaped line
WAN media
3 Mediums for Networks
Copper Cables
Optical Fiber Cables
Wireless Fidelity
Meaning of Wifi
Wireless Fidelity
Signals carried by a copper cable
Electric Signals
Signals carried by an Optical Fiber Cable
Light Signals
Signals carried by Wi-Fi
Microwaves
Software programs that support communication functions
Services
How does one initiate a message
Install a service
It is a generic term that encompasses web pages, e-mail, instant messages, telephone calls, and other forms of communication
Messages
Protocol for the WWW
HTTP (Hypertext Transfer Protocol)
Protocol for Email
SMTP (Simple Mail Transfer Protocol)
POP (Post Office Protocol)
Protocols for Instant Messaging
XMPP (eXtensible Messaging and Presence Protocol)
OSCAR (Open System for Communication in Real Time)
