info systems chapter 7
modems
A device that connects you to the internet by converting data into a format that your devices can use. Converts digital signals into analog signals, front door to the internet
router
A device that provides Wi-Fi and is typically connected to a modem, keeps your netflix from buffering
switch
Connects devices in a network to each other, enabling them to talk by exchanging data packets, traffic directors
The domain name system (DNS)
Converts IP addresses to domain names, the internets phone book
network interface of TCP/IP
Defines networking methods for local network communication, including the protocols used to describe the local network topology
Internet layer of TCP/IP
Exchanges datagrams across network boundaries, providing a uniform networking interface
MAC address
First half tells you the manufacturer and the second half is a unique identifier assigned by the manufacturer (36-13-E8-3A-82-E4)
transport layer of TCP/IP
Responsible for host-to-host communication, providing a channel for applications to communicate
LAN
Local Area Network
computer, network operating system, wiring, NIC, switchers, router
What are the 6 parts of computer networks
application, transport, internet, network access
What are the four layers of the TCP/IP Reference Model
application layer of TCP/IP
Where applications create user data and communicate with other applications
WAN
Wide Area Network
NIC or Network interface card
a hardware component, typically a circuit board or chip, installed on a computer so it can connect to a network, VIP card into the internet
analog communication
an old-fashioned way of sending information over a network, where the signal is continuously variable, meaning it can be any value within a range, old-style radio broadcasts and basic television signals with an antenna
wireless connection
based on radio signals, long-distance, wireless communication and internet access (600+ Mbps)
TCP/IP reference model
four layer model that allows computers on the same network to identify and communicate with each other
fiber optic cable
generated by lasers for high-speed transmission of large quantities of data, 15 Mbps to 6+ Tbps
coaxial cable
high speed data transmission, used for cable TV and longer runs than 100 meters (1 Gbps)
twisted pair wire (ethernet cable)
most common 10Mbps LAN cable, max run of 100 meters (10-100+ Mbps)
digital communication
multiple devices, like your phone, computer, or tablet, can talk to each other by sending information in a digital format
Packet Switching
Method of slicing digital messages into parcels (packets), sending packets along different communication paths as they become available, and the reassembling packets at destination
IP address
Tells you the geographic location of a device connected to the internet and the service provider they are using (207.45.250.118)
