Internet Flashcards
Internet
Computers that share the same network ID
Local Area Network
LAN
Internet
Two or more LANs interconnected by one or more routers.
Wide Area Network
WAN
Internet
A WAN that spans a city
Metropolitan Area Network
MAN
Internet
Point-to-point connection used only in Bluetooth connections
Personal Area Network
PAN
Internet
Composed of many organizations that connect to eachother
The Internet
Internet
These are providers that do not pay anyone and have peering agreements
No Cry
Tier 1
Internet
These providers pay some Tier 1s but also peer with Tier 1s and Tier
2 x cry
Tier 2
Internet
Pay Tier 1 or Tier 2 providers
I cry
Tier 3
Internet
Goes by the name plain old telephone service (POTS)
Dial up
Internet
Dial-up plug connectors to phone system
RaJ-DaD
RJ-11
Internet
Convert analog POTS to digital COM port connections
Modems
Internet
Modems connect to other modems using
Phone Numbers
Internet
High speed, always on connections
Broadband
Internet
Runs on top of telephone service
Digital Subscriber Line (DSL)
Internet
Data Over Cable Service Interface Specification (DOCSIS) uses
Cable connections
Internet
Provide service to remote locations
Satellites
Internet
Many metro areas provide native
Ethernet for an ISP
Internet
Client and server are required for
All internet connections
Internet
Primary function of a firewall is to
block ports
Internet
Client and server networks use
Firewalls
Internet
Firewalls block ports on incoming
Vs outgoing
Internet
Must not block incoming ports on the ports to which they listen
Servers
Internet
Used to transfer files from one system to another
File Transfer Protocol (FTP)
Internet
You need an FTP client and all
Web browsers are also FTP clients
Internet
FTP uses TCP port 21
21-P
Passive Mode
Internet
FTP uses TCP port 21 in
Active mode
Internet
For FTP Active Mode to allow port 20 incoming
Port Triggering
Internet
Email uses this to send e-mail from a client to an e-mail server
Simple Mail Transfer Protocol (SMTP)
Internet
To pull down e-mail message from e-mail server
Post Office Protocol V3 (POP3)
Internet
To pull down e-mail message from e-mail server
Internet Message Access Protocol (IMAP)
Internet
SMTP uses TCP Port
NaiL
25
Internet
POP uses TCP port
DaDS
110
Internet
IMAP uses port
imap DReaM
143
Internet
Requires knowledge of IP addresses or DNS name for different servers
To set up an e-mail account.
Internet
Servers as a go between - between a client and a server
Proxy Server
Internet
Application Specific
Proxy Servers
ie
Web Proxy for HTTP / HTTPS
Internet
Proxy servers provide
firewalling
Internet
Proxy servers provide
Check for malware
Internet
Proxy servers provide
Ban bad URLs
Internet
in order for an application to use a proxy server
The address of the proxy server must be known
Internet
Use the Internet to create a private connection to a remote network
Virtual Private Networks (VPNs)
Internet
To connect to a VPN server at the remote network a
VPN client program is needed
Internet
In order for the VPN client to connect to the VPN server
The VPN client needs to know the IP address of the VPN server
Internet
Giving internet capability to devices not traditionally associated with the Internet such as
Lightbulbs, toasters
Internet of Things (IoT)
Internet
Common IoT connection
802.11
Internet
Common IoT connection
Zigbee
Internet
Common IoT connection
Z-Wave
Internet
IoT requirement to link to IoT
IoT hub
Internet
Add voice capabilities to IoT
Amazon Alexa
Internet
Add voice capabilities to IoT
Apple Siri
Internet
Add voice capabilities to IoT
Google Home
Internet - Quiz
Dial-Up connection speeds max out at
LeaCH
56Kbps
Internet - Quiz
Broadband DSL may require
PPoE authentication
Internet - Quiz
DOCSIS standard is used by
Cable broadband
Internet - Quiz
The client (system running the browser) must allow outbound traffic on port
PeZ
80
Internet - Quiz
Inbound port 80 on a web client should be
blocked
