Vaughn's Summaries

Computer Summaries
Networking

Here is a brief summary tutorial chart of computer network standards, summarizing the differences between LANs and WANs.





Internet protocols, OSI layers, and other computer network technologies are also summarized. This computer networking tutorial includes a brief glossary of computer networking terms.

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ISP - Internet Service Provider
LAN - Local Area Network
MAN - Metropolitan Area Network
WAN - Wide Area Network
Gateway - connects LANs of different protocols
Bridge - connects 2 Ethernet LANs
Router - connects different LANs, speeds
Switch - directs traffic

OSI Layers (Open Systems Interconnect model)
1. Physical - transmits raw data
2. Data Link - checks data, frames, etc.
3. Network - controls subnet, routing
4. Transport - splits data, passes to network
5. Session - manages dialog, synchronizes
6. Presentation - syntax, semantics
7. Application - virtual terminal software

Physical Media
Coax - Coaxial cable
IR - Infra-red
Microwave
STP - Shielded Twisted Pair
UTP - Unshielded Twisted Pair

LAN Standards (distances less than 1000 feet)
Ethernet (10M), Fast Ethernet (100M), Token Ring (16M), FDDI (100M)

WAN Standards (distances greater than 1000 feet)
V.90 (56K), ISDN (128K), DSL (380K), ATM, SONET (155M), ATM (622M), Fiber (1.2G)

Internet Connect Protocols
IP - Internet Protocol
TCP - Transmission Control Protocol
FTP - File Transfer Protocol
DNS - Domain Name Server
HTTP - HyperText Transmission Protocol
SMTP - Simple Mail Transfer Protocol
telnet - guest on large computer
UDP - User Datagram Protocol

Telephone Company Network Protocols
PPP - Point-to-Point Protocol
PPPoE - PPP over Ethernet Protocol
SLIP - Serial Line Interface Protocol

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