| A | B |
|---|
| star | topology with a hub |
| ring | tokens |
| bus | ehternet |
| sender | part of communication |
| message | part of communication |
| receiver | part of communication |
| Data Terminal Equipment | process data |
| Data Communication Equipment | receive & transmit data |
| Simplex | one way communication |
| Half-Duplex | two-way, one-way at a time |
| Duplex | two-way simultaneously |
| Access Crontrol | methods of sending information |
| equal nodes | peer-to-peer |
| server | data storage & LAN control |
| topology | physical architecture |
| SOP | documentation |
| protocols | data communication rules |
| OSI | basic protocol blueprint |
| LAN | geographically concentrated network |
| WAN | geographically large network |
| TCP/IP | most common WAN protocol |
| PPP | PC-to-Internet connection |
| baseband | a 10MHz network |
| broadband | a 100MHz network |
| HUB | common LAN topology |
| fiber optic | glass strand |
| copper wire | twisted pair |
| microwaves | satellite network medium |
| trunk line | 1000's of calls |
| star network | directed by hub |
| bus network | contention based |
| NIC | node port connectors |
| NIC | address & identity |
| CISC | Intel processor design |
| RISC | more efficient processor design |
| SCSI | 'scuzzy' interface |
| repeater | extends the LAN |
| gateway | makes incompatable protocols avaialble |
| multiplexer | electrionic switch |
| BPS | bits of data being sent |
| BAUD | data symbols transmitted per second |
| FM | 88Mhz to 108MHz |
| deviation | amount of frequency chnage |
| Carson's Rule | sidebands contain 96% of radiated power |
| PM | a form of FM |
| Baudot | teletypewriter code |
| terminal codes | special control functions |
| CRC | error detection codes |
| logic 1 | steady state |
| error detection bit | parity item |
| synchronous | one character follows the other |
| sync | tells the reciever time pulse for bit |
| Physical layer | actual data transfer through medium |
| EIA/TIA-232 | common interface for PC's |
| EIA/TIA-449 | improved EIA/TIA-232 |
| EIA/TIA-485 | high performance standard |
| 20mA | current loop logic 1 |
| MDL | distribution record of SOP's |
