| A | B |
|---|
| ISOC | Internet Society- Provides leadershipin addressing issues that confront the future of the Internet |
| IANA | Internet Assigned Numbers Authority- Controls who gets public IP addressess |
| IEEE | Institute of Electrical and Electronics Engineers |
| ISP | Internet Service Provider |
| POP | Point of Presence- Place where we connect to the internet |
| Dial-Up | Access internet using analog phone lines- SLOW |
| DSL | Digital Subscriber Line- Access internet using digital phone lines |
| Leased Line | Access internet using a dedicated digital line, used buy businesses |
| Satellite | Access internet using satelite dish |
| SLA | Service Level Agreement- Written guarantee of service |
| Symmetric | Internet download and upload speed are equal |
| Asymmetric | Internet download speeds are faster than upload speeds |
| TCP/IP | Transmission Control Protocol/ Internet Protocol |
| RFC's | Request For Comments- How network standards are decided upon |
| 64-1500 Bytes | Minimum and maximum packet size |
| Datagram | Internet packet |
| Header | contains destination and source information for IP Packet |
| NOC | Network Operations Center |
| tracert | tool to determine path that a packet uses as it travels the internet |
| ping | tests end to end connectivity using ICMP packets |
| cloud | Used to represent then internet in network diagrams |
| DSLAM | DSL Access Multiplexer- Used in NOC for DSL lines |
| CMTS | Cable Modem Termination System- Used in NOC for cable modems |
| router | Used to move packets around the internet |
| Twisted Pair | most common ethernet media |
| Coaxial | Used for internet from cable modem to CMTS, good for broadband |
| Fiber Optic | Best ethernet media for distance and resistance to EMF and RFI |
| EMF | Electro Magnetic Interference |
| RFI | Radio Frequency Interference |
| crosstalk | electrical interference where the signal from one cable 'leaks' to second |
| UTP | Unshielded Twisted Pair etheret cable |
| STP | Shielded Twisted Pair |
| ScTP | Screened Shielded Twisted Pair |
| Category 3 | UTP Cable used for voice |
| Category 5 and 5E | UTP Used for data, supports 100-1000Mbps |
| Category 6 | UTP Cable used for data, supports 1000Mbps-10Gbps |
| Category 7 | Sctp Cable for data, supports 1000Mbps-10Gbps |
| Coax Cable | Carries broadband data better than UTP but harder to install |
| Fiber Optic Cable | Glass or plastic cable used to carry data using flashes of light |
| Cladding | Used in fiber optic cable to reflect light back into the core of the cable |
| Strengthening material | Used in fiber cable to keep it strong when pulled, often same material as bullet proof vests |
| Single mode fiber | Small core fiber, less dispersion, used for distances of several thousand meters |
| Multimode fiber | Larger core fiber, multiple paths of light, uses LED for light source |
| POE | Power over ethernet, IEEE 802.3af-2003 standard |
| TIA/EIA Organization | Defines the T568A and T568B wire scheme |
| Straight though cables | Used between 'Unlike' devices |
| Crossover cable | Used between 'Like' devices |
| Pins 1 and 2 | Used for transmit on computer wiring |
| Pins 3 and 6 | Used for receive on computer wiring |
| Patch Panel | Makes it easier to rearrange cables in switch closet |
| Punchdown tool | Used to attach wires to wall jack or patch panel |
| Attenuation | Loss of signal over a long distance |
| Crosstalk | Leaking of signal between pairs of wires in an ethernet cable |
