| A | B |
|---|
| Switch | A device that makes its forwarding decisions based on MAC addresses. |
| RJ-45 | The type of connector used to terminate Cat5 UTP media. |
| Propogation | To travel. |
| Collision Domain. | More of these is good because it results in less congestion. |
| 255.255.255.192 | The subnet mask associated with a class C address in which 2 bits were borrowed from the host portion to create subnets. |
| 255.255.255.0 | The default class C subnet mask (unsubnetted). |
| Datalink Layer | The layer responsible for reliability across a physical link. |
| RIP | The most commonly used routing protocol. |
| IP | The routed protocol used in the Internet. |
| Attenuation | Loss of signal to surroundings. |
| AC (Alternating Current) | The type of current that has a varying time versus voltage graph. |
| Analog | Signal type typical in nature. |
| DC | The type of current found in a battery. |
| 100 meters | The maximum length of UTP cable before it is extended by a repeater. |
| 2000/3000 meters | The maximum length that fiber optic cable can run, unrepeated. |
| MDF | There is one of these per network and is usually placed near the POP. |
| Star | The easiest physical topology to set-up. |
| Hub | Multi-port Repeater. |
| Encoding. | The conversion of binary data into a form that can travel on a physical communications link. |
| 10000001 | 129 in binary. |
| 11111111 | 255 in binary. |
| FF | 11111111 in hexidecimal. |
| A2 | 10100010 in hexidecimal. |
| WAN | A network that connects users across a large geographic area. |
| RJ-45 | Used to terminate Cat5 UTP cable. |
| ARP | Protocol used to find a MAC address for a known IP. |
| ASCII & EBCDIC | File formats for text. |
| Flourescent Lighting | One cause of interference/noise on a cable. |
| Tie Wraps | Used to attach cables to the wall. |
| 65 thousand | The approximate number of hosts on an unsubnetted class B network. |
| 16 million | The approximate number of hosts on an unsubnetted class A network. |
| 254 | The number of usable hosts on an unsubnetted class c network. |
| FTP | Protocol used to upload and download files on the internet. |
| GIF & JPEG | File formats for still images. |
| Physical Layer | Responsible for the electrical and functional specifications. |
| Cable | Networking media. |
| MAC | Layer 2, physical, flat addresses. |
| IP | Layer 3, logical, hierarchical addresses. |
| Router | The device that keeps routing tables and is responsible for path selection. |
| HTTP | Protocol used to download web pages to web browsers. |
| Public | Port numbers below 255. |
| Unregulated | Port number above 1023. |
| Layer 2 Devices (Switches & Bridges) | Build MAC address tables. |
| Single-mode | The type of fiber-optic cable that can run further without being repeated and thus, is best when used between buildings. |
| Inter-building | Between buildings. |
| Intra-building | Withing the same building. |
| Multi-mode | The type of fiber-optic cable that is best implemented within a building. |
| Degradation | The reduction of signal quality. |
| Segmentation | The process of creating collision domains using switches, bridges and |
| Collision Domain | A situation where all computers are located on a single shared access media. |
| 4 | The number of wiring closets needed in a two story building that is 1700 square meters. |
| Hyperlink (link) | An object or word on a web page that, when clicked, transfers you to another web page. |
| Static | Manually implemented. |
| Dynamic | Automatically implemented. |
| Rollover Cable | Used to connect a computer to a router via the console port. |
| Crossover Cable | Used to connect to computers directly to each other. |
| Ohm | Resistance is measured in this unit. |
| Compression & Encryption | Responsibilities of the Presentation layer. |
| 14 | The maximum number of bits that can be borrowed from the host portion of a class B network to create subnets. |
| 6 | The maximum number of bits that can be borrowed from the host portion of a class C network to create subnets. |
