| A | B |
|---|
| Datagram | logical group of information sent as a network layer unit |
| Encapsulation | the wrapping of data in a particular protocol header |
| Frame | logical grouping of information sent as a data link layer unit |
| Physical | Layer 1 - the link between end systems |
| Data Link | Layer 2 - deals with physical addressing, network topology, and flow control |
| Network | Layer 3 - where routing occurs, provides connectivity between two end systems |
| Transport | Layer 4 - responsible for reliable network communication, provides transport fault detection and recovery, and information flow control |
| Session | Layer 5 - establishes, manages and terminates sessions between applications, manages data exchange between presentation layer entities. |
| Presentation | Layer 6 - ensures that information sent by application of one system is readable by application layer of another, concerned with data structure. |
| Application | Layer 7 - provides a service to application processes, e-mail,file transfer etc; |
| Packet | Logical grouping of information that includes a header containing control infromation and user data, network layer units of data. |
| Segment | Section of a network that is bound by bridges, router, and switches, also a single transport layer unit of information |
| TCP/IP | Common name for the suite of protocols developed by the U.S DOD, supports the construction of worldwide internetworks. |
| NIC | Network Interface Card |
| Router | Layer 3 device, connects LANs to WANs that are separated by distances |
| Switch | Layer 2 device that determines whether data remains on LAN or not. |
| Repeater | Layer 1 device that regenerates signals, allows them to travel a longer distance on the media |
| Ring Topology | connects one host to the next and the last to the first. |
| Star Topology | connects all hosts to a central point of concentration |
| Hierarchical | Instead of using hubs/switches, the system is linked to a computer that controls the traffic on the topology |
| Mesh | each host has its ow connections to all other hosts, provides as much protection as possible from interruption of service. |
| Broadcast | each host sends its data to all other hosts on the network medium, first come first serve. |
| Protocol | a formal set of rules that govern how devices on a network communicate. |
| LAN | allows businesses to locally share files and printers efficiently |
| WAN | makes it possible for businesses to communicate across greater distances. |
| MAN | network that spans a city or suburban area, consisting of two or more LANs |
| SAN | used to move data between servers and storage resources, avoids any traffic conflict between client and servers |
| VPN | network that is constructed within a public network infrastructure such as the Internet. |
| Bandwidth | the amount of data/information that can flow through a network connection in a given amount of time. |
| BPS | basic unit of Bandwidth |
| Throughput | actual measured bandwidth transmitted on the network |
| Hertz | basic unit of analogue of bandwidth |
