1	computer network		_____	Main purpose is to resource share. Ex: LAN, Man, and WAN.
2	LAN		_____	Network of many LANS
3	MAN		_____	Reference model is derived from OSI and provides a set of protocols that are used across multiple diverse networks. 4 layers.
4	WAN		_____	Supports application and end-user, communication partners and QOS identified. FTP, email, applications, including cisco packet tracer.
5	Topologies		_____	LAN, passive device, no collision, non-blocking, uses mac address.
6	Signal Transmission Media		_____	Reference model that describes the hierarchy of various protocols that are using in networks. Seven Layers.
7	Network Interface Card		_____	Transmission time, then time to propagate from point A to B, then time to fully receive the packet.
8	Switch		_____	Packets encoded and decoded into bits. Two sub-layers.
9	Hub		_____	includes all processes and services that use transport layer to deliver data.
10	Router		_____	Gateway device responsible for establishing connection between various networks, uses IP address.
11	Gateway		_____	Syntax Layer, identifies compatibility problems, align with network format, independence from encryption.
12	Protocols		_____	Few interconnected computers, <100. Found in single buildings.
13	Open System Interconnect		_____	Responsible for accepting and transmitting IP datagram.
14	TCP/IP		_____	Provides transparent transfer of data between end systems. Ensures complete data transfer.
15	Application (Layer 7)		_____	Physical channel of communication between sender and receiver.
16	Presentation (Layer 6)		_____	Defining cable types, electrical impulses and mechanical consideration.
17	Packet Cycle		_____	Network of many MANS
18	Session (Layer 5)		_____	Provides support to TCP or UDP protocol.
19	Transport (Layer 4)		_____	Connects various components in network, broadcasts, repeater.
20	Network (Layer 3)		_____	Scar, Tree, Bus, Ring, Nest
21	Data Link (Layer 2)		_____	provides routing, and switching technologies, addressing (I.P.), functioning.
22	Physical (Layer 1)		_____	Set of standard rules that are followed during various stages of communication.
23	Application Layer 1		_____	Hardware component which all communication signals pass through.
24	Transport Layer 2		_____	Handles machine to machine comm.
25	Internet Layer 3		_____	Establishes, manages, and terminates connections, allocates resources such as bandwidth, time, and duration. Connect on-coordination.
26	Host to network Layer 4		_____	Network point that acts as entrance to another network.