BTMA 317, Chapter 6, Telecommunications and Networking
Types of broadband connections
-digital subscriber line (DSL) -cable to your homes/dorms
TCP 3 basic functions
1) it manages the movement of data packets between computers by establishing a connection between the computers 2) it sequences the transfer of packets 3)it acknowledges the packets that have been transmitted
Types of Computer Networks Ranked from smallest to world-wide
1. Personal Area Networks (PAN), 2. Local Area Networks (LAN) 3. Metropolitan Area Networks (MAN) 4. Wide-Area Networks (WAN) 5. The Internet (The Ultimate wide-area network)
WANs also contains routers...
A communications processor that routes messages from a LAN to the Internet, across several connected LANs, or across a WAN (the Internet)
Transmission Control Protocol/Internet Protocol (TCP/IP)
A file transfer protocol that can send large files of information across sometimes unreliable networks with assurance that the data will arrive uncorrupted.
Local Area Network (LAN)
A network that connects communications devices in a limited geographic region, such as a building, so that every user device on the network can communicate with every other device.
Wide area network (WAN)
A network, generally provided by common carriers, that covers a wide geographical area.
Internet Protocol (IP)
A set of rules responsible for disassembling, delivering, and reassembling packets over the Internet.
Q. A _________ network is a high-speed central network to which multiple smaller networks connect?
Backbone
Enterprise Network
Connection of multiple LANs and possibly multiple WANs of an organization into a network
Software defined network (SDN)
Emerging technology that is becoming increasingly important to help organization manage their data across their enterprise networks. Since SDN are the decisions that control how network traffic flows across netwrok devices and are managed centrally by software.
2 major protocols
Ethernet Transmission control protocol/ Internet protocol
Most LANs use Ethernet
Ethernet: A common local area network protocol. -Ethernet LAN that consists of 4 computers, a server, and a printer, all of which connect via a shared cable
Q. LANs typically contain multiple WANs.
False
Backbone Network
High-speed central networks to which multiple smaller networks (such as LANs and smaller WANs) connect
Embedded LANs
LANs connected to a backbone network
Types of Bandwidth: Broadband vs Narrowband
Narrowband = low transmission capacity (56K, or dial-up internet) Broadband = high network capacity (faster than 25 megabits per second (Mbps) for download and 4 Mbps for upload )
Computer Network
System connecting computers and other devices via a communications media so that data and information can be transmitted among them.
Protocol
The set of rules and procedures governing transmission across a network.
Bandwidth
Transmission capacity of a network in bits per second
Many LANs have a File Server/Network Server
a computer that contains various software and data files for a local area network and contains the network operating system
Digital signals
a discrete pulse, either on or off, that conveys information in a binary form