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