CS 160 Unit 3/4

Router

(computer science) a device that forwards data packets between computer networks

circuit

A computer uses millions of tiny electronics components that come together as a circuit.

Internet

A global network connecting millions of computers, making it possible to exchange information.

open network

A network that uses standard protocols (TCP/IP)

Data Center Network (DNC)

A network used in data centers where data must be exchanged with very little delay.

IP address

A number that uniquely identifies each computer or device connected to the Internet.

IP

A protocol that identifies devices using IP addresses and provides a routing strategy to send data to a destination IP address.

TLS (Transport Layer Security)

A secure protocol for sending encrypted data so that attackers can't view private info. (A security protocol that uses certificates and public key cryptography for mutual authentication and data encryption over a TCP/IP connection.)

Cat5 cable

A type of twisted pair cable that's designed for use in computer networks.

computing device

An electronic device that operates under the control of instructions stored in its own memory that can accept data, process the data according to specified rules, produce results, and store the results for future use.

Protocols

Define how each device must communicate w/ each other. (The internet is powered by many layers of the protocols.)

IP protocols

Describes the use of IP addresses to identify internet- connected devices.

single point of failure

Is a component in the system that will bring down the entire system if it fails.

adder

Is a device that will add together two bits and give the result as the output.

redundancy

Means having extra or duplicate resources available to support the main system.

network topology

Network topology refers to the manner in which the links and nodes of a network are arranged to relate to each other.

Wires & Wireless

Physical connections between devices, plus protocols for converting electromagnetic signals into binary data.

TCP and UDP

Protocols that can transport packets of data from one device to another + check for errors along the way.

User Datagram Protocol (UDP)

Provides a lightweight service for connectionless data transfer without error detection and correction

Fault- tolerant

System is one that can experience failure (or multiple failures) in its components, but still continue operation properly.

forwarding table

Table that maps destination address to a routers outbound links

destination IP address

Tells the router where the packet wants to end up.

HTTP and DNS

The protocols powering the world wide web, what the browser uses every time you load a webpage.

Local Area Network (LAN)

a computer network that covers a small area

Ethernet

a system for connecting a number of computer systems to form a local area network, with protocols to control the passing of information and to avoid simultaneous transmission by two or more systems.

Computer Network

a system that connects computers and other devices via communications media so that data and information can be transmitted among them

Wide Area Network (WAN)

connects computers across a wider geographical area

Logic gates

devices that produce a single binary output based on one or more binary inputs

Transmission Control Protocol (TCP)

is the data transport protocol that's most commonly used on top of IP.

hierarchy

ranking