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The unique code (name) that identifies every modem and therefore every machine ever made.
What is the Media Access Control (MAC) Number
A synonym for "transmission medium", the collective term for transmitting data by radio waves or cabling.
What is a carrier?
An exclusive allocation of a wire between 2 endpoints (communicators).
What is a circuit or circuit switching
The network of machines within a company building, room, but perhaps even a campus.
What is a Local Area Network (LAN)
Term given when 2+ PCs on a shared network cable simultaneously transmit.
What is collision
It had the infrastructure, technical expertise and land to implement the first intercity wired networks
What did the railroads pioneer
A program that sits on a local router that, if asked, will assign a temporary IP address to a computer registering in a domain
What is DHCP or Domain Host Configuration Protocol
The rate at which a carrier can transmit or carry data
What is bandwidth
Where a message (or wire) crosses a network node in order to reach a destination
What is a hop (or jump)
The most popular networking strategy where all machines on a cable hear all messages from one another
What is ethernet
Waiting for a silent moment on an ethernet cable before be-trying to broadcast
What is backoff
While only milliseconds now, messages could once take at least 3 weeks to travel such distance
How long did the early transmitted messages to travel from London to San Francisco
4 8-bit number separated by dots (e.g. 172.217.7.238), once thought sufficient to identify every computer on planet Earth.
What is IPv4
To reduce the chances of having collisions, these devices are used to make smaller "collision domains"
Why do LANs use Switches?
A piece of a larger message that makes it easier and quicker to transmit.
What is a packet
One time nickname given to physically transporting tapes and cards about a building
What is sneakernet
The name for the group of PCs using a single ethernet cable; derived from what could go wrong
What is a collision domain
To save money by sharing cost resources like printers and disk drives
Why implement local area networks (LANs)
A technique to catch messages that cannot reach their destination or might be caught in an endless transmission loop.
What is the "hop count"
A central point connecting multiple machines and a focal point for communications.
What is a Hub?
As opposed to a dedicated circuit, this approach transmits over a shared cable, hopping pieces of a message between nodes
What is message (packet) switching
A networking strategy where 1 machine momentarily possessed the right to broadcast a message
What is (was) token ring
A strategy to resume communicating after a collision where each PC doubles how long it waits before re-trying
What is exponential backoff
From as little as 2 machines to an entire campus
How big can a local area network (LAN) be
172.217.7.238, 8.8.4.4, or 8.8.8.8
What is an example of a Google IP Address
A machine that connects a LAN to the outside world and knows where to send outbound traffic
What is a router
The core protocol by which computers communicate; name of the cable connecting a PC to a router or switch.
What is Transport Control Protocol over IP (TCP/IP)
An internal network for a company that sits atop the internet
What is an intranet
"Thank you for letting me know, we charge extra for ice coffee," when the customer complained his cup of coffee was cold.
What was the waiter's reply
This term describes how messages can still be sent onward even if a particular node path fails
What is fault tolerance