Cardinalis means "that upon which a door hinges, pivotal" in Latin, from cardo, "hinge, pivot". From this it acquired its secondary meaning, "important, principal", which it still has in English (e.g. a cardinal sin). Its third meaning is derived from this: a cardinal number is a "principal" number, i.e. one that simply says how many objects there are.
That'll be one pound.
Two billion people might die.
Ordinalis means "in order of succession, of an order". It comes from ordo, "order, rank". An ordinal number is an adjective that denotes what place an object has in a certain order. The names of the ordinal numbers are usually derived from the cardinal numbers by adding -th.
That is my second victory.
This is the tenth time she's dumped me.
While a cardinal number refers to several objects ("three apples"), an ordinal number refers to only one of those ("the third apple"). An ordinal number is hence dependent on the notion of a cardinal number: there can't be a third apple unless there are at least three apples. By contrast, there can be three apples without one being the third, if they are just not arranged in any particular order.
The Romans used these terms the same way. They also had distributive numbers, which indicated "every third apple", or apples "in triads", "three each".
"Casting a vote" is now a "figure of speech" for voting.
In the old days, one would vote by filling out a paper ballet, and "casting it" into a voting receptacle.
But nowadays, votes are recorded electronically.
Best Answer
From MacMillan:
FTP is a protocol for transferring files from one computer to another.
The transport layer is the vehicle for moving data. As this site explains, "the transport layer relieves the upper layers from any concern with providing reliable and cost effective data transfer." In other words, the other layers don't have to know how the truck (transport layer) works; they just have to know the truck is there.
TCP allows two hosts to transmit packets; conceptually, the packets pass through the medium of TCP without loss, and without being reordered.