Network
In the network layer, what form is the data in?
Binary
Unlike primitive beliefs, the internet is a dynamic system consisting of various servers that have advanced global user connectivity to unprecedented levels. Thus, what do you presume the definition of a “thin” client to be? Justify your answer with specific evidence from the text, the history of the internet, as well as any prior knowledge you may have on the subject.
Answer: A thin client is not smart, and does not know how to do anything.
What is a protocol?
A set of rules that facilitate communication between entities.
What Encryption uses a shifted alphabet?
Caesar Cypher. Also Vigenere. In fact almost every cipher is based on shifting the alphabet rather than random encryption coding.
What is an internet protocol for sending emails?
SMTP or XMPP
What is Moore’s law?
Each year, computers get twice as fast, and half as large
Which transport protocol sends emails?
TCP
What is the key used for in Vigenere?
A keyword is used where the shift for each letter in the plaintext is from the corresponding letter in the keyword.
What are three ways bits of data can be physically transferred?
Radio, Electricity, Light
Who invented the World Wide Web? Are the World Wide Web and the internet the same thing?
Robert Cailliau and Tim Berners-Lee. No - why?
What is the difference between UDP and TCP?
Both send packets of data to from a host to a client, but UDP is real-time and non-dependent on any order, checklist, or timing. If data is missing or jumbled, it simpy continues to give live-time data. TCP sends packets concurrently, chronologically, and without any mistakes. If there are mistakes or missing data, the entire message will not be sent. It must arrive to the host in perfect condition and order.
What is the purpose of the network layer?
Transmit and deliver binary information over wire, fiber optic, or wireless.
What is the IETF?
The Internet Engineering Task Force is an open standards organization, which develops and promotes voluntary Internet standards,
What are the 4 types of application protocols?
HTTP, SMTP, FTP, VOIP
What is a packet?
Self-contained collection of data plus a header that describes what the data is, where it is going, and where it came from
How do companies establish connections between different continents?
They drop wires in the ocean or connect via satellite.
What are the layered protocols of the internet?
Physical network, IP, Transport, Application