Internet

Question 1

IP Address

Answer 1

Internet Protocol: unique set of numbers that identifies each computer using the internet protocol to communicate over a network

Question 2

DNS

Answer 2

Domain Name System: Applies a name to an ip address that people can read. Translates DNS to IP so computer can read.

Question 3

Router

Answer 3

Forwards data packets between network computers.

Question 4

Packet

Answer 4

information broken up into bites for easier transportation across a network. Each packet contains vital information regarding the sender/receiver, how many other packets complete the information, etc.

Question 5

TCP/IP

Answer 5

Transmission Control Protocol / Internet Protocol

Question 6

TCP

Answer 6

Transmission Control Protocol: Responsible for packetizing data. Header info, sequencing, and error checking

Question 7

IP

Answer 7

Internet Protocol: responsible for transport over internet (origin/destination info)

Question 8

What is a control channel?

Answer 8

a cell tower that is always in contact with your mobile phone: alerts your phone of incoming calls, sets up frequencies for calls, and enable the flow of messages between towers

Question 9

Server-Client Model

Answer 9

Server: Computer that performs tasks (Web, mail, database, backup, etc).
Client: Computer that makes the work requests

Question 10

P2P Network

Answer 10

Peer-to-Peer: Connected directly to another computer, no central server, each machine is server&client

Question 11

P2P vs Server-Client

Answer 11

P2P: All resources shared by all peers, more reliable (server breaks down, whole network is down), no extra system admin as everyone is responsible for own machine.

More probe to malware because no central security, prone to copyright violation because regulations are set/practiced by individual usuers

Question 12

HTTP:

Answer 12

Hypertext Transfer Protocol: transmits data over the internet via world wide web.

Hypertext: Structured text that uses Hyperlinks between nodes.