Chapter 6

Question 1

What is Communication media?

Answer 1

Transfer of data occurs through this ex. fiber optic cable, wireless, usb.

Question 2

Analog & Digital

Answer 2

Analog: Continuously varying frequency, smooth but inaccurate

Digital: Series of bits, Accurate but choppy

Question 3

What is Protocol?

Answer 3

Procedures used to transfer info between machines

EXAMPLES:
TCP/IP - Internet protocol ex. 142.58.102.68

HTTP - Hyper Text Transfer - send web pages across web

FTP - Send files across network

BitTorrent - Transfer files using P2P file sharing

POP - Helps receive emails, assumes 1 client

IMAP - receive emails, assumes many clients

Question 4

Client/server architecture

Answer 4

A computing model where server hosts, delivers and manages most of resources

Question 5

LAN, WAN, Internet

Answer 5

LAN - 2+ pc’s in small area
WAN - Connects pc’s in different areas
Internet - Network of networks, connects LAN’s and WAN’s

Question 6

Intra/extranet

Answer 6

Intra - Controlled, self-contained grouping of info resources that can be accessed within a single company using web browsers

Extra - Designed to facilitate communications between 2+ business partners

Question 7

DNS

Answer 7

Domain Name System - Database used to translate between domain names and IP.

Question 8

IETF (TCP/IP) Network levels

Answer 8

1. Network access - describes equipment used for comm and protocols used to comm
2. Internet - Works with IP and controls packet organization/timing constraints
3. Transport - Opening connections & maintaining them + ensures correct packets are received
4. Application - Data passed between programs and transport layer

Question 9

Package switching

Answer 9

Each msg is split into small packs by PAD (Packet assembler/disassembler)

• Who’s your daddy protocol (packet goes around looking for matching node - reassemble a packet and req a URL)

Question 10

What is a Network?

Answer 10

Collection of computers that communicate with one another over transmission lines