Introduction Networks

Question 1

Client

Answer 1

A device that enables users to access the network

Question 2

Server

Answer 2

A device that provides services to clients

Question 3

Circuit

Answer 3

All cables, radio links and devices in between that enables the communication between clients and servers

Question 4

Switch

Answer 4

device that connect multiple devices to form a LAN

Question 5

Router (what does it do?)

Answer 5

connects different networks together.

Question 6

IP address

Answer 6

unique address to identify each device in a network as the receiver of a message. . Each device needs an IP address for sending, receiving information and connecting to other routers

Question 7

LAN

Answer 7

Local Area Network. Group of client/server(s) that share a local circuit (connected w/ switches and cables or radio waves). Usually limited to a single building, or a single floor of a building

Question 8

BN

Answer 8

Backbone Network. Connects multiple LANs using routers. Usually don’t contain clients or servers but serve as the circuit the connects the different LANs. Quite high speed as they need to handle all network traffic. Ex. different floors of a buildings. operated and owned by the organisation that uses them like Monash

Question 9

MAN

Answer 9

Metropolitan Area Network. Can span several km. Connects LANs and BNs over different locations. Usually leased from a third party telecommunications company.

Question 10

WAN

Answer 10

Connects networks over large distances. Ex. connecting MSA and Monash Malaysia.

Question 11

Transmission rate

Answer 11

Measure of the speed of a connection

Question 12

How many Mb in a GB?

Answer 12

1 GB x 8b = 8 Gb
8Gb x 1000b = 8000Mb
Ans : 8000Mb

Question 13

Latency

Answer 13

The length of time for 1 bit of data to travel from a sender to a reciever

Question 14

Presentation logic

Answer 14

part of the application that provides the UI

Question 15

Application logic/ business logic

Answer 15

Defines how the application behaves (what should happen when a button is clicked)

Question 16

Data access logic

Answer 16

Defines how the application manages its data (updating text docs when a user makes changes)

Question 17

Data storage

Answer 17

Where the data is kept

Question 18

Application architectures

Answer 18

the different methods which work can be split up between the client and the server

Question 19

Server-based architectures

Answer 19

Presentation logic, application/business logic/ data access logic and data storage is performed by the server.

Question 20

Advantages of server-based architectures

Answer 20

• Enables multiple user to access a single, main computer

- Any update is immediately available to all users

Question 21

Dis-advantage of server-based architectures

Answer 21

• Upgrading the hardware means replacing a very expensive computer instead of inexpensive terminals

Question 22

Client-based architecture

Answer 22

Only places the data storage on the server whilst the presentation, application and data access logic are performed by the client

Question 23

Dis-advantages of client-based architecture

Answer 23

Incredibly difficult to make small changes to a file, as the entire file directory need to be downloaded over the network to your client. Puts enormous stress on the network, and even bigger problems when multiple user are attempting to gain access.

Question 24

Advantages of client-based architecture

Answer 24

• Central file storage
• Allows for multiple users to work on the same file at the same time
• Central back-up machine

Question 25

Client-server architecture

Answer 25

Client only performs the presentation and application logic. Server implements the data access and storage.
(Think queries)

Question 26

Thin-client architecture

Answer 26

Client performs only presentation logic, and server implements application and data access logic and data storage

Question 27

Mult-tier architecture

Answer 27

Tasks are further split because of millions of users. Dedicated servers are set for application logic and dedicated ones for the data access and storage

Question 28

Peer-to-peer

Answer 28

Does not use servers at all. Connects multiple clients to each other
(Think file sharing apps)