INF 123 SW ARCH, DIST SYS & INTEROP

LECTURE 19

Prof. Crista Lopes

Objectives

Recap of the entire course

Lecture 2

Review of Architecture in Software Systems Terminology, Definitions Different Types of Architecture Concrete example: OpenSimulator What lead software

architects/designers/engineers do

Lecture 3

Distributed Systems Recap Computer networks – historical perspective The OSI network model The Internet Basics of TCP

Lecture 4

UDP DNS

Lecture 5

The Web Client-Server architectures Historical perspective of the Web Main design principles Universal Resource Locators HyperText Transfer Protocol operations HTTP requests and responses Web caches Cookies

Lecture 6

Web application programming 3-tier architectures Media types HyperText Markup Language (HTML)

Relation to HTTP Web Programming frameworks

Wifi

Lecture 7

REpresentational State Transfer (REST) Design principles REST application design guidelines

Lecture 8

Web Services Remote Procedure Calls

XMLRPC SOAP

WSDL

Lecture 9

Distributed Objects Java RMI

Lecture 10

External Data Representations Endianess XDR XML JSON

Lecture 11

Software architecture recovery What and why Conceptual vs. as-is

Grid Computing architectures

Lecture 12

Peer-to-Peer architectures Napster Gnutella

Lecture 13

Event-Based Architectures The Internet, in practice

Identification, IP addresses, ports

Lecture 14

Decentralization and security Firewalls Cryptography

MD5 Well-known threats (part1) SLL and HTTPS

Lecture 15

Web application security Well-known threats (part 2) Due diligence

Lecture 16

Authentication and Authorization OpenID and OAuth

Lecture 17

Trust on the Internet Certificates and CAs Public Key Cryptography SSL

Lecture 18

How to program for security The principle of least authority (POLA) Good security ≈ good engineering

Assignments

Slice of the course material in practice: Sniffing packets HTTP REST Web programming Services, connectors Software architecture recovery Firewalls OpenID and related protocols

This course

Many architectures, not just one! Main focus of this course:

Well-known software system architectures Secondary focus:

“Good” software architectures

Expected knowledge

Basic understanding of how the Internet works Proficiency on everything Web

architecture, data representations, HTTP, REST, programming, CAs, …

Confidence upon having to deal with web programming frameworks

Confidence upon having to interact with Web services

Proficiency on identifying security threats in decentralized systems how to handle them

Awareness about non client-server architectures P2P, EB, Grid, etc.