Application Layer

• Network Application Architectures
• Protocol Layers
• Network Application Architectures
• Client-Server
• Peer-to-Peer
• Process Communications
• Names, Addresses, Ports
• Transports
• Application Layer Protocols
• Application Arch: Summary
• HTTP
• HTTP Concepts
• HTTP
• Sample Web Page
• Sample HTTP Request Message
• HTTP Request Message Format
• Sample HTTP Response Message
• HTTP Response Message Format
• Hands-on HTTP
• Cookies
• Proxy Server: Web Caching
• Conditional GET
• HTTP: Summary
• Homework 2A
• File Transfer and Electronic Mail
• FTP
• FTP Commands and Replies
• Electronic Mail
• SMTP
• Sample SMTP Exchange
• HTTP vs. SMTP
• Mail Access Protocols
• POP3 protocol
• IMAP
• FTP and Mail: Summary
• Homework 2B
• Domain Name Service
• DNS
• DNS Example
• DNS Hierarchy
• How DNS Works?
• DNS Records
• DNS Message Format
• DNS Registration
• DNS Vulnerability
• DNS: Summary
• Homework 2C
• Peer-to-Peer Applications
• P2P File Distribution (BitTorrent)
• Peer-to-Peer Applications
• Client Server vs. P2P Scalability
• BitTorrent P2P File Distribution
• Distributed Hash Tables (DHTs)
• Circular DHT
• Peer Churn
• Network Address Translation (NAT)
• Skype
• P2P Applications: Summary
• Homework 2D

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