Chapter 2

INFO 330 Computer Networking Technology I Chapter 2 The Application Layer Glenn Booker INFO 330 Chapter 2

Application Layer ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Client-server Architecture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Client-server Architecture ,[object Object],[object Object],INFO 330 Chapter 2

P2P Architecture ,[object Object],[object Object],INFO 330 Chapter 2

P2P Architecture ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Hybrid Architecture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Process Communication ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Sockets ,[object Object],[object Object],[object Object],INFO 330 Chapter 2

Sockets INFO 330 Chapter 2 Could be UDP on both ends

Sockets ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Addressing Processes ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Addressing Processes INFO 330 Chapter 2 Sockets send packets Ports listen for them

Port Number ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

More Protocols ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Application vs its protocols ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

RFC Summary ,[object Object],[object Object],INFO 330 Chapter 2

Application Services ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Application Services ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

TCP Services ,[object Object],[object Object],[object Object],INFO 330 Chapter 2

TCP Services ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

UDP Services ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Services NOT Provided ,[object Object],[object Object],[object Object],INFO 330 Chapter 2

Application Protocols ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

The Web and HTTP ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

HTTP ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

HTTP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

More Delays! ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

RTT Delay ,[object Object],[object Object],INFO 330 Chapter 2

Persistent Connection ,[object Object],[object Object],[object Object],INFO 330 Chapter 2

Persistent Connection ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

HTTP vs HTML ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

HTTP Messages ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

HTTP Messages ,[object Object],[object Object],[object Object],INFO 330 Chapter 2

HTTP Requests ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

HTTP Requests ,[object Object],[object Object],[object Object],INFO 330 Chapter 2

HTTP Responses ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

HTTP Responses ,[object Object],[object Object],[object Object],INFO 330 Chapter 2

HTTP Entities ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

HTTP ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Cookies! ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Cookies ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Cookies ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Other HTTP Content ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Web Caching ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Web Caching ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

FTP ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

FTP ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Electronic Mail ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Electronic Mail ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Electronic Mail ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

SMTP ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

SMTP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

SMTP vs HTTP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Mail Message Formats ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

MIME ,[object Object],[object Object],[object Object],INFO 330 Chapter 2

MIME ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

MIME ,[object Object],[object Object],INFO 330 Chapter 2

Uuencode and uudecode ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Mail Access Protocols ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

POP3 ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

POP3 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

POP3 ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

IMAP ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

IMAP ,[object Object],[object Object],INFO 330 Chapter 2

Web Email ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

DNS ,[object Object],[object Object],[object Object],* Humans who read English, at least! INFO 330 Chapter 2

Host vs Domain Names ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

IP Addresses ,[object Object],[object Object],[object Object],INFO 330 Chapter 2

DNS ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Reverse DNS Lookup ,[object Object],[object Object],[object Object],INFO 330 Chapter 2

DNS ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

DNS Structure ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

DNS Structure ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

DNS Lookup ,[object Object],[object Object],[object Object],INFO 330 Chapter 2

Recursive vs Iterative Queries ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

DNS Records ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

DNS Records ,[object Object],[object Object],[object Object],The Start of Authority ( SOA) resource record indicates that this DNS name server is the best source of information for the data within this DNS domain INFO 330 Chapter 2

New resource record types ,[object Object],[object Object],[object Object],From Ubuntu Server Admin and Reference , R Peterson, 2009 INFO 330 Chapter 2

DNS Messages ,[object Object],[object Object],INFO 330 Chapter 2

nslookup ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

DNS Changes ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

DNS and security ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Peer-to-Peer File Sharing ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

P2P File Distribution ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

BitTorrent ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

BitTorrent ,[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Peer-to-Peer File Sharing ,[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Peer-to-Peer File Sharing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INFO 330 Chapter 2

Skype ,[object Object],[object Object],[object Object],INFO 330 Chapter 2

Peer-to-Peer File Sharing ,[object Object],[object Object],[object Object],INFO 330 Chapter 2

Chapter 2

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