Application Layer Protocols (TCP/IP Suite)

Application Layer TCP/IP

Management Porotocols

• BootP, DNS, DNS, SNMP, NTP

Remote Communcations Protocols

• Telnet, SSH

File Transfer Protocols

• FTP, TFTP

Mail Application  Protocols

• SMTP, Pop3, IMAP4

Browser Protocols

• HTTP, HTTPS, TLS/SSL

Voice Over IP (VOIP) Protocols

• SIP, RTP

BootP - Bootstrap Protocol

• Automates the ip address configuration process
• Replaced by DHCP Dynamic Host Configuration Protocol (A dynamic version of BootP)

DNS - Domain Name Services

• Converts domain names to IP Addresses (so you don't have to remember IP Address of websites)

NTP - Network Time Protocol

SNMP

• Automatically synchronizes clocks

SNMP - Simple Network Management Protocol
Gather Statistics from network devices

• V1 - Structured tables, In-The-Clear.
• V2 - Data Type Enhancements, bulk transfers, still in-the clear (not encrypted)
• V3 Message integrity, Authentication, Encryption

Telnet - Telecommunication Network

• Login to devices remotely
• Unencrypted communication, not the best choice on production systems

SSH - Secure Shell

• Looks and acts the same as telnet
• Encrypted communication link

FTP - File Transfer Protocol

• Transfers files between systems
• Authenticats with a username and password
• Full-featured functionality (list, add, delete, etc.)

TFTP - Trivial File Transfer Protocol

• Very simple file transfer application
• Read and write files
• No authentication
• Not used on production systems

SMTP - Simple Mail Transfer Protocol

• Used most often for sending mail
• Transferring between mail servers

POP3 - Post Office Protocol Version 3

• Receive mail
• Designed for intermittent connectivity

IMAP4 - Internet Message Access Protocol V4

• Another mail client protocol (Pop3 more popular)
• Flexibility in connectivity
• Keeps "State" - Read, Replied, Deleted (see mail as you left it)
• More functional than POP3

HTTP - Hypertext Transfer Protocol

• Internet Access

HTTPS - Hypertext Transfer Protocol Secure

• Same as HTTP with an extra layer of encryption through TLS/SSL

TLS/SSL - Transport Layer Security and Secure Sockets Layer

• SSL was created by netscape
• TLS is the updated IETF (Internet Engineering Task Force) Version of SSL

SIP - Session initiation Protocol (behind the scenes)

• VOIP signaling Protocol
• Builds and tears-down media calls
• Makes sure the call continues

RTP - Real-Time Transport Protocol

• Carries the media stream (Voice and video data)

All Information was learned from Professor Messer