- OSI
  - Application Layer
    1. SIP
    2. DNS
    3. FTP
    4. RTP
    5. DHCP
  - Presentation Layer
    1. SSL
    2. TLS
  - Session Layer
    1. NetBIOS
    2. SPDY
  - Transport Layer
    1. TCP
    2. UDP
    3. SCTP
  - Network Layer
    1. IP
    2. ARP
    3. ICMP
  - Data Link Layer
    1. ATM
    2. SDLS
    3. LLC
  - Physical Layer
    1. EIA/TIA-232
    2. ITU-T V-Series
    3. DSL
- TCP/IP
  - Application layer
    1. DHCP
    2. DNS
    3. FTP
    4. HTTP
    5. IMAP
    6. LDAP
    7. XMPP
    8. SSH
    9. RIP
  - Transport layer
    1. TCP
    2. UDP
    3. SCTP
  - Internet layer
    1. IP
    2. ICMP
    3. ECN
  - Link layer
    1. ARP
    2. NDP
    3. DSL