TCP/IP Protocol Stack

Question 1

Application

OSI Layer 7, 6, 5

Answer 1

(7) BGP, DHCP, DNS, FTP, HTTP, IMAP, IRC, NNTP
(6) NTP, POP, RIP, SMTP, SNMP, SOAP, SSH, TELNET
(5) SSL/TLS and many others

Question 2

Transport

OSI Layer 4

Answer 2

TCP, UDP, and a few others

Question 3

Internet

OSI Layer 3

Answer 3

IPv4, IPv6, ICMPv4, ICMPV6, IPSec

Question 4

Network Access

OSI Layer 1 and 2

Answer 4

ARP, InverseARP, ATM, L2TP, PPP, Media Access Control (Ethernet, DSL, ISDN, FDDI), Frame-Relay, and others.