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Which of the following protocols are used in the Application layer of the TCP/IP model? (Choose three).
IP
Ethernet
TCP
Telnet
FTP
SMTP
Common Application TCP/IP protocols used: Telnet, FTP, TFTP, NFS, SMTP, POP3, DHCP, SMTP, DNS, SNMP. Transport layer protocols used are TCP and UDP. At the Internet layer, IP is used with ARP, ICMP and IGMP as auxiliary protocols for IP. Common Network Interface Layer protocols are Ethernet, Token Ring, Frame Relay ATM, PPP. For more information refer to: [Todd Lammle. - CCNA Routing and Switching Study Guide, Chapter 1]
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