Protocols on CCNA Exam

DNS- Domain Name System

DHCP- Dynamic Host Configuration Protocol

FTP- File Transfer Protocol

TFTP- Trivial File Transfer Protocol

HTTP- Hyper Text Transfer Protocol

Telnet- Telephony Network

SMTP- Simple Mail Transfer Protocol

POP- Post Office Protocol

IMAP- Internet Massage Access Protocol

NetBIOS- Network Basic Input/Output System

TCP- Transmission Control Protocol

UDP- User Datagram Protocol

IP- Internet Protocol

ICMP- Internet Control Massage Protocol

ARP- Address Resolution Protocol

RARP- Reserve Address Resolution Protocol

HDLC- High-level Data Link Control Protocol

SDLC- Synchronous Data Link Control Protocol

There is associated Port number to every Application Protocol.

[Note: to see port number with protocol “c:\windows\system32\driver\etc” open this file with notepad]

OSI Layers and Protocol

Application Layer DNS, DHCP, FTP, HTTP, TFTP, TELNET, SMTP

Presentation Layer Upper Layer POP, IMAP, ETC..&

Session Layer NETBIOS (Session Layer uses only)

Transport Layer TCP, UDP

Network Layer IP, ICMP, ARP, RARP

Data Link Layer HDLC, SDLC, FRAME RELAY

Physical Layer (No protocol is used here, it works with Ethernet or token ring)