Internet Protocols - CCIE Routing and Switching Exam Certification Guide - page 303

Foundation Summary

The Foundation Summary is a condensed collection of material that provides a convenient
review of key concepts in this chapter. If you are already comfortable with the topics in this
chapter, this summary will help you recall a few details. If you just read the Foundation Topics
section, this review should help solidify some key facts. If you are doing your final preparation
before the exam, these materials are a convenient way to review the day before the exam.

TCP/IP Model Compared to the OSI Model Figure 6-18

OSI Model TCP/IP Architecture TCP/IP Protocols

Application

SNMP , Telnet,
FTP, TFTP, NTP,
NFS, SMTP

Presentation Application

Session

Transport Transport TCP, UDP

IP, OSPF,
RIP, ICMP
Use of lower
layer protocol
standards

Network Internet

Data Link

Network Interface

Physical

IP Header Figure 6-19

0 1 2 3
01234567890123456789012345678901

Version IHL Type of Service Total Length

Identification Flags Fragment Offset

Time-To-Live Protocol Header Checksum

Source Address
Destination Address
IP Options Field

Padding