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Table Of Contents  CertiGuide to Network+
 9  Chapter 0101:  TCP/IP

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II  TCP/IP Addressing Overview
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I  Concepts & Terms Required - Chapter 0101

In this chapter, we will look at TCP/IP in detail. First, we’ll examine how addressing works, then we’ll look at how it’s made easier by use of name services. After that, we’ll look at how TCP/IP is routed from network to network. Once we know how packets get from place to place, we’ll look at the standard TCP/IP services (application functions like sending email) that are available, and standard TCP/IP diagnostic commands. Finally, we’ll finish up with a discussion of new developments in TCP/IP, as it evolves to better serve its growing community of users.

In this chapter, you also learned about the architecture of the TCP/IP protocol suite, some common user-level features it offers and where TCP/IP is going in the future.

  • Know that TCP/IP services are found at specific ports, and are contacted by client programs, which communicate using the appropriate protocol

  • Common TCP/IP application protocols and their port numbers

  • Name services, and the approaches to them by various vendors

  • When to use various TCP/IP troubleshooting utilities

  • IPv4 vs. IPv6
Definitions You Need to Know
ARP (Address Resolution Protocol)
CIDR (Classless Inter-Domain Routing)
Class A, Class B, Class C, Class D
Default gateway
DDNS (Dynamic Domain Name System)
DHCP (Dynamic Host Configuration Protocol)
DNS (Domain Name System)
Dynamic routing
Domain Name
FTP (File Transfer Protocol)
Fully-qualified domain name (FQDN)
HOSTS file
HTTP (HyperText Transfer Protocol)
ICMP (Internet Control Message Protocol)
ICS (Internet Connection Sharing)
IMAP4 (Internet Mail … Protocol 4)
IP Proxy
IPv4, IPv6
Loopback (hardware and software)
Name Service
NAT (Network Address Translation)
NNTP (Net News Transfer Protocol)
NTP (Network Time Protocol)
POP3 (Post Office Protocol version 3)
QoS (Quality of Service)
SMTP (Simple Mail Transport Protocol)
Static routing
TFTP (Trivial File Transfer Protocol)
UDP (User Datagram Protocol)
Well-Known Services
WINS (Windows Internet Naming Service)

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Chapter 0101:  TCP/IP
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CertiGuide for Network+ ( on
Version 1.0 - Version Date: November 7, 2004

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