Read this whole guide offline with no ads, for a very low price!
Click Here!
Use coupon code "certiguide" to save 20%!
(Expires 2004/12/31)

NEW! Network+ N11-003 2005 Beta Exam Study Guide - Just $9!
Get It Here!

Custom Search







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

Previous Topic/Section
Class C
Previous Page
Pages in Current Topic/Section
1
Next Page
Hardware Loopback Connections
Next Topic/Section

IV  Loopback Addressing and Connections

The special address 127.n.n.n is reserved for the use of local loopback testing. The typical use for this is troubleshooting. If you type ping and get nothing, something is wrong with the installation of TCP/IP on the local machine. If it responds with “Reply from” and some data, then you know that the TCP/IP protocol is installed and functioning. The example shows how to use the diagnostic TCP/IP utility command PING to test the local host (machine). Typing ping 127 followed by any other three sets of digits valid in a TCP/IP address (conventionally 127.0.0.1) produced the successful result in the example. Using the 127.n.n.n address allows you to perform software-based loopback testing, meaning that we didn’t have to do anything with the network hardware itself to use it.

Figure 41: PING 127

 

Quick navigation to subsections and regular topics in this section



Previous Topic/Section
Class C
Previous Page
Pages in Current Topic/Section
1
Next Page
Hardware Loopback Connections
Next Topic/Section

If you find CertiGuide.com useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider buying an inexpensive PDF equivalent of the CertiGuide to Network+ from StudyExam4Less.com. (Use coupon code "certiguide" by December 31, 2004 to save 20%!) Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

CertiGuide for Network+ (http://www.CertiGuide.com/netplus/) on CertiGuide.com
Version 1.0 - Version Date: November 7, 2004

Adapted with permission from a work created by Tcat Houser and Helen O’Boyle.
CertiGuide.com Version © Copyright 2004 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.