In part III of this ISDN primer, we learned that PPP has two main methods of authentication that Cisco certification candidates need to know how to configure: PAP and CHAP.
Laptop Battery PAP has very few advantages over CHAP. PAP passwords are carried over the line in clear-text, which in today's world is a very bad idea. PAP configuration also requires additional configuration with the "ppp pap sent-username" command, so anyone who can see your running configuration can also see the PAP password.
Computer memory is the quickest, cheapest, and easiest way to improve the performance of your system. Find RAM memory upgrades for desktops, laptops, servers, and printers all backed by a lifetime warranty and guaranteed compatible with your computer. Shipping is an everyday low price of $1.99! Computer Memory Outlet sells memory compatible with all leading computer manufacturers like Dell, Apple, Compaq, HP, Sony, IBM, Lenovo, and many more.”
Thinkpad The only advantage PAP has over CHAP is a slim one. With PAP, a different password can be used by the each of the routers involved in the authentication. CHAP requires that the password be the same. Why? We'll see as we examine CHAP authentication.
How does the vendor protect my investment of time and money Let' earning your certification costs time and money. You've got to set time aside to study, you'll need books, perhaps a class, etc. If you're spending that money and time, it should be to make yourself more valuable in the workplace. The vendor should also have a vested interest in keeping your certification valuable. Take Cisco, for instance. I was at a bit of a career crossroads a few years ago. Should I pursue my masters degree, or pursue the CCIE I took a strong look at both choices, and I knew that Cisco works endlessly and tirelessly to protect the value of their certifications. While other major vendors have made strides to do so, I felt Cisco did the best job of protecting the value of their certifications. That's why I felt secure in the investment of my finances and time into a major Cisco certification, and I've never made a better decision.
Microsoft The First Step to Configuring CHAP
laptop computers is driving strong sales for notebook computers, according to the latest quarterly sales figures from the research firm IDC, which reported a 37% computer sales for the second quarter, compared with a year earlier. In the U.S., laptop sales grew 17.7%, while sales of desktop computers and servers fell 4%. The New York Times ( 10), CNET ( 10)
Laptop Computers CHAP requires you to configure a username / password combination for any remote device that will be involved in authentication. (We're assuming that the routers have already been configured with their names via the global hostname command.) Both routers will use the password CISCO.
The Cisco Certified Internetwork Expert (CCIE) certification is considered the most prestigious IT certification currently available in the IT world. CCIEs must show the ability to design, install, and configure highly complex networks. For rmation on the CCIE program, visit the related page on the Cisco Web site.
Laptop Computer R1:
As a rental organization ICC has kept strong focus on service by following strict quality control procedures and providing 24 hour a day, 7 day a week technical support on every computer rental. Feel secure when renting a computer from iccrents.com. Rent Laptops from Quick, 1000 laptops in stock, HP, CPQ, Dell, IBM, 24x7 Support, Same Day deliveries available nationwide. 20 years of experience.
Desktop Computer username R2 password CISCO
Notebooks int bri0
Lenovo encapsulation ppp
Hard Drive ppp authentication chap
Travelstar R2:
Gateway username R1 password CISCO
Laptop Parts int bri0
Software encapsulation ppp
Hard Drives ppp authentication chap
Electronics Why CHAP Authentication Requires The Same Password On Both Routers
Canon Remember how PAP sends the password over the line in clear-text? CHAP does not actually send the password over the line at all. Instead, CHAP runs a hash algorithm using the password and a random number. It is the result of this hash that is passed over the link. The remote router receives the hash result, and runs the exact same algorithm. If the result is the same, the authentication attempt will be successful. If the result is different, the authentication will fail. For this reason, the passwords must be the same.
Desktop Pc Debug The Connection If Authentication Fails
Desktop Computers Since two passwords are involved, the chances of one of the passwords being mistyped doubles. If you configure CHAP and the link dials but drops almost immediately, there's an authentication problem. Run debug ppp negotiation and attempt to dial the line again. The output of this particular debug will show you where the problem is.
Think Pad
Repair Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage (http://www.thebryantadvantage.com), home of free CCNA and CCNP tutorials, The Ultimate CCNA Study Package, Ultimate CCNP Study Packages, and CCNA CBT video training. Pass the CCNA exam ,BSCI exam , and BCMSN exam with Chris Bryant, CCIE #12933!
Data Recovery For a copy of his FREE "How To Pass The CCNA" or "How To Pass The CCNP" ebook and receive a FREE CCNA and CCNP question every day, just visit the website and claim your free copies!
[ Comment, Edit or Article Submission ]
