Friday, January 18, 2008

Cisco CCNA Certification Exam Training: Telnet, Passwords, and Privilege Levels

Your CCNA certification exam is likely going to contain questions about Telnet, an application-level protocol that allows remote communication between two networking devices. With Telnet use being as common as it is, you had better know the details of how to configure it in order to pass your CCNA exam and to work in real-world networks.

The basic concept is pretty simple - we want to configure R1, but we're at R2. If we telnet successfully to R1, we will be able to configure R1 if we've been given the proper permission levels. In this CCNA case study, R2 has an IP address of 172.12.123.2 and R1 an address of 172.12.123.1. Let's try to telnet from R2 to R1.

R2#telnet 172.12.123.1

Trying 172.12.123.1 ... open

Password required, but none set

[Connection to 172.12.123.1 closed by foreign host]

This seems like a problem, but it's a problem we're happy to have. A Cisco router will not let any user telnet to it by default. That's a good thing, because we don't want just anyone connecting to our router! The "password required" message means that no password has been set on the VTY lines on R1. Let's do so now.

R1(config)#line vty 0 4

R1(config-line)#password baseball

A password of "baseball" has been set on the VTY lines, so we shouldn't have any trouble using Telnet to get from R2 to R1. Let's try that now.

R2#telnet 172.12.123.1

Trying 172.12.123.1 ... open

User access Verification

Password:

R1>

We're in, and placed into user exec mode. Let's say we want to configure a new IP address on the ethernet interface on R1. We'll now go into privileged exec mode....

R1>enable

% No password set

R1>

.. or maybe we won't! The default behavior of Telnet on a Cisco router is to place the incoming user into user exec mode, and require an enable password to allow that user into privileged exec mode! right now, we can't configure anything on this router and even the show commands we would use are limited at best.

If we wanted to allow all telnetting users to be put into privileged exec mode immediately without being prompted for an enable password, the command privilege level 15 placed on the VTY lines will accomplish this.

R1(config)#line vty 0 4

R1(config-line)#privilege level 15

From R2, we'll telnet into R1 again.

R2#telnet 172.12.123.1

Trying 172.12.123.1 ... open

User access Verification

Password:

R1#

We were able to telnet in from R2 with the original password of "baseball", and even better, we were placed into privileged exec mode immediately!

You may or may not want to do this in real-world networks, though. If you want to assign privilege levels on an individual user basis, configure usernames and passwords and use the privilege 15 command in the actual username/password command itself to give this privilege levels to some users but not all.

R1(config)#username heidi password klum

R1(config)#username tim privilege 15 password gunn

Both users can telnet into the router, but the first user will be placed into user exec and challenged for the enable password to enter privileged exec mode. If there is no enable password, the user literally cannot get into privileged exec. The second user will be placed into privileged exec immediately after successfully authenticating.

Passwords on a Cisco router or switch are vitally important, and you're not tied down to granting "all-or-nothing" access. Knowing the details like the ones shown here help you tie down network security while allowing people to do their jobs - and it doesn't hurt to know this stuff for the CCNA exam, either!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage (http://www.thebryantadvantage.com).

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Golf Ball Striking Tips - Improve Your Golf Swing Today (Part II)

When addressing the ball, most PGA tour players bend forward approximately 36 degrees. The average golfer will usually set up with either too much or too little forward bend causing them to lift the upper body at the top of the swing and at impact. this almost always results in inconsistent shotmaking and bloated golf scores. Here are a few golf ball striking tips to keep those scores down.

Proper Shoulder Tilt
Proper shoulder tilt plays a huge role in golf ball striking and the overall golf swing. It's major impact is on weight transfer during the swing. The average golfer will set up with level shoulders and no shoulder tilt. this will cause them to lean towards the target with their shoulders.

Most professional golfers will tilt their shoulders slight to the right when addressing the ball. this will help to position their body behind the ball at the right spot for an effective weight shift during the swing. Pay attention to your shoulder from the top of your swing, to ball impact. You want your spine to move farther to the right on your downswing. Ensuring your shoulders are tilted properly is one of the most important golf ball striking tips you can learn.

Increase Side Bend
When you are in the middle of your swing at your club is at the top, you want to try and increase your side bend. In order to increase your side bend, you want to tilt your upper torso slightly to the right by 10 degrees or more. It helps me to feel like I am moving the top of my spine away from the target than the bottom in the middle of your backswing.

As you start to bring your club down to strike the ball, you want to slowly move the top of your spine farther away from your target. Try and bend your spine about 20 degrees. this will position your right shoulder just under your left shoulder as you swing your club to strike the ball. this will help to ensure that your club is on the right path through your downswing, and helps to maximize clubhead speed. Practice the last two golf ball striking tips, and your golf game will really benefit.

want to learn the swing Secrets of the Pros with FREE Golf Video Lessons delivered weekly via email? Visit my website below to sign up and start receiving your free weekly golf video tips via email!

http://www.FreeGolfVideoLessons.com

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One Bad Golf Hole

Do you have one golf hole that always gets you?

Jim is a 12 handicap golfer. He absolutely loves the game and can't seem to get enough. He buys a new set of equipment about every 2 years or so and watches golf on TV whenever he can. He really enjoys following the pro tours and trying to guess who will win on any given sunday.

Jim's club tournament is coming up soon. He can't wait. His game has been steadily improving over the season and he feels he's ready for this. A couple weeks ago he shot his best score ever on his home course, a 3 over 75! He knows he's got it in him and maybe even lower since he had a double bogey on one in that round of 75.

As tournament weekend approaches, Jim begins to psyche himself up. He's very excited and even antsy. He has kept himself in great shape and followed a prescribed practice routine by his teaching pro for the last 2 weeks without missing a single day.

this tournament is his! He can feel it.

He walks up to the first tee of the tournament and he stripes it right down the middle. He finishes the first hole with a par and a great relief comes over him as he prepares to settle down and get serious. He plays well over the next 10 holes until he comes to hole number 12.

Hole number 12 is a very narrow long par 4. On one side of the fairway is a lake and the other is out of bounds. It's a tough hole and Jim has this thing about hole 12. It always seems to get the best of him. He hates it! this is the hole that he double-bogeyed on when he had his career round. He thinks it has his number.

Sure enough, Jim plays hole 12 like he always does and chokes on it this day as well.

He finishes the tournament in second place by 2 strokes. He looks back on it and wonders why, why he just can't get past that hole 12...

Does this story sound familiar to you? Do you have a golf hole or maybe two golf holes on your favorite course that always seems to get the best of you? Do you walk up to that tee and immediately feel a shudder run through your body? A tenseness or tightness?

Well, I want to tell you that this is good news! What, are you kidding me? How the heck can this be good news?

Because it says that you have the automatic mechanism! That is, your body responds automatically to certain situations. You can use this in your favor instead of being a victim to it like Jim.

Is consistency important in golf? Duh, of course! It's the holy grail of scoring! Well, if you automatically have a reaction to a certain hole and seem to play it bad every time, well then, guess what - you are showing consistency. this is a resource that you have and you've used it before and it's served you well and sometimes it hasn't.

You see, the mechanics of what is happening inside your mind and body are exactly the same when you go up to a hole that you hate and when you perform your preshot routine to a perfect consistency resulting in the shots you know how to do.

The only difference is in how you have chosen to think about each of the situations.

Begin to think right now how many times you've been automatically consistent in your golf game, good, bad, or otherwise. You see, your body and unconscious mind don't make judgements as to whether something is good or bad. It just does it. Your awake, conscious mind has that job. It also has the job of deciding whether or not this resource you possess called "consistency" is something you have to wait around for luck to happen...or you can choose it .

I think you know the answer to that one...don't you?

Greens and fairways,

Craig Sigl, the Golf Anti-practice expert, is a Master and Trainer of Hypnosis, NLP and Timeline techniques. He plays to a 5 handicap and teaches his methods worldwide. Visit Golf Instruction Tip to receive a free digitized golf book and ezine "Golf legends and Gurus"

Yoga Cl In Grapevine Texas

Sony Delays Playstation 3

As a result of problems related to the mass production of a key component of its Blu-ray DVD player, Sony (SNE) will delay the European launch of its next generation video game console, the PlayStation 3 (PS3). Sony will also reduce the number of PS3 units immediately available in both the U.S. and Japan.

In the U.S., the ps3 will launch on November 17th, with approximately 400,000 consoles available for sale. The U.S. launch will come almost a week after the Japanese launch which will consist of merely 100,000 units.

Sony's PlayStation 3 is the successor to the PlayStation 2, the world's most popular (and as recently as July, the world's best selling) video game console.

The Number That Really Matters

The fact that there will only be 400,000 ps3 units available for sale in the United States on November 17th is totally unimportant. The launch date itself is unimportant. What matters is how many units will be available for sale in mid to late December.

Sony claims it will have 1 million to 1.2 million consoles available for sale by December 31st. I think it's safe to assume they don't plan to have many arrive between December 26th and December 31st. So, let's assume there will be at least a million ps3 consoles available for sale in the U.S. by Christmas.

Will that be enough to put a PlayStation in the living room of every household that wants one?

No. There will almost certainly be many people who have to go without a ps3 for Christmas, despite being willing to pay the very high price Sony is asking. But, that's nothing new. Other consoles (including the Xbox 360) have been launched without an adequate number of units immediately available for sale.

This isn't like failing to get enough Glad trash bags on store shelves. Once the console has launched, limited availability shouldn't cause many people to switch their planned purchase. If they want it and it's out, they'll wait for it.

A delay is much worse than a mere shortage. There's a promise (and a tangible product) behind a console that has already launched. So, very few people in the U.S. or Japan who planned to buy a ps3 are likely to change their minds because of a Christmas shortage no matter how severe.

The Things That Really Matter

The success of any gaming platform is largely based on five factors:

Available Titles

Relative Launch Date

Price

Predecessor's Installed Base

Technology

Of these five, technology is by far the least important factor. The four most important factors (available titles, relative launch date, price, and predecessor's installed base) are difficult to separate. Clearly, having a predecessor with a large installed base (such as the PS2) can be tremendously beneficial, if you get satisfactory marks in the other three areas (titles, launch date, and price).

Predecessor's Installed Base

The PlayStation 3 dominates when it comes to having a predecessor with a large installed base. So, how does it score in the other three areas?

In terms of available titles, the ps3 scores as well as any of its competitors, if not better. However, none of the three consoles (Xbox 360, ps3, or Wii) does very well in this regard. Unfortunately, the titles are likely to be somewhat segregated by console. There will be quality games on each system; but, almost no one will buy all three. Simply put, there will be some games exclusive to each console that a lot of people would really love to play but can't.

Also, there's the danger that both the ps3 and the Xbox 360 will be seen as the more adult and less casual consoles. Microsoft (MSFT) and Sony have Nintendo to blame for this but, let's put that issue aside for now.

Relative Launch Date

Returning to the list of factors that determine a console's success, let's consider the launch date issue. Sony clearly has a bit of a problem in Europe, because it will have one less Christmas season than both the Xbox 360 and the Wii. Some analysts think Sony will lose no more than a few hundred thousand console sales to substitutions. If that's true, lost revenue might be in the hundreds of millions rather than the billions.

Strong sales of the Xbox in Europe during the Christmas season would be a very bad indication for Sony. The combined price of an Xbox and a ps3 is prohibitively expensive. Furthermore, the two consoles are far more similar to each other than they are to the Wii. As a result, while some European Wii sales might be recoverable by Sony at a later date, because individuals will choose to buy the Wii first and the ps3 later, very few Xbox 360 sales would be recoverable. Essentially, every Xbox sold in Europe this Christmas is a ps3 that will never be born.

Three Separate Markets

The U.S., Japan, and Europe are really three very different markets. It's quite possible you could have a console that is very successful in one market and yet unable to get any real momentum in another.

Before this delay, I felt strongly that Europe was the market where the ps3 could come closest to duplicating the performance of the PS2 in terms of market share. There's a long-term danger that Microsoft will gain market share in the U.S. and Nintendo will gain market share in both the U.S. and Japan.

Obviously, Europe isn't as well defined a market as either the U.S. or Japan. So, it's much harder to predict how a certain type of console or a certain type of game will go over there. The U.S. and Japan are very clearly defined game markets, largely because they have very clearly defined consumer cultures in general and entertainment cultures in particular.

So, what does the ps3 delay mean for Sony's future in Europe? It's hard to say. I'm more interested in seeing what the installed base of each next generation console will look like in the American and Japanese markets after Christmas 2007, when we'll have the first real chance to predict how this round of the console wars will play out.

Of course, there are some predictions that seem pretty safe even now. For instance, it seems safe to say Sony will lose worldwide market share. Simply put, the ps3 won't be able to duplicate the market share dominance of the PS2.

So, most likely we're talking about Sony's PS3 falling somewhere north of catastrophic failure and south of market share gains. Although I think both of these scenarios are extremely unlikely, catastrophic failure is more likely, simply because improving upon the PS2's market share seems a near impossibility given the much tougher competition this time around.

Is there a real risk that the PS3 might end up being a catastrophic failure? I don't think so, simply because of the number of PS2 systems still out there. Price combined with solid competition on both of Sony's flanks is the only thing that could cause such a failure. If the price prevents widespread acceptance of the system, third party publisher support would be a problem down the line. Nintendo doesn't need a lot of third party support. Sony does.

Although I do think Sony is doing serious harm to its PlayStation line by insisting upon including Blu-ray and charging a ridiculous price, I don't think any amount of managerial ineptitude is likely to cause the catastrophic failure of a successor to such a dominant console as the PS2.

Price

If price isn't the elephant in the room, it should be. Most of the articles I read about the recently announced PS3 delay / production scale-down didn't say much about the pricing of the PS3. That's a mistake especially, because several articles mentioned the laptop battery recall, which has nothing to do with the PS3 and very little to do with Sony (it has everything to do with lithium-ion batteries irrespective of their manufacturer).

The PS3's price is a big problem. One that might have manifested itself in poor Christmas sales, if the number of units available for sale had approached the expected demand. For now, Sony is planning on having so few units available in the U.S. by Christmas that the launch will go well even if the PS3 is ultimately a failure. Sony claims it will have 6 million units by the end of its fiscal year. A few analysts are skeptical, but Sony is sticking to that line.

In the weeks ahead, expect Sony to make a big deal about the fact that it will actually make more PS3 units available by the end of December than the number of Xbox 360s Microsoft had made available by the same time the year before. It's a valid point. But, it omits two key facts. The PS3 is launching after the Xbox 360 and there are more PS2 owners out there who will want to trade up for the new system.

Since the PS3 is launching after the Xbox 360, no one is waiting around to see what the alternative will look like. They already know what the Xbox 360 is, what it can do, and what (some of) the games available for it are. As soon as the PS3 launches, the comparisons can begin. That wasn't possible when the Xbox 360 launched and everybody knew the PS3 was on its way.

The second reason why no parallel exists between the demand for Xbox 360s at launch and the demand for PS3s at launch is simply that there are more PS2s out there. As a result, Sony having as many units available by Christmas as Microsoft had the year before would be a lot like Gillette having as many new razors available as Schick had produced the year before. The difference in market share obliterates any possible comparison.

So, even though I think the PS3 is far too expensive going into the Christmas season, I'm quite sure that fact won't be evident in the sales numbers, because there will be a severe PS3 shortage throughout 2006. Even if the PlayStation 3 is too expensive, it will look like it's selling well, because there simply won't be enough of them produced in 2006.

Why am I so convinced the PS3 is priced too high?

The PS3 is too expensive to be a Christmas gift. Around Christmas, a lot of these consoles are bought by parents as gifts for their kids. Parents are willing to pay a lot for them, because they're a huge one-time item for the kid (and the parents have been hearing about it since well before the launch). But, the prices likely to be charged in 2006 for the PS3 are simply beyond what parents are willing to spend.

It's not an issue of how much consumers have to spend versus the value they're getting. It's an issue of being psychologically unprepared for paying this kind of price for any gift.

It may be a price older gamers are willing to pay to get a PS3 for themselves. But, it's not a price parents will be willing to spend on their kids.

Geoff Gannon writes a daily value investing blog and produces a twice weekly (half hour) value investing podcast at: http://www.gannononinvesting.com

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