Thursday, February 28, 2008

Network Topologies

star / hierarchical - Computers in a star topology are connected by cables to a hub. In this topology management of the network is made much easier (such as adding and removing devices), because of the central point. However because it is centralized more cable is required.

Bus - In bus topologies, all computers are connected to a single cable or "trunk or backbone", by a transceiver either directly or by using a short drop cable. All ends of the cable must be terminated, that is plugged into a device such as a computer or terminator. Most bus topologies use coax cables.

Mesh - A Mesh topology Provides each device with a point-to-point connection to every other device in the network. These are most commonly used in WAN's, which connect networks over telecommunication links. Mesh topologies use routers to determine the best path.

Ring - In a ring topology network computers are connected by a single loop of cable, the data signals travel around the loop in one direction, passing through each computer. Ring topology is an active topology because each computer repeats (boosts) the signal before passing it on to the next computer.

wireless - A wireless network consists of wireless NICs and access points. NICs come in different models including PC card, ISA, PCI, etc. access points act as wireless hubs to link multiple wireless NICs into a single subnet. access points also have at least one fixed ethernet port to allow the wireless network to be bridged to a traditional wired ethernet network, such as the organizations network infrastructure. wireless and wired devices can coexist on the same network.

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Golf Alignment - Two Great Tips

How you align yourself when setting up to hit a golf ball has a critical affect on how good your golf shots are going to turn out. But don't believe me. Read what a golf legend has to say on this alignment issue

"It goes without saying that it is no good having a perfect setup, perfect grip and perfect golf swing if the whole thing is misaligned. It sounds obvious but many players simply do not spend enough time getting themselves on target."

Nick faldo - Winner of 6 major Championships

So hopefully you now understand the importance of golf alignment. And if you do, here's a simple exercise that you can quickly and easily do to check your feet alignment.

To do this golf alignment exercise I want you to setup to a golf shot as normal and get comfortable. Then just before you're ready to hit your shot, get two golf balls and without moving your feet place them directly behind your heels so they're touching your feet. Now take your feet away and go back behind your ball down the line of your target and see how good your alignment was.

The beauty of doing this golf alignment exercise is that it shows you exactly where you are aligning your feet and then you can simply change the golf balls so they align correctly and then setup with these balls touching your heels. If your feet have been aligned incorrectly for a while then it will feel quite strange when you align them correctly. But keep practicing and before long, your new feet alignment will become second nature.

So that is a great and easy way to check the alignment of your feet. But you still have to check the alignment of your knees, hips and shoulders as they also have a big affect on your golf shots success. And the absolute best way of checking this is to get a person to get a golf club and lay it across each part of your body once you've setup to a shot. But remember, you want each part of your body to be aligned parallel to the starting line of your golf shot.

You do NOT want your body to be aligned directly at your target. A good way to picture this is to imagine yourself setting up to hit a golf shot on railway tracks. Imagine the golf ball on one rail and you're standing on the other rail.

golf alignment is critical to your success and consistency so check it often, because it's very easy to align yourself incorrectly without even knowing. But now you know exactly what you need to do to check your alignment so you have no excuse. So please make an effort to check it often...because it can only do your golf game good.

Nick Bayley is a professional golfer who has discovered just one golf swing fault that could be stopping you from ball striking consistency and success. But luckily for you, now you can take a simple 2 minute golf swing test to see if you have this swing fault or not. So don't delay! Go here to take The Golf Swing Test now

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Super Bowl Preview

Its been a while since weve seen the Steelers in a super Bowl (10 years). And weve never seen the Seahawks in the big game. Both teams have two weeks to prepare and come off relatively easy wins in the championship games. This game is at a neutral site indoors (Detroit), but does anything stand out as far as how these teams fared on the road this season? The Steelers are playing their best football at the right time of the year, riding a 7-0 SU, 6-1 ats run the last 7 games. most impressive is that they were the No. 6 seed in the AFC and come off wins against the Bengals, Colts and Broncos all on the road! That makes Pittsburgh 8-2 SU/ATS on the road this season! Seattle is only 5-3 SU, 4-4 ATS on the road, although they did average an impressive 27 ppg away from home. Edge to the Steelers.

Philosophically, both teams are similar. Coaches Bill Cowher and Mike Holmgren are veteran coaches whove taken their teams to the super Bowl before. Holmgren makes his third trip, winning once and losing once with the Packers. Both coaches have built their teams with a philosophy around ball control and balanced offenses. Each team has a bruising running back and strong offensive line play.

It was interesting that the last few weeks both teams didnt play conservative, which has been their reputation. Pittsburgh came out throwing the ball often against the Colts and Broncos, and threw several trick plays at the Bengals. In the past, Cowher has leaned more toward running the football, critics say too much, but that hasnt been the case in this playoffs. Dont be surprised if both teams come out throwing the ball and mixing up the plays. The difference this season for Pittsburgh is probably that Cowher has a talented young quarterback who is an excellent decision-maker. Cowher clearly has trust in letting big Ben Roethlisberger throw the football. That wasnt the case over the last ten years when he was stuck with below-average QBs such as Bubby Brister and Kordell Stewart.

Think back to last years super Bowl when two fine QBs squared off in Donovan McNabb and tom Brady. Brady was calm the whole game because he was playing in his third super Bowl in four years. McNabb, on the other hand, was erratic, especially early on, overthrowing several receivers and tossing too many lollipop passes, one of which Rodney Harrison intercepted in the end zone in the first quarter. Nerves can get to QBs playing in their first super Bowl with the whole world watching!

The fact that the game is indoors is probably a wash, favoring neither team. Experience is another factor to consider. Even though neither team has super Bowl experience of late, Id give an edge to the Steelers. Pittsburgh was 16-2 last season and hosted the AFC championship game, losing to the Patriots. That experience factor has helped this postseason, especially since they played three games on the road in hostile environments in Cincinnati, Indy and Denver. And they played smart, mistake-free football. Seattlemade the playoffs last season, but flamed out in the first round against the Rams. Then, this year, they had an edge with home field, but played two playoff games against teams with several flaws in Washington (little offense) and carolina (too many injuries, down to their third string back). Also, Seattle doesnt have a lot of big-game experience away from home.

Looking back on this season, Seattle barely won on the road at St. louis and Tennessee. And the Seahawks lost 23-17 at green Bay (their last road game), 20-17 at Washington and 26-14 at Jacksonville to open the season. Also note that Seattles defense allowed 21 ppg on the road where they are 7-1 'Over' the total. Pittsburgh has opened up the offense more in the second half of the season and carries a 5-2-1 run 'Over' the total into the super Bowl. The Steelers also have more experience playing indoors: since Thanksgiving, theyve played three games indoors, one at minnesota and two at Indianapolis, going 2-1 SU/ATS.

Finally, games are often won and lost via turnovers and in the trenches. I cant predict turnovers, but I can point out that in the trenches, both teams were outstanding at stopping the run this season, and each ranked in the Top 5 in the nfl. On paper, its a wash in the trenches, which possibly means turnovers will be the la difference, as the french say! super Bowl 40 should be a fun one to dissect over the next two weeks and watch. Good luck as always...Al McMordie.

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