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Network+ CCNA Certification Exam Tutorial: Port Numbers And Troubleshooting Computers Articles | October 25 Jamal Adams Big Tall Jersey , 2006
You need to learn port numbers to pass the Network+ and CCNA exams, but do you need to know them for real-world networking? Learn why this knowledge is valuable for the exam room and the server room from Chris Bryant, CCIE #12933.
Passing the Network+ and CCNA exams demands that you know quite a few port numbers Sam Darnold Big Tall Jersey , but they're important to know when working with real-world networks as well. Before we discuss why, here's a partial list of important port numbers to know for these certification exams:
Ports 20 and 21 are used by File Transfer Protocol (FTP).
Port 22 is used by Secure Shell (SSH).
Port 23 is used by Telnet.
Port 25 is used by Simple Mail Transfer Protocol (SMTP).
Port 53 is used by DNS.
Port 69 is used by Trivial File Transfer Protocol (TFTP).
Port 80 is used by HTTP.
Port 110 is used by POP3.
Port 143 is used by IMAP.
Port 443 is used by Secure HTTP (HTTPS).
When you're faced with a list such as this, there's a temptation to ask yourself something like this: "Besides passing the exam Le'Veon Bell Big Tall Jersey , do I really need to know these port numbers?"
The answer is yes. We do a lot of troubleshooting in this business, and part of becoming an expert troubleshooter is knowing how things work when they're working correctly. That way, when things do go wrong C.J. Mosley Big Tall Jersey , you can take a structured approach to fixing them.
Let's say that you're in the middle of a relaxed day at your network monitoring console. A consulting company is at your site to install a new firewall. While they're working, your phone starts going off - users are suddenly unable to send and receive email from outside the office. The first thing to ask yourself in such a situation:
"What has changed since what is now broken was working?"
In this case, a firewall is being installed - but do you know why that would stop email? Do you know that ports 25 (SMTP) Curtis Martin Big Tall Jersey , 110 (POP3), and 143 (IMAP) must remain unblocked by that firewall? If you do, you already know how to fix the problem.
I can tell you from personal experience that the key to becoming a world-class network troubleshooter is mastering the basics Joe Namath Big Tall Jersey , and that includes knowing common port numbers. And if you're a great network troubleshooter on top of being CompTIA Network+ and CCNA certified, you're always going to be in demand -- and that's where you want to be!
Article Tags: Port Numbers, Transfer Protocol
In-Depth Review of the DestroyIt 2360 Cross-Cut Shredder Technology Articles | July 22 Trevon Wesco Jets Jersey , 2010
After looking over the DestroyIt 2360 Cross-Cut Shredder we were quite pleased with its specs. Now it may not be the cheapest on the market but we think that the few extra bucks you'll spend will be...
After looking over the DestroyIt 2360 Cross-Cut Shredder we were quite pleased with its specs. Now it may not be the cheapest on the market but we think that the few extra bucks you'll spend will be worth it. Check out the specs below and judge for yourself.
Security
This shredder sports a level 4 security which means that no one is going to be able to read your documents. A level 3 in generally sufficient for most environments but the level 4 provides that extra level of security. An added bonus with this machine is that because the shreds are smaller, they take up less space so you'll be able to shred more paper before you have to dump out the bin. This will save you time and money (when it comes to bags).
Shredable Material
The DestroyIt 2360 Cross-Cut Shredder can shred Credit Cards, Paper Chuma Edoga Jets Jersey , Paper Clips, Staples. If you need to be able to shred something else then we recommend that you look at a larger machine andor look for something with a little bit lower security (the higher the security the less likelihood that the machine shreds something other than paper).
Continuous Motor
This shredder is not rated for continuous use. That simply means that you will have to shut the machine down after a certain period of time to let it cool off. Now don't let this scare you away because most people will never reach that point unless they just sit down and start shredding and shredding and shredding. If you plan on doing all your shredding at one sitting then it is highly recommended that you get a machine with a continuous duty motor, otherwise you're just fine.
Bin Size
With a 9.25 gallon bin Jachai Polite Jets Jersey , the DestroyIt 2360 Cross-Cut Shredder can hold a bit more shred than the smallest machines out there, but you'll still be finding yourself emptying the bin fairly frequently. It is great if you need something to fit in a smaller space, but if you shred frequently we recommend jumping up in bin size.
Throat Size
The 9.5 inch throat on this machine gives you a little bit of breathing room when you're shredding regular size paper and the option to shred a few odd shaped things. If you really have large paper Quinnen Williams Jets Jersey , then you'll need to look at machine with something larger than a 10" throat.
Auto Oiler
This machine does not come with an auto-oiler and does not have the option to have one installed. Although automatic oilers are not necessary to maintain your machine, they do take the guess-work out of maintenance. Don't hold it against the machine though as you can easily oil the machine yourself on regular intervals.
Warranty
The DestroyIt 2360 Cross-Cut Shredder comes with a 1 year limited Warranty - Lifetime on cutters. Th. Cheap Jerseys From China Cheap Jerseys Free Shipping Cheap Jerseys Cheap Hoddies Cheap Jerseys Free Shipping Cheap NHL Jerseys Shop Cheap Nike NFL Jerseys Cheap New Jerseys China Wholesale Jerseys Wholesale NHL Hoodies |
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