| Passing the Network+ and CCNA exams
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| | working, your phone starts going off -
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| demands that you know quite a few port
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| | users are suddenly unable to send and
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| numbers, but they're important to know
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| | receive email from outside the office.
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| when working with real-world networks as
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| | The first thing to ask yourself in such a
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| well. Before we discuss why, here's a
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| | situation:"What has changed since what is
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| partial list of important port numbers to
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| | now broken was working?"In this case, a
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| know for these certification exams:Ports
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| | firewall is being installed - but do you
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| 20 and 21 are used by File Transfer
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| | know why that would stop email? Do you
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| Protocol (FTP).Port 22 is used by Secure
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| | know that ports 25 (SMTP), 110 (POP3),
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| Shell (SSH).Port 23 is used by
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| | and 143 (IMAP) must remain unblocked by
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| Telnet.Port 25 is used by Simple Mail
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| | that firewall? If you do, you already
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| Transfer Protocol (SMTP).Port 53 is used
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| | know how to fix the problem.I can tell
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| by DNS.Port 69 is used by Trivial File
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| | you from personal experience that the key
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| Transfer Protocol (TFTP).Port 80 is used
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| | to becoming a world-class network
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| by HTTP.Port 110 is used by POP3.Port 143
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| | troubleshooter is mastering the basics,
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| is used by IMAP.Port 443 is used by
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| | and that includes knowing common port
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| Secure HTTP (HTTPS).When you're faced
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| | numbers. And if you're a great network
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| with a list such as this, there's a
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| | troubleshooter on top of being CompTIA
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| temptation to ask yourself something like
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| | Network+ and CCNA certified, you're
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| this: "Besides passing the exam, do I
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| | always going to be in demand -- and
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| really need to know these port
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| | that's where you want to be!Chris Bryant,
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| numbers?"The answer is yes. We do a lot
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| | CCIE #12933, is the owner of The Bryant
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| of troubleshooting in this business, and
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| | Advantage, home of over 100 free
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| part of becoming an expert troubleshooter
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| | certification exam tutorials, including
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| is knowing how things work when they're
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| | CCNA and CCNP tutorials. CompTIA
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| working correctly. That way, when things
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| | Network+, Security+, and A+ certification
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| do go wrong ,you can take a structured
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| | tutorials are available, also!Visit his
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| approach to fixing them.Let's say that
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| | blog and sign up for Certification
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| you're in the middle of a relaxed day at
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| | Central, a daily newsletter packed with
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| your network monitoring console. A
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| | CCNA, Network+, Security+, A+, and CCNP
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| consulting company is at your site to
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| | certification exam practice questions!
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| install a new firewall. While they're
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| |
|
