IT Certification and Training Blog

What are the differences between an IPSec VPN and a GRE tunnel?

Posted by Kelson Lawrence on Jun 5, 2013 8:53:00 AM

By Tim Charlton

IP Security (IPSec) Virtual Private Networks (VPNs) and Generic Routing Encapsulation (GRE) tunnels are both methods for transferring data across public, intermediary networks, such as the Internet. However, there are considerable differences between the two technologies. Let’s start with a brief overview.

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Tags: VPN vs GRE, differences between VPN and GRE, Tim Charlton

MS Windows Tips and Tricks | 2.7.4 IE Security Features

Posted by Kelson Lawrence on May 16, 2013 12:54:00 PM

By Val Bakh

2.7.4 Internet Explorer Security Features

The Internet has become an integral part of our lives. Nowadays, the Internet gives us access to e-mail, instant messaging, telephone, television, banking, shopping, research—you name it. It is so completely woven into nearly everything we do so that most of the time we don’t even think of it as something external, something that we need to connect to before we can make use of it. That is, of course, until something goes wrong. The Internet is not only a convenience; it is also a potential danger.

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Tags: Val Bakh, Internet Explorer Security Features, InPrivate Browsing, Safety menu

What’s an ARP?

Posted by Kelson Lawrence on May 9, 2013 8:21:00 AM

By Delana Hallstedt

My initial plan for this blog post was to attempt to unravel the alphabet soup approach to all things technology related – Why so many acronyms?!? However, upon doing a little bit of research on the origins of acronyms (retronyms, neologism, and alphabetism oh my!), I quickly talked myself out of that and settled on one particular acronym.

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Tags: Delana Hallstedt, ARP, What is ARP?, Address Resolution Protocol

A Cisco Administrator’s Guide to DHCP

Posted by Kelson Lawrence on May 1, 2013 1:28:00 PM

By Amy Haigh

As a network administrator, you will be responsible for ensuring that each host on your network is configured with the appropriate TCP/IP parameters to communicate with other hosts. To communicate on a network, either private or public, a host must be configured with — at minimum — an IP address, a subnet mask, and a default gateway. On a small private network with consistent hosts, you can manually configure these options on each host. But if you administer a large network, or even a small network where laptops and tablets continuously connect and disconnect, you will find implementing Dynamic Host Configuration Protocol (DHCP) to be a lifesaver.

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Tags: DHCP Relay Agent, Guide to DHCP, Amy Haigh, DHCP, DHCP pool, DHCP leases

MS Windows Tips and Tricks | 2.7.3 Windows XP Mode

Posted by Kelson Lawrence on Apr 25, 2013 11:14:00 AM

2.7.3 Windows XP Mode

By Val Bakh

We don’t talk much of Windows Vista nowadays. It didn’t stay on the market very long and was soon replaced with a “new-and-improved” version, Windows 7. The important fact, however, is that Windows Vista was the first of the new generation of Microsoft’s operating systems. The move from Windows XP to Windows Vista and Windows 7 is perhaps even more significant than the long-forgotten departure from Windows NT in favor of Windows 2000. In the big scheme of things, Windows 2000 brought us Active Directory, but from a regular user’s perspective, the change was not all that significant: a prettier graphical user interface (GUI), but not much difference in the applications that users could run. Windows XP added a few new bells and whistles but did not hinder our ability to run most of our favorite legacy applications.

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Tags: Windows XP Mode, Val Bakh, XPM, Windows Virtual PC (VPC)

Network Security Part 2: Threats

Posted by Kelson Lawrence on Apr 23, 2013 8:10:00 AM

By Kailin Acheson

If you are a network administrator, you might be familiar with various types of attacks that malicious users might launch against the network in an attempt to destroy it. These attacks, described in Network Security Part 1: Attacks, include passive, active, close-in, insider, and distribution attacks. As a network administrator, you should also be familiar with possible threats to the network. These include physical threats, reconnaissance attacks, and access attacks.

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Tags: physical threats, reconnaissance attacks, access attacks, hardware threats, environmental threats, administrative threats, Network Security, electrical threats, Kailin Acheson

Network Security Part 1: Attacks

Posted by Kelson Lawrence on Apr 17, 2013 8:44:00 AM

By Kailin Acheson

If you are the administrator of a network, you likely have been thinking about, and possibly worrying about, potential network attacks. It's much more rewarding (and less stressful) to protect a network than to fix it (unless, as Tim Charlton wrote in one of his recent blogs, you like the pressure. It might be helpful to try to answer the following questions as you consider attacks on the network:

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Tags: active attacks, close-in attacks, distribution attacks, Network Security, passive attacks, insider attacks, Kailin Acheson

The New 200-101 ICND2 Exam: Changes and Thoughts

Posted by Kelson Lawrence on Apr 9, 2013 8:42:00 AM

By James Hanback

You've spent all these weeks and some of your hard-earned cash studying for Cisco's 640-816 ICND2 exam only to discover that there's a brand new Cisco Certified Network Associate (CCNA) version 2.0 track. Cisco's 200-101 exam, along with its 100-101 ICND1 prerequisite, was announced on March 26 and is now available to candidates pursuing CCNA certification or recertification. Cisco also released a new version 2.0 of the composite exam, which is numbered 200-120. Among the many questions these new developments raise in your mind as you consider heaving your old 640-816 study guide toward the trash bin might be "Have I wasted my time studying for 640-816?"

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Tags: James Hanback, CCNA, ICND2 Revision, 200-101

The New 100-101 ICND1 Exam: Changes and Thoughts

Posted by Kelson Lawrence on Apr 8, 2013 4:43:00 PM

By Michael Aldridge

Have you ever felt like the cartoon character who tries to kick the football, but at the last second, the football is jerked away, causing the poor guy to flip into the air and land flat on his back? Some of you who are studying for your Cisco Certified Entry Networking Technician (CCENT) or Cisco Certified Network Associate (CCNA) certifications might feel that way after Cisco's recent announcement of brand new ICND1, ICND2, and CCNA exams. But fear not! You're in a much better position than our cartoon counterpart is.

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Tags: Michael Aldridge, ICND1 Revisions, 100-101, CCENT

Back to the Basics: Networks and Topologies

Posted by Kelson Lawrence on Apr 3, 2013 2:30:00 PM

By Kailin Acheson and Delana Hallstedt

As you begin the process of setting up a network, you will likely first need to figure out how to best connect the devices on the network so that communications are optimal. You might have to do a little research, planning, and organizing to make sure everything is positioned to maximize performance on that network. One good place to start is with the devices you will need to deploy. You can ask a few key questions to help point you in the right direction, such as the following:

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Tags: Delana Hallstedt, Networks and Topologies, PANs, Personal area networks, Metropolitan area networks, Kailin Acheson, LANs, MANs, WANs, Local area networks, Wide area networks