As we start the new year, I started thinking about something. Why do people think it’s acceptable to take shortcuts in their IT career? Is it because people don’t see the true effect of their work? Or is the cheating
General – Merry Christmas And A Little Gift
Hi all, I had some issues with the site and I haven’t blogged as much lately as I would have hoped but I wanted to wish you a Merry Christmas and send you a little gift from Martin Duggan. Martin
General – Advice on Numbering Policies in Networking
There are several situations where we need to write some form of policy such as QoS, routing policies used in for example redistribution, filtering and policy-based routing, dot1x and so on. Lately I had to update a policy used by
General – Challenges in Load Balancing Traffic
For the last year I have been working a lot with IWAN which is Cisco’s SD-WAN implementation (before Viptela acquisition). One of the important aspects of SD-WAN is to be able to load balance the traffic. Load balancing traffic is
General – My Packing List for CLUS and Advice for International First Timers
It’s almost time for Cisco Live in Las Vegas. It’s Friday morning here and I have 95% of the packing done and I leave on Saturday. If this is your first time going to CLUS or even going to the
CCNA Wireless – CCNA Wireless Notes Chapter 6
802.11 Frame Format In a wired Ethernet network, the switch is not an active participant in communication at L2. In a wireless LAN, the AP is an active participant unless something like 802.11z, Extension to Direct Link Setup (DLS) is
Certification – Major News for Expert Level Recertification
Certification – Major News for Expert Level Recertification Everyone holding an expert level Cisco certification knows the pain of recertifying. Recertification today is achieved by taking any expert level written exam which means you can take the written in the
CCNA Wireless – CCNA Wireless Notes Chapter 5
Types of Wireless Networks Wireless LANs are not the only type of wireless networks that exist. Wireless Personal Area Network (WPAN) WPAN uses low-powered transmitters to create a very short range network, usually 7 to 10 meters. Based on the
CCNA Wireless – CCNA Wireless Notes Chapter 4
Antenna Characteristics Different antennas are needed for different applications. An open office space is very different to to a strip of closed offices. How do you cover a large open area such as a lobby? Covering an outdoor area is
CCNA Wireless – CCNA Wireless Notes Chapter 3
Interference Interference will exist if there are other transmitters on the same channel or adjacent channels. This will lead to loss of frames and the frames will then have to be retransmitted, using up air time. Interference can be caused