Network complexity plays a very important role during network design. Every network designer tries to find the simplest design. Although there is no standard definition for the network complexity yet, there are many subjective definitions. In today network designs decisions are taken based on an estimation of network complexity rather than absolute, solid answer. If… Read More »
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A few years ago Google made a proposal for a new HTTP compression method, called SDCH (SanDwiCH). The idea behind the method is to create a dictionary of long strings that appear throughout many pages of the same domain (or popular search results). The compression is then simply searching for the appearance of the long strings in a dictionary and replacing them with references to the aforementioned dictionary. Afterwards the output is further compressed with DEFLATE.
CC BY SA 2.0 image by Quinn Dombrowski
With the right dictionary for the right page the savings can be spectacular, even 70% smaller than gzip alone. In theory, a whole file can be replaced by a single token.
The drawbacks of the method are twofold: first - the dictionary that is created is fairly large and must be distributed as a separate file, in fact the dictionary is often larger than the individual pages it compresses; second - the dictionary is usually absolutely useless for another set of pages.
For large domains that are visited repeatedly the advantage is huge: at a cost of single dictionary download, all the following page views can be compressed with much higher efficiency. Currently we aware Continue reading
I will be attending this year’s Cisco Live US in San Diego!
This is my first Cisco Live, so I dont really know what to expect. There are alot of great sessions that I want to attend (if they are not already full), and I will be posting my week here when i have my sessions down.
If you want to connect for a coffee or a chat, feel free to drop me a mail/tweet, and im sure we can figure something out!
See you in San Diego!
The IPv6 Security Summit at the Troopers conference always has a few awesome IPv6 presentations (many people claim Troopers is the conference to attend if you’re serious about IPv6), and this year was no exception. A day after the MLD bashing, Enno Rey delivered a great in-depth presentation on DHCPv6 features and shortcomings.
It seems the DHCPv6 intricacies presented in that talk were too much for some of the attendees – that afternoon I accidentally stumbled upon a visibly distressed gentleman who started our chat with “How could anyone expect us to deploy IPv6 in a production environment?”
Read more ...The worst feeling for a geek:
Courtesy of xkcd (http://xkcd.com/979/)
This has happened to me twice now: upgrading Mac OS X from one release to another and after the dust settles, the search function in Outlook 2011 totally breaks and always returns “no results”. As we all know, email sucks and being able to deftly search through that mound of crap in your mail client is the only thing that makes it somewhat bearable.
When I upgraded from 10.8 to 10.9, I was the guy in the cartoon above. I had to resort to uninstalling and reinstalling all of Office to get this repaired. Urgh.
Well, I just upgraded from 10.9 to 10.10 and lo, the same problem with Outlook search. However this time my karma must be right topped off because I found the solution buried in a message board after an hour or so of searching.
Sweet, merciful help!
The post is from the macrumors.com forum and exactly described the issue and how to fix it on my machine. As stated, the permissions on my Microsoft Office 2011 directory allowed only my account to open the directory:
jknight@mac:~% ls -ld /Applications/Microsoft Office Continue readingCisco announced 2016 CCDE Practical exam dates. CCDE practical exam is organised only in every 3 months. Prerequisite for the exam is CCDE Written Qualification exam. You can attend the exam 4 times a year in a Professional Pearson Centers. I am planning to start my CCDE trainings 2 months before an announced exam date… Read More »
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The worst feeling for a geek:
Courtesy of xkcd (http://xkcd.com/979/)
This has happened to me twice now: upgrading Mac OS X from one release to another and after the dust settles, the search function in Outlook 2011 totally breaks and always returns “no results”. As we all know, email sucks and being able to deftly search through that mound of crap in your mail client is the only thing that makes it somewhat bearable.