September 2015
Intermediate to advanced
608 pages
21h 29m
English
Content preview from Santos:CCNA Sec 210-260 OCG
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Do Not Allow Negotiations
The preceding example prevents a user from negotiating a trunk with the switch, maliciously, and then having full access to each of the VLANs by using custom software on the computer that can both send and receive dot1q tagged frames. A user with a trunk established could perform “VLAN hopping” to any VLAN he desired by just tagging frames with the VLAN of choice. Other malicious tricks could be done, as well, but forcing the port to an access port with no negotiation removes this risk.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.