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CCIE Security Changes Coming!

Mon, 23 Jun 2008 12:57:29 +0000
Security Candidates,
As we speak I’m sitting in the CCIE Security Techtorial led by Yusuf Bhaiji, the CCIE Security Program Manager. The verdict is in… changes are coming for the CCIE Security Lab Exam! I will be making a more detailed post later today about the changes, but in a nutshell the following changes are ...]

An excerpt from my ‘Layer 2 Security’ notes

Wed, 21 May 2008 18:34:23 +0000
Layer 2 Security – “Use either Dynamic ARP Inspection (DAI) or private VLANs to prevent frame sniffing”

 
Introduction to DAI:
- DAI prevents man-in-the middle attacks that misuse IP ARP (gratuitous ARPs)
- DAI checks at ingress only
- When DAI is enabled, all ports are untrusted by default, ports configured as being trusted bypass DAI checks
General Configuration (DHCP ...]

Internetwork Expert Leads CCIE Training Industry

Fri, 04 Jul 2008 16:53:32 +0000
Recently a marketing release by a competing CCIE vendor was brought to my attention. One section that caught my eye in particular in the release asked “Which Vendor has the MOST Successful Students to Its Credit?”. Immediately I thought, well Internetwork Expert obviously! However, the release went on to say that “vendor] ...]

Show isdn service

Mon, 18 Sep 2006 04:19:34 +0000
To find out which channels are in service, which are out of service, use command,
sh isdn service. Here is a sample output from a Cisco IOS router.
 BR1#sh isdn service
PRI Channel Statistics:
%Q.931 is backhauled to CCM MANAGER 0×0003 on DSL 0. Layer 3 output may not appl
y
ISDN Se0/0/1:23, Channel 1-24]
  Configured Isdn Interface (dsl) 0
   Channel ...]

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