Tuesday, August 19, 2008

It's Tuesday, August 19, and here are the answers to yesterday's questions!

CCNA Certification And CCENT Certification:

What does the "200" at the end of this static route d0? Why would we use this kind of route?

R1(config)#ip route 200

Answer: The "200" is the administrative distance of this static route, as illustrated by IOS Help:

R1(config)#ip route ?
<1-255> Distance metric for this route
name Specify name of the next hop
permanent permanent route
tag Set tag for this route

R1(config)#ip route 200

I'll have a full CCNA tutorial on floating static routes on the main site later this week showing you an example of why we use these routes!

CCNA Security Certification / CCNP ISCW Exam:

What benefit does "GRE over IPSec" offer than IPSec by itself does not?

Answer: By combining GRE and IPSec, each protocol helps to compensate for the other's limitation:

IPSec adds data integrity and confidentiality that GRE does not offer

GRE offers the ability to carry routing protocol traffic, which IPSec does not offer

Why call it "GRE over IPSec" rather than "IPSec over GRE"? Because the GRE encapsulation happens first, and then that encapsulation is encapsulated again, by IPSec. In effect, we have a GRE tunnel inside an IPSec tunnel.

CCNP Certification / BSCI Exam:

Name three popular IPv4-to-IPv6 network conversion methods.

Answer: Dual stack, 6-to-4 tunneling, and NAT-PT. Tutorials on each of these methods are on the way!

CCNP Certification / BCMSN Exam:

Name and define the basic purpose of each "A" in AAA.


Authentication - Determines who can access the network and who cannot.

Authorization - Determined what Authenticated users can do once they're in the network.

Accounting - Tracking users' actions and resource usage for billing and accountability.

CCNP / ONT Exam: (My ONT Study Package was released yesterday -get over there and save on the regular price!)

Name the major components of a Cisco Autonomous Wireless Network.

Answer: Besides the Autonomous APs, we have the Wireless LAN Solution Engine (WLSE) and Wireless Domain Services (WDS).

More questions for you later today!

To your success,

Chris Bryant
CCIE #12933

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