Comments on: CompTIA A+ 220-701: 3.2 – Command Line Utilities

By: Professor Messer

Professor Messer — Thu, 22 Dec 2011 20:33:00 +0000

I’m actually zero hops away from the local device that I initially pinged, which is why the TTL remained at 64; this device was so close that I didn’t need to traverse a router in order to receive a ping response from it.nnTTL is a countdown timer; it starts at a particular number and decreases by one each time it goes through a router. When the time to live reaches zero, a router discards the packet.

By: Sergey

Sergey — Thu, 22 Dec 2011 20:18:00 +0000

nnYou stating in the above video: “and the time tonlive was 64 hops, so this is really close to me”. It is just does not makensense. You running PING from 192.168.0.10 host which is in the same subnet thatnis your router (192.168.0.1). In fact you just 1 hop away from your own routern(not 64 hops). What TTL field really is that what value responding device setsnin IP header’s TTL field when it sends packets out.nnn

By: Professor Messer

Professor Messer — Thu, 22 Dec 2011 19:32:00 +0000

The comments about TTL in this video are accurate, although I don’t go into details about TTL or how it works (I describe TTL in the networking section and in the Network+ videos). nnWhat part of the TTL description do you find inaccurate?

By: Sergey

Sergey — Thu, 22 Dec 2011 19:22:00 +0000

Video 1 at 5:58. Professor, please correct your statement about TTL field in the PING command output. It is not accurate.

By: April

April — Tue, 09 Nov 2010 15:01:41 +0000

I’m on Vista the telnet setting was off. You have to turn it on for telnet to work. So if your on Vista and your having trouble with telnet that is the reason. Not hard to turn it on. Go to Control Panel, Programs, Turn Windows features on/off then just scroll down tell you find tell net and just check the box to turn it on. A permission box will pop up and you have to click continue. It will take a few min for the computer to configure it.

By: LCH

LCH — Wed, 02 Jun 2010 20:42:03 +0000

Jeff:

You can use System Restore: http://support.microsoft.com/kb/322756 – there are links on that page to backing up Vista and 7 as well.

By: JDG

JDG — Sun, 30 May 2010 15:07:56 +0000

Win7 is not in the Comptia 220-701 objectives… So he won’t be talking about it.

By: john frogue

john frogue — Thu, 06 May 2010 06:33:57 +0000

when are you going to talk about windows 7 OS? Is ther much difference from Vista or the ne Win7?

By: Jeff

Jeff — Sun, 11 Apr 2010 18:07:34 +0000

If you create a restore point before you screw up the registry with regedit, can you use System Restore to restore the registry? Or does System Restore have nothing to do with the registry?