Take the Challenge, part 10

Take the Challenge, part 10

Do you consider yourself a networking expert? Test your knowledge and offer your opinion or advice by responding to the latest Challenge set. Review this list or visit the Networking Challenge forum to answer the latest Challenge questions and complete against your peers for a $25 gift certificate to our bookstore. We are thrilled to announce our latest Challenge forum winner. Henry Steinhauer won a $25 gift certifcate for his posts...

to .4EHEaQbds6z.0@ee8e21e@.1dcf90b3/246>several featured questions.

We would like to remind you that these are true questions that have been submitted to one of our various site experts. Due to the overwhelming amount of questions that are received on a weekly basis, our experts are unable to answer them all. That's where you come in -- show your networking skills and help your peers.

Challenge question #46: --> --> --> --> .hIzIaB6zsFd.17@.1dcf90b3/248>"ifdown eth0" command Question as presented to our experts:
After issuing "ifdown eth0" is there any other way of reactivating the interface other than "ifup eth0" or a reboot? In either case should a log file reflect the status changes?
Question submitted by Harris

Challenge question #47: Running new cables Question as presented to our experts:
An entire building needs to be re-cabled, with CAT 5/6 cabling. The original infrastructure was CAT 4, with blocks and patch panels.

Is it wise to run the new cables direct to the switches, or should the new cables be run to a block, or should patch panels be used? If you can, please let me know of the advantages and disadvantages of these different options, bearing in mind, that growth is a huge possibility.
Question submitted by Dunraj

Challenge question #48: Raid level 0 + 1 configuration Question as presented to our experts:
I have two Dual PII Mainboards, equipped with RAID, each running Windows 2000 Pro. Each unit also has two hard drives, a gigabit, and a 100/10 Ethernet connection. If I were to use my external Hot Swappable HD as boot drive would the network handle a RAID level 0 + 1 (2 disks mirroring and two disks striping?) If not what type of network would this call for? Could a second Gigabit PCI do the trick?
Question submitted by Cain

Challenge question #49: Collecting adapter information Question as presented to our experts:
When collecting adapter information using various tools for network scan, how can we determine that a MAC address does not belong to a physical adapter and is the address of a dialup adapter or a VPN? We want to be able to exclude these types of non-physical network addresses when data is collected. Does the MAC address itself indicate by means of particular bit settings in its 48 bit composition? As an example, several machines that showed a MAC address of 44-45-53-54-xx-xx where the adapter description indicates that the MAC belongs to a VPN client or a driver.
Question submitted by Rahul

Challenge question #50: What is a tcpdump? Question as presented to our experts:
What is a tcpdump? Please give me details if possible.
Question submitted by Faruk

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