To change a dynamic disk back to a basic disk using a command line

• The disk must not have any volumes nor contain any data before you can change it back to a basic disk.
  
• If you want to keep your data, back it up or move it to another volume before you convert the disk to a basic disk.
  
• Once you change a dynamic disk back to a basic disk, you can create only partitions and logical drives on that disk.

1. Back up all volumes on the disk you want to convert from dynamic to basic.

2. Open a command prompt and type diskpart.

3. At the DISKPART prompt, type list disk. Make note of the disk number you want to convert to basic.

4. At the DISKPART prompt, type select disk <disknumber>.

5. At the DISKPART prompt, type detail disk <disknumber>.

6. For each volume on the disk, at the DISKPART prompt, type select volume= <volumenumber> and then type delete volume.

7. At the DISKPART prompt, type select disk <disknumber>. Specify the disk number of the disk that you want to convert to a basic disk.

8. At the DISKPART prompt, type convert basic.

Disable USB ports on Windows PC via Registry

1. Click on Start.
2. Click on Run. If you cannot find RUN, type it in the search box.
3. Type "regedit" without quotes. This will launch the Registry Editor.
4. Navigate to  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\usbstor.
5. In the work area, double click on Start.
6. In the Value Data box, enter 4.
7. Click on OK.
8. Close Registry Editor and refresh your desktop.
9. To re-enable access to your USB ports, enter 3 in the Value Data box in Step 6.

Try it in your Risk.

Open Shortest Path First(Protocol)

Open Shortest Path First (OSPF) is a routhing Protocol.

protocol for Internet Protocol (IP) networks. It uses a link state routing algorithm and falls into the group of interior routing protocols, operating within a single autonomous system (AS).

Note:

• Link state Routing Protocol.
• No Limit of Hop Count.
• AD (Administrative Distance) value 110.
• OSPF support cost and bandwidth as Metric.
• OSPF was design only for IP Network.
• Develop by IETF(Internet Engineering Task Force ).
• Three Version of OSPF.

1.           Ver 1
2.           Ver 2
3.            Ver 3

• OSPF can Support Authentication  CIDR and VLSM.
• Support Multi casting.
• Work with Autonomous System and Area.
• Utilize the more hardware sunc as processor and ram.
• keep the entire Topology Information in Router memory.
• It always Computing the Network Information by sending Advertisement packet.