Class and object

Object inherit class.

1. Open console editor
2. Do import
system.net.sockets
system.text
used for conversion between bytes and strings


So do the following code:
1. Dim client as net.sockets.tcpclient
2. Dim stream as networkstream = Nothing

You just created a new tcp client, and a stream for when the connection is made so we can send and receive information between the client and the server.

3. Make a connection attempt
For this you need a server and the IP address and port of the server.
This time your computer is also a server.

useful windows command-line

1. mstsc
2/ control panel commandline

   Control panel tool             Command
   -----------------------------------------------------------------
   Accessibility Options          control access.cpl
   Add New Hardware               control sysdm.cpl add new hardware
   Add/Remove Programs            control appwiz.cpl
   Date/Time Properties           control timedate.cpl
   Display Properties             control desk.cpl
   FindFast                       control findfast.cpl
   Fonts Folder                   control fonts
   Internet Properties            control inetcpl.cpl
   Joystick Properties            control joy.cpl
   Keyboard Properties            control main.cpl keyboard
   Microsoft Exchange             control mlcfg32.cpl
      (or Windows Messaging)
   Microsoft Mail Post Office     control wgpocpl.cpl
   Modem Properties               control modem.cpl
   Mouse Properties               control main.cpl
   Multimedia Properties          control mmsys.cpl
   Network Properties             control netcpl.cpl
                                  NOTE: In Windows NT 4.0, Network
                                  properties is Ncpa.cpl, not Netcpl.cpl
   Password Properties            control password.cpl
   PC Card                        control main.cpl pc card (PCMCIA)
   Power Management (Windows 95)  control main.cpl power
   Power Management (Windows 98)  control powercfg.cpl
   Printers Folder                control printers
   Regional Settings              control intl.cpl
   Scanners and Cameras           control sticpl.cpl
   Sound Properties               control mmsys.cpl sounds
   System Properties              control sysdm.cpl
    

Try.. Catch ..

If an operation of writing a file is fail, what do you next.

Scratch

Scratch help us to:
1. Create own computer games
2. Create interactive stories
3. Create animation
Without having to write code a.k.a just by drag-and-drop.

WIFI

Master said: "It just a configuration"

1. Set up wireless network

Data yang diperlukan:
Nama SSID yang akan dibuat:
Apakah SSID boleh dimunculkan atau tidak boleh.
Jenis keamanan jaringan yang akan digunakan: WPA, WPA2
Password untuk masuk ke dalam SSID:




2. Bridging 2 wireless coverage between 2 access point
Syarat: AP 1 harus bisa detek AP 2. AP2 harus bisa detek AP1.

Parameter yang perlu disetting:

3. Denying a host / MAC filtering

Data yang diperlukan:
Alamat MAC PC/laptop/gadget yang ingin dilarang masuk ke dalam SSID.

4. Set up login server / RADIUS server

5. Set up SNMP server for the access point

6.

Network Troubleshooting

ipconfig
ping
tracert
nslookup

IPconfig

ipconfig: information gathering: ip address, your router's ip address, your DNS server ip address, DHCP server iP address (ipconfig /all),

Ping

ping: allows you to send a SIGNAL to another Device on the NETWORK to see if it is ACTIVE
try:
1. ping your router a.k.a gateway a.k.a default router.
2. ping other PC.
3. ping outside the network PC.

Tracert

Tracert let's you see, the step-by-step route a packet takes to the destination you specify.

You can also use the term HOPS instead of routers. So, if it takes 10 routers to get to google.com, you can instead say. "it took 10 hops".

NSLOOKUP

This command will fetch the DNS records for a given domain name or for a given IP address. Remember the IP address and domain names are stored in DNS servers, so the nslookup command cause you to query the DNS Record to gather information.

8.8.8.8 --> google-public-dns-a.google.com

Terdiri dari:
1. Interactive mode
2. Non-interactive mode

Non-authoritative : non-your DNS server reply.

ls -a

Record type Name server

1. CNAME
Nickname; alias for a machine.
Name:
Hostname:

2. A record
Informasi yang butuh:
1. Name:
2. Address:

3. SOA record
Data yang dibutuhkan
1. Name :
2. Primary server name:
3. Minimum T T L:
4. Retry time:
5. Mail Box:
6. Refresh Time:
7. Expiry Time:

4. NS record
Data yang dibutuhkan
1. Name
2. Server name

IANA list of root server DNS
IANA list of root server DNS