TUTORIAL 1 Basic Troubleshooting
WEEK 2
TUTORIAL 1 Basic Troubleshooting
IPCONFIG
Ipconfig is a Console Command which can be issued to the Command Line Interpreter (or command prompt) to display the network settings currently assigned to any or all network adapters in the machine. This command can be utilised to verify a network connection as well as to verify your network settings. 6 represents IPV6.
Try the following options
Ipconfig/all
Ipconfig/release
Ipconfig/renew
NETSTAT
Displays active TCP connections, ports on which the computer is listening, Ethernet statistics, the IP routing table, IPv4 statistics (for the IP, ICMP, TCP, and UDP protocols), and IPv6 statistics (for the IPv6, ICMPv6, TCP over IPv6, and UDP over IPv6 protocols). Used without parameters, netstat displays active TCP connections. This will help you to identify the list of connections that is live.
Source: Wikipedia
Type the following command to display active connections showing numeric IP address and port number instead of trying to determine the names and press Enter.
netstat -n
Type the following command to refresh the information at a specific interval and press Enter.
This example refreshes the command in question every five seconds:
netstat -n 5
Once you execute the command, it'll return a list of all active connections in four columns, including:
Proto: Shows the connection protocol (TCP or UDP).
Local Address: Shows the computer's IP address followed by a semicolon with a port number of the connection. The double-semicolon inside brakets indicates the local IPv6 address, and "0.0.0.0" refers to the local address too.
Foreign Address: Lists the remote device's IP (or FQDN) address with the port number after semicolon port name (for example, https, http, microsoft-ds, wsd).
State: Indicates where the connection is active (established), the local port has been closed (time_wait), and the program hasn't closed the port (close_wait). Other status include, closed, fin_wait_1, fin_wait_2, last_ack, listen, syn_received, syn_send, and timed_wait.
You may see the other options available to you using the command below:
netstat/? Will list out the options.
TRACERT
The tracert command is used to visually see a network packet being sent and received and the number of hops required for that packet to get to its destination.
Try this and see what the output is:
tracert www.google.com
PING
Helps in determining TCP/IP Networks IP address as well as determine issues with the network and assists in resolving them.
End
WEEK 2
TUTORIAL 2 Online Logic Designer
At the http://logic.ly site (use the Try Online option) examine the available gates at the left-hand-side of the canvas under logic gates. For example, lets start with the NOT gate. Drag the NOT Gate symbol onto the canvas. It should look like this:
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Next drag a Toggle Switch onto the canvas. It should now look like this:
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Drag form the circular node on the Toggle Switch to the circular node just before the Not Gate. This will connect the two components and now you have a way of inputting to the gate.
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Now drag a Light Bulb to a position to the right of the NOT Gate. Then connect the circular nodes.
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The Light Bulb represents the output result.
Try toggling the Toggle Switch by clicking on it. Notice the state of the Light Bulb. It should switch (on and off) the light bulb.
Does the output match exactly the Truth Table for NOT gate as below?
NOT gate
Input Output
1 0
0 1
Follow the same procedure with the AND Gate and then the OR Gate
Since these gates have two inputs youll need to attach two a Toggle Switch to each. For example:
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Do the inputs and outputs for each gate match the respective Truth Tables?
AND gate Input A Input B Output 1 1 1 1 0 0 0 1 0 0 0 0 OR gate Input A Input B Output 1 1 1 1 0 1 0 1 1 0 0 0 Now can you implement the following Boolean Function using these basic Logic Gates ?F = A.B + A.BEnd
