Network and Communication

Codes to learn for LABFAT, under Prof. Navamani TM. ✨ 🤘

1. Network Configuration Commands

Commands under this sub-section might not come for LABFAT, but it's general understanding is required for VIVA or QUIZ.

1.1) ping

Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol network.

ping www.vit.ac.in

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1.2) netstat

metstat (network statistics) displays network connections for the Transmission Control Protocol (both incoming and outgoing), routing tables, and a number of network interface (network interface controller or software-defined network interface) and network protocol statistics

netstat -a

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1.3) tcpdump

This is a sniffer, a program that captures packets off a network interface and interprets them.

tcpdump -D

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1.4) hostname

The hostname command is used to show or set a computer's host name and domain name.

hostname

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1.5) traceroute

Traceroute is a command which can show you the path a packet of information takes from your computer to one you specify.

traceroute www.vit.ac.in

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1.6) traceroute

Traceroute is a command which can show you the path a packet of information takes from your computer to one you specify.

traceroute www.vit.ac.in

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1.7) finger

Finger may be used to look up users on a remote machine.

finger

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1.8) ifconfig

Running ifconfig with no options will display the configuration of all active interfaces.

ifconfig

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1.9) dig

Dig stands for (Domain Information Groper) is a network administration command-line tool for querying Domain Name System (DNS) name servers. It is useful for verifying and troubleshooting DNS problems and also to perform DNS lookups and displays the answers that are returned from the name server that were queried.

dig

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1.10) telnet

Telnet is a user command and an underlying TCP/IP protocol for accessing remote computers. Through Telnet, an administrator or another user can access someone else's computer remotely.

telnet 10.10.5.21 [only on available IP addresses, might not work on every IP.]

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1.11) ftp

ftp stands for file transfer protocol and can be used by servers to download or upload data through a specific link.

ftp 10.30.151.151

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1.12) arp

The "arp" Command. arp displays and modifies entries in the Address Resolution Protocol (ARP) cache, which contains one or more tables that are used to store IP addresses and their resolved Ethernet or Token Ring physical addresses.

arp -e

There are many more commands but this should suffice.

2. Error Detection and Correction (C PROGRAMS)

2.1) Parity Checking
2.2) Checksum
2.3) CRC
2.4) Hamming Code

3. Flow Control

3.1) Stop and Wait
    1) Sender
    2) Reciever
3.2) Selective Repeat
3.3) Go Back N

4. IP Addressing (PYTHON PROGRAMS)

4.1) IP Address Validity
4.2) Analysis of IP Address

5. Packet Tracing (WireShark)

5.1) TCP Socket Programming
    1) Server
    2) Client
5.2) UDP Socket Programming
    1) Server
    2) Client

6. Network Simulation

NS2 has some code that I dont understand yet, for now what I have understood is up in the 6th script.
6) NS2