Basic network commands D315

Ping

Test connectivity between 2 devices on a network

ipconfig

Windows command that shows the IP configuration settings on a PC

ifconfig

Linux command for finding out a computer's IP address information

traceroute/tracert

Traces the path packets take to reach a network destination

Tracepath

A network tool that traces the route packets take to a destination, identifying each hop and measuring delays, used for diagnosing connectivity issues.

ARP - Address Resolution Protocol

• Displays and modifies the ARP table, which maps IP addresses to MAC addresses

• Command used to perform resolution of MAC to IP

• Displays table consisting of IP addresses and their physical addresses

Netstat

Displays network connections, routing tables, and interface statistics.

nslookup

Queries DNS to resolve domain names to IP addresses

Dig

Queries DNS servers for DNS records

Whois

Retrieves registration info about domains and IPs

Route

Views and manipulates the IP routing table

SCP - Secure Copy Protocol

Securely transfers files between systems using SSH

FTP (File Transfer Protocol)

- transfers files between systems

TFTP - Trivial File Transfer Protocol

Lightweight file transfer protocol without authentication

Finger

Displays user information on a system

Nmap

Scans networks for hosts and services

TCPdump - transmission control protocol dump

Captures and analyzes network traffic

Telnet/SSH (Secure Shell)

Connects to remote systems (Telnet is insecure, SSH is secure).

Ip config

Windows command-line utility used to display TCP/IP configuration settings

If config

Linux command line utility used to display TCP/IP configuration settings

nslookup

Obtains a domain name to IP address mapping

Trace route

Linux command for displaying intermediate points the IPv4 packet is passed through

tracert

Windows command that tracks and displays route taken by 1Pv4 packets on their way to another host

Route

Windows command used to display contents of a routing table

Telnet

Provides unencrypted access to a command line interface on a remote host

tcpdump

A command-line packet sniffing utility.

nmap

Used for discovering hosts and open ports on a network