Network Tools/Command Flashcards
Software Tools
o Wireless Analyzer
Ensures you have the proper coverage and helps prevent overlap
between wireless access point coverage zones and channels
Protocol Analyzer
Used to capture and analyze signals and data traffic over a
communication channe
Packet Capturing Tool
Used to capture packets running over a network connection in real time
and then save them for later analysis
● Ethereal
● Protocol expert
● Netasyst
● Network analyzer
● Observer
● LanHound
● EtherPeek
● tcpdump
● WinDump
● PRTG network monitor
Bandwidth Speed Test
Verifies the real-world throughput from a client device all the way out to
the Internet and back
Port Scanner
Determines which ports are open on a network
iPerf
Gathers an active measurement of the maximum achievable bandwidth
on an IP-based network
NetFlow Analyzer
Performs monitoring, troubleshooting and in-depth inspection,
interpretation, and synthesis of traffic flow data
Trivial File Transfer Protocol (TFTP)
Protocol for exchanging files between two TCP/IP machines
TFTP Server
Used for simple file transfers on a network and boot-loading of remote
devices
Terminal Emulator
Allows a host computer to access another computer through a commandline interface or a graphical one using either Telnet or SSH
▪ Always use SSH instead of Telnet
● Other terminal emulators:
o Cmder
o ZOC
o Mintty
● If you are working on a Linux client:
o GNOME
o Konsole
o xterm
● If you are working on an OS X client:
o iTerm2
o MacTerm
o Kitty
IP Scanner
Used to search for and detect IP addresses and other information related
to devices on the network
Ping and Traceroute
Ping
▪ Used to check IP connectivity between two devices, most often for
network troubleshooting
▪ Similar to Windows version, except it runs forever by default (like –t in
Windows)
o Traceroute/ Tracert
▪ Displays the path between your device (the source) and the destination
IP address, showing each route hop along the path
o Hop
▪ Any router or firewall that is in the path of the transmission from the
client to the destination
● If cannot ping google.com
o ping 8.8.8.8
● If cannot ping 8.8.8.8
o ping default gateway
● If cannot ping default gateway
o ping local client’s IP address
● If cannot ping local IP address
o ping local host of 127.0.0.1
ipconfig, ifconfig, and ip
IP Configuration (ipconfig)
▪ Displays all of the current TCP/IP network configuration values and
refreshes DHCP and DNS settings for a Windows client/server
o Interface Configuration (ifconfig)
▪ Command line tool used in Unix, Linux, and OS X systems to display IP
address information
▪ ifconfig is considered officially deprecated
o ip
▪ Assigns an address to a network interface or configures network interface
parameters on a Unix, Linux, or OS X operating system
nslookup, dig, and hostname
Name Server Lookup (nslookup)
▪ Used to query the DNS to provide the mapping between domain names
and IP addresses or other DNS records
▪ In Windows, use set q=mx to search for mail exchange records
▪ In Linux, use set type=mx to search for mail exchange records
o dig
▪ Used to conduct queries against DNS nameservers and is only available
for Linux, Unix, and OS X systems by default
o hostname
▪ Used to display the hostname portion of the full computer name for a
given system
● arp, route, nbtstat, netstat
o Address Resolution Protocol (arp)
▪ Used to display and modify entries in the Address Resolution Protocol (or
ARP) cache on a system
▪ An ARP entry in the cache will get deleted after 21,600 seconds (6 hours)
● arp -d
o route
▪ Used to view and manipulate the IP routing table in a Windows, Linux,
Unix, or OS X system
o Default Route
▪ Route that takes effect when no other route is available for an IP
destination address
o nbtstat
▪ Used to view the current connections and statistics for devices
communicating using the NetBIOS over TCP/IP protocol
o Network Statistics (netstat)
▪ Displays information for IP-based connections on a client including its
current sessions, its source and destination IPs, and port numbers
telnet, tcpdump, and nmap
o telnet
▪ Provides a bidirectional interactive text-oriented communication facility
using a virtual terminal connection
o tcpdump
▪ Allows for the display of TCP/IP and other packets being transmitted or
received over a network to the client’s screen
Network Mapper (nmap)
▪ Discovers hosts and services on a computer network by sending packets
and analyzing the responses
Network Platform Commands
Network Platform
▪ Refers to any router, switch, or firewall, regardless of the brand or
manufacturer
● Cisco
o show interface
● Juniper
o show interfaces
● PoE+ 802.3at Sidewinder
o cf interface
● Cisco
o show config
● Juniper
o show configuration
● PoE+ 802.3at Sidewinder
o cf config
● Cisco
o show route
● Juniper
o show route
● PoE+ 802.3at Sidewinder
o cf route status
show interface
Displays statistics for the network interfaces on the device
show config
Displays the current system configuration on the screen
show route
Displays the current state of the routing table on the device
