Command Line Tools

Question 1

ipconfig

Answer 1

Displays current TCP/IP
network configuration values

Question 2

ipconfig /all

Answer 2

View additional configuration information, such as DNS servers and MAC addresses

Question 3

ipconfig /renew

Answer 3

Renew IP address
-computers ip address not working properly and you want to obtain new address from DHCP server

Question 4

ipconfig /release

Answer 4

Release current IP address
-computers ip address not working properly and you want to obtain new address from DHCP server

Question 5

ipconfig/flushdns

Answer 5

Erase DNS cache
-problems connecting to websites

Question 6

Ping

Answer 6

Tests whether another host is available over the network-check if another host is “alive”
Ex: ping 192.168.0.1

Question 7

Ping 127.0.0.1

Answer 7

Test whether TCP/IP installed properly, even if not wired to the network
IPv4
Also use ping loopback or ping localhost adding -4

Question 8

Ping ::1

Answer 8

Ping for IPv6
Also use ping loopback or ping localhost adding -6

Question 9

ping -t

Answer 9

Pings host until command is stopped
Plug and unplug cables to see which cables or ports are live
Monitor a connection over time to check packet drops and connection slowing

Question 10

ping -n

Answer 10

Pings a host a specific number of times
Good baseline tool, run every day against a router or server and compare results
Ping -n 20 192.168.0.1

Question 11

ping -l

Answer 11

Pings the host, but you can specify the number of bytes per packet to be sent
Beneficial when testing how a server, router or other device reacts to larger packet sizes
ping -1 1500 192.168.0.1

Question 12

ping -a

Answer 12

Resolves addresses to hostnames, see hostname associated with IP address

Question 13

ping -4

Answer 13

Forces use of IPv4 and results in IPv4-based data
ping -4 loopback results in reply from 127.0.0.1

Question 14

ping -6

Answer 14

Forces use of IPv6 and results in IPv6-based data
ping -6 loopback will result in a reply from ::1

Question 15

tracert

Answer 15

Sends packets to destinations beyond the local computer’s network. Pings each router along the way between you and the final destination

Question 16

tracert /d

Answer 16

Does not resolve IP addresses to hostnames, shown as corresponding IP addresses only.
Connecting by IP address will always be faster than connecting by name

Question 17

hostname

Answer 17

Displays the name of the local computer
Programmatically referred to as the %COMPUTERNAME% variable in any windows system

Question 18

netstat

Answer 18

Shows network statistics for the local computer
Default command displays sessions to remote computers
Output:
Active connections
TCP %COMPUTERNAME% :1395 8.15.228.165: https ESTABLISHED

Question 19

Netstat -n
Netstat -a
Netstat -an
Natsrat -nab

Answer 19

-See information numerically
-See TCP and UDP sessions
-See TCP and UDP in numeric format
-Include the executable name for each session shown

Question 20

nslookup

Answer 20

name server lookup
Queries DNS servers to discover DNS details, including the IP addresses of hosts
Can aid in finding DNS servers and DNS records in a domain

Question 21

dig

Answer 21

Linux equivalent of nslookup
Queries DNS servers to discover DNS details, including the IP addresses of hosts
Can aid in finding DNS servers and DNS records in a domain

Question 22

net

Answer 22

Actually a collection of commands

Question 23

net stop

Answer 23

Stop a service

Question 24

net start

Answer 24

Start a service from command line

Question 25

net view

Answer 25

See which computers are currently available on the network

Question 26

net share

Answer 26

Share folders for other users to view

Question 27

net use

Answer 27

View any currently mapped network drives **net use x: \\computername\sharename**

Question 28

net user

Answer 28

Lists user accounts on the local computer Create accounts from here using **net user/add %username%**

Question 29

net user/active

Answer 29

Activate user accounts

Question 30

net user /delete

Answer 30

Delete user accounts

Question 31

arp

Answer 31

**Address Resolution Protocol** Resolves between IP addresses and MAC addresses so data communications can flow from the OS to the physical network adapter