COMMAND

Question 1

ping

Answer 1

primary TCP/IP command used to troubleshoot connectivity, reachability, and name resolution.
roundtrip time (ICMP)
ex:(ping IP address)

Question 1

ipconfig

Answer 1

Internet Protocol configuration
- shows IP address, Subnet Mask, and Default gateway for all adapters
(TCP/IP)

Question 2

ipconfig/all

Answer 2

shows the description of each network connection along with additional information such as your physical (MAC) address, DHCP connections, Lease times, as well as in-depth IPv6 information.

Question 3

ifconfig

Answer 3

(ipconfig for linux)
displays the current configuration for a network interface when no optional parameters are supplied

Question 4

ip

Answer 4

(Linux, Unix)
used to show or manipulate routing, devices, and tunnels
(better than ifconfig)

Question 5

nslookup

Answer 5

DNS info; find a host’s IP address or domain name
(DNS)(CNAME)
(on Linux, windows)

Question 6

dig

Answer 6

(LINUX)
DNS info
like nslookup, but better

Question 7

tracert

Answer 7

(WINDOWS)
determine hops taken along route; traces every hop
(ex router) (ICMP TTL)

Question 8

traceroute

Answer 8

tracert but for LINUX

Question 9

arp

Answer 9

address resolution protocol
-determine MAC address based on IP
(need hardware)

Question 10

arp -a / arp -g

Answer 10

view local table for particular IP
(can also use arp -g)

Question 11

arp -d (then IP)

Answer 11

delete an entry from the ARP table for a particular interface.

Question 12

arp -s (then IP, and MAC address)

Answer 12

add static entry in ARP table

Question 13

netstat

Answer 13

displays the contents of various network-related data structures for ACTIVE connections

Question 14

netstat -a

Answer 14

show ALL active ports

Question 15

netstat -b

Answer 15

show binaries

Question 16

netstat -n

Answer 16

do not resolve names (only IP addresses)

Question 17

netstat -r

Answer 17

view routing table
(where packets will go)
(linux, ,mac, windows)(like route print)

Question 18

hostname

Answer 18

displays the name of the current host system
(FQDN and IP)
(on many OS)

Question 19

route

Answer 19

allows you to make manual entries into the network routing tables.
(windows: route print)

Question 20

telnet

Answer 20

remote login to devices (NOT SECURE, SSH is)
can check IP and Port:
ex: (telnet 192.12.28.110 443)

Question 21

tcpdump

Answer 21

a packet analyzer that is launched from the command line
(linux, Mac, wimdows)

Question 22

nmap

Answer 22

Network Mapper
network exploration, host discovery, and security auditing
scan port, OS, service
(LINUX)

Question 23

show interface

Answer 23

displays statistics for the network interfaces

displays the status and configuration information for the ports within the switch

Question 24

show config

Answer 24

displays all the configuration settings for the device that have been changed from the default settings

Question 25

show route

Answer 25

used to display the IPv4 routing table of a router.